Progenitor & Webmaster

Kirt Blattenberger

BSEE

KB3UON

EIEIO

**Carpe Diem!**

(Seize the Day!)

**5th MOB**:

My USAF radar shop

**Airplanes and Rockets**:

My personal hobby website

**Equine Kingdom**:

My daughter Sally's horse riding website

These calculators are offered free of charge - some by vendors and others by individuals. Some are stand-alone and others function online via Java from the web page. The majority are engineering calculators, but some are scientific calculators, some are amateur radio calculators, and some are electrician type calculators.

See also the RF Cafe Online Calculators!!

A good way to find on this page what you need is do a browser page search.

If you cannot find what you are looking for here, try the Software page.

**AccelWare**

accelware.com

Unit Conversion Tool - powerful, intuitive, and easy-to-use utility for quick and accurate
conversion between almost every possible unit of measure, from one system to another. The latest version includes more than 2200 units in 78
categories. The categories include: length, area, speed, mass, numbers, volume, time, density, force, pressure, energy, power, flow, temperature,
angle, light, fractions, data transfer, and many more. Fully functional Online version now available.

**AlphiMAX P2P Signal Propagation Calculator**

alphimax.com/ptp/overview

A very nice graphical interface tools that enables
you to compare manufacturers, while taking into account the terrain of your area, terrain type, climate, antenna type, define fade margin and
more. Use of a GPS database produces a very accurate elevation profile between antenna locations.

**Antenna Design Calculator**

q-par.com/capabilities/software/microwave-antenna-calc-instructions

The upper section relates
antenna diameter and frequency to gain and beamwidth. Using the scroller, set the beamwidth against the 3 dB or 10 dB marker, and read off the
corresponding frequency and diameter; or set the frequency against the diameter and read off the beamwidth. By Q-par Angus.

**Antenna Power Tools**

awapps.commscope.com/downloads

Andrew's complete collection of antenna planning software.

**Antenna System Evaluator**

n6ach.com/calc/antenna.html

Evaluate consequences of SWR & feedline losses, KD6DKS.

**Antenna System Planner **

awapps.commscope.com/downloads/amsp/

By Andrew Corporation.

**ATC Quick-Calc**

atceramics.com/designsupport

Capacitor Calculation, American Technical Ceramics.

**Attenuator Calculators**

rfcafe.com/references/spreadsheets/atten-calc-ss.htm

"T" and Pi topologies using online interactive
Excel OWA technology. Here is a JavaScript version.

**Attenuator Calculator**

microwaves101.com/encyclopedia/calcattenuator.cfm

Four topologies: "T", Pi, Bridged-T, Reflection.

**Attenuator Calculator**

http://www.phasematrix.net/phasematrix/rf-design-tools/tee-a-pi-attenuator-calculator

Very nicely
done online interactive calculator - by Microwaves & RF, Paul Khanna of Phase Matrix

**Attenuator Calculator**

db0smg.afug.uni-goettingen.de/~dk1rm/tools/att.html

DK1RM

Here is a JavaScript version for
Pi and T attenuators - auf Deutsch. Here it is

**in English**

babelfish.yahoo.com/translate_url?doit=done&tt=url&intl=1&fr=bf-home&trurl=http://db0smg.afug.uni-goettingen.de/~dk1rm/tools/index.html&lp=de_en&btnTrUrl=Translate

Other calculators available by clicking on the**Tools**

db0smg.afug.uni-goettingen.de/~dk1rm/tools/index.html

link.

**Attenuators **

sandiego.edu/~ekim/e194rfs01/minl_atten/minlosatten.html

Minimum loss attenuator design.

**AVX SPIMIC**

avxcorp.com/SpiApps

Capacitor calculation.

**Besser Associates**

besserassociates.com

415-949-3300 / Los Altos, CA

**Reflectometer**

bessernet.com/Ereflecto/tutorialFrameset.htm**Butterworth Filter Designer**

bessernet.com/Ebutterworth/tutorialFrameset.htm

**dBm-to-dbW**

bessernet.com/jobAids/dBmCalc/dBmCalc.html

and **Smith Chart** applets

bessernet.com/jobAids/jSmith/jSmith.html

**Broadcast Engineer's Calculators**

bobgroome.com

by SOB (Sweet Old Bob)

HD cost estimates; Antenna, coax & other
losses, Dual input HD Antenna TPO's; Convert units of Measure, High level combining; Look up ballpark coax loss & power ratings; Dehydrator
size for up to 4 coax runs; Beam tilt and/or null fill Needed; STL path calculator for 950 paths; FM antennas; Gain of parabolic antenna; Channel
vs. frequency; FM/TV; Plot Fresnel path; AM tower height & rigid coax; Power calculations; BTUs; Conduit size for your wire bundle; Does
FM pattern meet FCC limits; Ohm's Law; Wire and circuit size for deicers; FCC Official RFR Model Program Link

**Broadcast Engineering Related Calculators**

allenk.home.infionline.net/engpgms.html

Allen's Broadcast Engineering Extravaganza

Lots of good JavaScript calculators: AM Common Point / Antenna Current Calculator, FM Transmitter Power Output Calculator, RPU/STL Transmitter
Frequency Tolerance Calculator, AM Transmitter Harmonics Calculator, Free Space Loss Between Isotropic Radiators Calculator, 0.6 First Fresnel
Radius Zone Calculator, VSWR Calculator, Coaxial Cable Loss Calculator, Coax Cable Loss/Antenna Gain Calculator, Opamp Gain Calculator

**Cable Performance Calculators**

timesmicrowave.com/cable_calculators

Calculate loss & power, VSWR & return loss,
by Times Microwave.

**Calc101**

calc101.com

By webMathematica, scores of online interactive calculators for algebra, trigonometry, calculus,
matricies, linear equations.

**Calculator Edge**

calculatoredge.com

This has to be one of the Web's largest collection of unique (as opposed to copied)
online calculators. Each of these topics has many calculators within them. General, Civil Engineering, Optical Engineering, Mechanical Engineering,
Plastics Engineering, Metallurgy, Electronics Engineering, Electrical Engineering, Chemical Engineering, Physics, Ceramics, Oil & Gas, Structural
Engineering.

**CapCAD**

dilabs.com/applications/capcad.aspx

Capacitor calculation, by Dielectric Laboratories.

**Chemandy Electronics**

chemandy.com/calculators/calculator_index.htm

+62 31 8914627 / Jawa Timur, Indonesia

Large
selection of online interactive calculators for RF design, including attenuators, capacitance, resonance, RF traps, and microstrip impedance.
Design, development and small scale manufacture of simple RF and Audio items. We also have the capability for ATE programming in Labview, HP/Agilent
Vee or Visual Basic, and can produce associated test jigs.

**Chemistry Calculators**

1728.org/indexche.htm

Boyle's Law, Charles' Law, STP, molar volume, etc, by 1728 Software Systems.

**Choke Designer**

powerdesigners.com/InfoWeb/calculators/ChokeCalc/dc_choke.shtm

Inductor values using standard cores.

**Chris Gillings' Cardboard Slide Rule Collection**

chris.gillings.com/collect/slide

If you are at all nostalgic and also
are a nerd, then you will drool over this collection by Chris Gillings. Andrew Antenna and Propagation Computer, Andrew Parabolic Antenna System
Computer (1957), Andrew Parabolic Antenna System Computer (1964), Andrew Transmission Line Computer, BioMate, Blackwell Calculator, Althouse
Chemical Co., Marconi Signal Source Calculator, Motorcraft Gasculator, National Standard Company Strip Calculator, Proportion Wheel, Radiac,
No.1, Raytheon Radar Performance Calculator, Readymix Concrete Calculator, and many more. They're all here!

**CoilSim**

nathaniyer.com/images/coilsim.jpg

Basic ciol inductor calculator applet, by Nathan Iyer

**Coordinate System Converter**

random-science-tools.com/maths/coordinate-converter.htm

Convert between rectangular, polar,
spherical, and cylindrical coordinates.

**Connect802 Antenna System Designer**

connect802.com/antenna_c_main.php

An on-line calculator that creates a wireless
network antenna system design report based on various parameters that you provide. It will help you predict end-to-end performance and evaluate
your network design when you plan a point-to-point, or point-to-multipoint outdoor wireless network deployment. You'll be able to analyze the
radio link and tune network parameters for optimal link suitability.

**ConvertIt**

convertit.com

Huge collection of converters and calculators.

**Cubicle Quad Antenna Calculator**

softcom.net/users/kd6dks/quad.html

Determine dimensional quantities - javascript.

**Daycounter, Inc. Engineering Services**

daycounter.com/Calculators

Calculators for switching power supply, air core
inductors, Sallen-Key LP Butterworth filter, L matching network, standard resistor value, PI & T pad attenuator, reactance, series - parallel
impedance conversion, Z-S-Y parameter conversion, Rollet Stability (K) Factor, complete RF amplifier design & analysis, LC resonance.

**Dielectric Constant of Water (Complex)**

random-science-tools.com/electronics/water_dielectric.htm

Calculates the real
and imaginary parts of the dielectric constant for water, sung temperature, salinity, and frequency. By Gareth Harris

**DigSim**

embedded.eecs.berkeley.edu/research/weld/yoyodyne_demo_docs/DigSim/DigSim.html

Digital schematic editor &
simulator from Berkeley.

**Dirac Delta**

diracdelta.co.uk/science/source/c/a/calculations/source.html

"Science and engineering encyclopedia." Hundreds
of JavaScript calculators, definitions, historical information, etc.

**eCalc**

ecalc.com

Advanced features including support for complex numbers, unit conversion, base conversion, and has
a built in equation solver. eCalc is one of the best calculators on the web and runs completely in your browser without requiring any special
plugins. Electrical engineers will find eCalc's complex math especially useful since it supports both rectangular and polar formats. eCalc supports
both RPN and Algebraic Input Modes.

**engApplets**

engapplets.vt.edu

Java applets for engineering education.

**Engineering Calculators on Educypedia**

educypedia.be/electronics/electroniccalculatorrf.htm

A pretty good collection
of links to online calculators - satellites, attenuators, Smith Chart, VSWR, free space loss, etc.

**EIA Equipment Rack Stencils for Visio**

By Kirt Blattenberger.

**Electromagnetic Field Applets**

Very nice graphical output and user interface, with animation.

- **Wave propagation**

amanogawa.com/archive/PlaneWave/PlaneWave-2.html

- **Field Polarization**

amanogawa.com/archive/Polarization/Polarization-2.html

- **Oblique Incidence**

amanogawa.com/archive/Oblique/Oblique-2.html

- **Oblique Incidence on Lossy Medium**

amanogawa.com/archive/ObliqueLossy/ObliqueLossy-2.html

- **Parallel Plate Waveguide**

amanogawa.com/archive/ParallelWaveGuide/ParallelWaveGuide-2.html

- **Rectangular Waveguide**

amanogawa.com/archive/RectWaveGuide/RectWaveGuide-2.html

- **Dielectric Slab Waveguide**

amanogawa.com/archive/DielectricWaveGuide/DielectricWaveGuide-2.html

**everything RF**

everythingrf.com/rf-calculators

A nice collection of RF calculators.

- **Attenuator Calculator**

everythingrf.com/rf-calculators/attenuator-calculator

- **Microstrip Impedance Calculator**

everythingrf.com/rf-calculators/microstrip-calculator

- **Coax Impedance Calculator**

everythingrf.com/rf-calculators/coax-calculator

- **Cascaded Noise Figure Calculator**

everythingrf.com/rf-calculators/cascaded-noise-figure-gain-calculator

- **Skin Depth Calculator**

everythingrf.com/rf-calculators/skin-depth-calculator

- **Wavelength Calculator**

everythingrf.com/rf-calculators/wavelength-calculator

- **dBm to Watt Calculator**

everythingrf.com/rf-calculators/dbm-to-watts

- **Watt to dBm Calculator**

everythingrf.com/rf-calculators/watt-to-dbm

**Electric Field Units Converter**

compeng.com.au/emc_conversion_tables_field_strength_calculator.aspx

Online converter
by Compliance Engineering. Wavelength to frequency, V/m to dBuV/m V/m dBuV/m, dBm to dBuV/m (50Ω), mW/cm^2 to W/m^2 (Free Space), mW/cm^2 to
V/m (Free Space), mW/cm^2 to A/m (Free Space), mW/cm^2 to pJ/cm^2 (Free Space), W to dBm (50Ω), dBm to V (50Ω), V to dBm (50Ω)

**Excalibur RPN Calculator Applet**

freeware-guide.com/OldGoodFreeware/Excalibur.html

Excalibur does not use more conventional
"algebraic" notation like many low-end calculators on the market. Instead it uses the high-powered parenthesis-free RPN notation (Reverse Polish
Notation).

**Fast Fourier Transform Calculator**

random-science-tools.com/maths/FFT.htm

Do an FFT by entering the time domain data
in the Time Domain Data box with each sample on a new line. For complex (I and Q) data, the real and imaginary components should be on the same
line separated by a comma. Do an Inverse FFT by entering the frequency domain data in the Frequency Domain Data box with each sample on a new
line. For complex (I and Q) data, the real and imaginary components should be on the same line separated by a comma.

**Field Strength Calculator**

giangrandi.ch/electronics/anttool/field.html

Enter frequency and antenna gain, then any
one of received power, electric field strength, magnetic field strength, or power density and this calculates the others.

**Field Strength Calculator**

compeng.com.au/emc_conversion_tables_field_strength_calculator.aspx

V/m, dBuV/m, dBuA/m,
pT, dBpT, Tesla, Guass, A/m, mW/cm^2 & W/m^2. From Compliance Engineering.

**Filter Coupling Matrix Calculator**

gwtsoft.com

Facilitates synthesis of N+2 coupling matrices for Chebyshev bandpass
filtering functions, with arbitrary finite-position transmission zeroes.

**Filter Design SpreadsheetsWaveguide Filter Designer**

rfshop.com.au/portals/22/supp/wgfil2.xls

rfshop.com.au/portals/22/supp/c&i2.xls

rfshop.co.uk

**Financial & Mortgage Calculators**

mortgageloan.com/calculator

Over 100 personal finance calculators.

**Financial Calculators**

1728.org/indexfin.htm

Loan amortization, interest, loan payment by 1728 Software Systems.

**FM Antenna Calculator**

eriantennas.com/AntennaCalculator/FMCalca.htm

by ERI (Electronics Research, Inc.)

Plots FCC
60 dBu contours right on the page. Also many PDF files with Engineering Tables: Geotechnical Investigations for Antenna Support Structures,
Classes of FM Stations, FM Broadcast Channels, AM Tower Heights by Frequency, 54 dBu Contour Distances, 60 dBu Contour Distances, Site Plot
Plan, Wind Speed Map, Ice Probability Map, Antenna Support Structure Design Radius of Curvature Requirement.

**Free-Space Loss Calculator**

e-zy.net/calculations/freespaceloss

Other calculators for

- **Fresnel Clearance
Zone**

e-zy.net/calculations/fresne

- **EIRP**

e-zy.net/calculations/eirp

- **Distance between two points
using**

e-zy.net/calculations/distance

- **Latitudes and Longitudes**

e-zy.net/calculations/distance

**Flex Analysis**

rogers-corp.com/cmu/flexform.htm

Evaluate thermal/mechanical performance of flex circuits by Rogers
Corporation.

**Frequency Finder - Open TV Channel Applet**

sennheiserusa.com/frequencyfinder

Sennheiser searches the FCC database for
an open channel for running interference-free wireless systems.

**Fresnel Clearance Zone Calculator**

terabeam.com/support/calculations/fresnel-zone.php

By TeraBeam

**Fresnel Zone Calculator**

wirelessconnections.net/calcs/FresnelZone.asp

The calculator will generate the radius of the
first Fresnel zone only (at the obstacle point or the mid-point), the 60% (no obstacle) radius and the height of the earth curvature at the
mid-point of the Total link distance. By Wireless Connections.

**HiDigit**

binarythings.com/hidigit

Scientific calculator with extended capabilities. Advantages include a simple input
format even for the most complicated scientific formulas; i.e., enter "10pi" instead of "10*pi" or complex numbers as "1+2i".

**HP48 Calculator Programs**

hpcalc.org/hp48/science/electricity

Lots of engineering programs.

**Impedance Matching Network Designer**

sandiego.edu/~ekim/e194rfs01/jwmatcher

John Wetherell, Berkeley, CA.

**Inflation Calculator**

westegg.com/inflation

U.S., Canadian, and Italian versions. Enter begin and end dates and get
equivalent dollar values,

by S. Morgan Friedman.

**J-Pole Antenna Calculator**

hamuniverse.com/jpole.html

Enter the operating frequency and calculate antenna dimensions
- online.

**Julian Date Calculator**

1728.com/calendar.htm

Calculates JDs for a given month.

**Karnaugh Minimizer**

karnaugh.shuriksoft.com

A tool for developers of small digital devices and radio amateurs, also
for those who is familiar with Boolean algebra and Karnaugh Map optimization method, best suits for electrical engineering students. By Shurik
Soft.

**LC Filter Designer**

www-users.cs.york.ac.uk/~fisher/lcfilter

This is an interactive design package for designing analogue
(i.e. hardware) filters made of inductors and capacitors (Ls and Cs). From University of York.

**Link Budget Calculator**

wirelessconnections.net/calcs/BudgetCalc.asp

A tower-to-tower, over-the-air JavaScript calculator,
by Wireless Connections.

**LOGInterMod**

logbook.freeserve.co.uk

Leslie Green / U.K.

A Windows program (Freeware) that calculates two-tone intermodulation
products up to the 30th order.

**Look Angle Calculator**

intelsat.com/resources/satellitedata-pas/calc-look-angle.asp

Use our look angle calculator to
calculate the pointing angles your dish needs in order to receive a particular satellite.

**Martindale's Calculator On-Line Center**

martindalecenter.com/Calculators.html

More than 20,000 calculators - this site
has grown incredibly over the years.

**Math eBook**

mathebook.net

This website is fully interactive and will allow kids to practice and learn math with ease.
It is designed to help students of different grades, starts from Kindergarten, Elementary, Middle School and High School Math. The goal of this
website is to provide new education tools to teachers, parents and off course students who can benefit from it. Mathebook.net has Online Tutorials
as well as Downloadable pdf tutorials.

**MegaConverter2**

megaconverter.com/mega2

Multifunctional units converter.

**Microwave Calculator **

jfwindustries.com/RF_Conv_Sign_up.htm

Free From JFW Industries.

**Microwave Impedance Calculator** (MWIJ 1.0)

rogerscorp.com/acm/technology

Substrate line impedance calculator by Rogers
Corporation. Written in Java - nice.

**Mixer Spur Calculator**

hittite.com/tools/Spurcalc/SpurCalc25JarLockE.htm

By Hittite Microwave.

**Mortgage Calculators**

mortgagecalculator.org/calculators

Large variety of financial calculators for mortgages, principal
calculation, cost per thousand, affordability, income requirements, FHA, refinance, HELOC, loan comparison tools, points, rent vs buy, &
more.

**Mortgage Calculator**

mortgagecalculator.net

8 different calculators: Mortgage calculator, Affordability, Early Pay-Off,
Interest Only, Advanced Mortgage calculator, Mortgage Refinance, Basic Amortization, and Comparison calculator

**N Calculators**

ncalculators.com/electronics

Electronic circuit design calculators can assist you to solve, analyze
and determine the circuit design with capacitors, inductors, resistors, diodes, transistors, etc. Many other types of financial, mathematical,
and science calculators.

**Online Conversion**

onlineconversion.com

Convert just about anything to just about anything else.

**PCB Trace & Via Calculator**

skottanselektronik.com

A very complete set of online calculators for microstrip, embedded,
and differential microstrip impedance; stripline and differential stripline impedance; stripline and microstrip crosstalk; current-carrying
capacity of traces and thermal vias; heat dissipation of thermal vias. By Sören Nilsson.

**PCB Trace Width **

geocities.com/CapeCanaveral/Lab/9643/TraceWidth.htm

Conductor thickness, ampacity, temperature rise.

**PCB Trace Impedance Calculator**

emclab.mst.edu/pcbtlc2

Online interactive calculator for stripline and microstrip,
by U. of Missouri-Rolla EMC Lab.

**PDA Calculator Software **

adacs.com/menu/PDAcalc_matrix.php

ADACS has a nice collection of software for engineering,
scientific and financial applications.

**PLL Phase Noise Calculator **

hittite.com/tools/PLLCalc/PLLCalc.htm

By Hittite Microwave.

**Poles & Zeros Calculator**

thole.org/manfred/polezero/en_idx.html

Move the poles and zeros to see the frequency
domain response.

**Power Calculator**

macgen.com/calcul.html

Motor & line calculations, conversions.

**Power Dissipation vs. Die Temperature Calculator **

analog.com/Analog_Root/static/techSupport/designTools/interactiveTools/powertemp/powertemp.html

By Analog Devices.

**Power Switch Designer**

fairchildsemi.com/products/analog/fps_designer_software.zip

By Fairchild Semiconductor.

**Power Supply**

national.com/appinfo/power

National's power supply design tool.

**Power & Voltage Converter**

giangrandi.ch/electronics/anttool/decibel.html

Convert between units of dBm, dBW, watts,
dBV, volts.

**Radiated Power Calculator**

compeng.com.au/emc_conversion_tables_power_calculator.aspx

ERP, EIRP, dBuV/m, dBm &
mW. From Compliance Engineering.

**Radiated Power Converter**

compeng.com.au/emc_conversion_tables_power_calculator.aspx

Online converter by Compliance
Engineering.

EIRP (mW) to ERP (mW) to dBuV/m @ 3m to dBuV/m @ 10m.

**Radio Calculators**

qsl.net/wa2whv/radiocalcs.shtml

Pi attenuators and air inductor java calculators by Jim Hawkins.

**Random Science Tools and Calculators**

random-science-tools.com/index.html

The intention of this site is to produce
scientific tools and calculators, and store information which will be useful to scientists, engineers, students and enthusiasts.**
Chemistry**

random-science-tools.com/chemistry/index.htm**Electronics**

random-science-tools.com/electronics/index.html

**Math**

random-science-tools.com/maths/index.htm**Physics**

random-science-tools.com/physics/index.htm

**Resistor Color Code Calculator (Reversible)**

searchingtabs.com/rcolor/rescolor.htm

This resistor color code calculator
also provides a table of nearest standard values of resistors for standard tolerances.

**Resistor Ratio Calculator**

usna.edu/Users/ee/cameronc/Tutorials/ResistorRatio.html

Finds R1/R2 combinations using standard
resistor values, by Bennet Blake.

**Resistor Ratio Calculator**

logbook.freeserve.co.uk

Leslie Green / U.K.

A resistive network calculator for problems
using two or three fixed resistors. You have to use standard values, but you need some silly ratio like 3.245 V from a 10 V source. This program
helps you to pick the optimum resistor values for simple resistor dividers or opamps (inverting and non-inverting). Freeware.

**RF Cafe Online Calculators**

Many online calculators for noise
figure/temperature, filter responses, voltage dividers, waveguide cutoff frequency, VSWR-return loss-reflection coefficient conversions and
more, by Kirt Blattenberger.

**RF Calc**

milmega.co.uk/downloads/rfcalc.exe

General purpose engineering calculator by MilMega - includes table of physical
constants, component parameter calculators (capacitance, inductance, resonance, pads), multiple transmission line calculators.

**RF Calculator**

compeng.com.au/emc_conversion_tables_rf_calculator2.aspx

Wavelength, dBm, dBuV, W, dBuV/m, mW/cm^2,
pJ/cm^2, V & VSWR. From Compliance Engineering.

**RF & Analog Tutorials w/Java Apps Website**

amanogawa.com

This is a VERY nice collection of Java applets and some
PDF format tutorials. Antenna patterns, waveguide modes, electromagnetic wave fronts, interactive Smith chart, transmission lines, standing
waves, resonant circuits, radiation of wires, cross-talk, much more. By Amanogawa.

**RF Calculators**

fcc.gov/mb/audio/bickel/findvalues.html

On the Federal Communications Commission website.

**RF Calculators**

phasematrix.com/Microwave_Components/components_webapps.html

by Phase Matrix, San Jose, CA

Here
is a very nice collection of interactive calculators: Tee & Pi Attenuators, Power to Voltage in a 50 ohm system, Converting dB to
Ratio, mW to dBm, dBW, dBV & Volts in a 50 ohm system, Converting Phase Noise To Jitter (Part 1), Reflectometers Conversions: Interconverting
VSWR, Return Loss, Reflection Coefficient and Mismatch Loss ,Designing Equal or Unequal Split Wilkinson Power Dividers, Cascading Three Stages
for Gain, NF & P-1 dB, VSWR Mismatch Analysis and Power Uncertainty, Measuring Oscillator Output VSWR using Power Load Pulling, Microstrip
Line Design, Designing Unequal Resistive Power Dividers/Couplers.

**RF Cascade Workbook 2003**

RF, system,
cascade for Excel spreadsheet.

**RF Cascade Workbook 2004**

RF, system,
cascade for Excel spreadsheet.

**RF Cascade Workbook 2005**

RF,
system, cascade for Excel spreadsheet.

**RF Workbench**

RF, system, up/downconverter,
spurious analysis, budget - best value out there.

**RLC Tuned Circuit Calculator**

cvs1.uklinux.net/calculators

Enter values for R, L, C, and/or frequency and it calculates
the others. Also calculate capacitor and inductor impedance. Ohm's Law and RC time constant calculator.

**RPN Calculator**

This handy Reverse Polish Notation calculator was written by the infamous Kelly
Painter. Note the logo in the upper right corner (hover your cursor over it).

**RW Calc Software**

radiowavesinc.com/cgi-bin/index.cgi/Technical+Stuff/RW+ToolBox+Software+Series

Free from RadioWaves,
several RF utilities, such as converters, far-field calculation, Fresnel zone clearance and free space propagation.

**Sage Notebook**

sagenb.org

Spreadsheets for many realms of science and engineering. All are free downloads

**Satellite-Related Calculators**

satellite-calculations.com

Sun interference, power-to-noise, tilt angle, antenna gain
and more than thirty other calculators.

**Satellite Link Budget Calculator**

satsig.net/linkbugt.htm

Uplink/downlink calculator, Satellite Signals site.

Signals & Noise

users.ece.gatech.edu/users/gtz/java

Java applet for exploring random processes.

**Smith Chart for
Visio**

By Kirt Blattenberger.

**Sunshine Design Engineering Services**

astrocalculator.com

Ramona, CA

Design specialties - hardware, CAD and software
engineering. Test Engineering Services - 20 years experience RF/Microwave and Semiconductor Parametric Test. Electronic Calculator - Multiple
pages of calculators for capacitance, resistance, inductance, attenuation, microstrip, resonance, etc. Many astronomical calculators.

**SWR Calculator**

vnahelp.com/swrcalc_screen.html

VNA Help - for microwave network analyzers.

**Toroid Calculator**

chemeng.ed.ac.uk/people/jack/radio/design_toroid.html

Uses standard cores; e.g., T-50.

**Tower Planner**

awapps.commscope.com/downloads/towerplanner/default.aspx

Andrew's handy calculator for height, wind
speed, terrain, etc.

**Transmission Line Calculator**

circuitcalculator.com/wordpress/2007/03/06/transmission-line-calculator

The CircuitCalculator.com
Website

Excel-based calculator

**Transmission Line Calculator**

fermi.la.asu.edu/w9cf/tran/index.html

By Kevin Schmit, W9CF

**TRL / LRL Calculator**

TRL (Through,
Reflect, Line) and LRL (Line, Reflect, Line) reference plane calculators provided by Electro-Photonics.

**TXLine**

Transmission Line Calculator by Applied
Wave Research. This file seems to be no longer available on the AWR website.

**Ultra Converter I**

1728.org/convert.htm

**Ultra Converter II**

1728.org/convert2.htm

If these to converters don't have it, you don't need to convert it! by 1728
Software.

**Vertex 42** - **Engineering calculators & converter applets &
spreadsheets. **

**Excel templates**

vertex42.com/ExcelTemplates**financial calculators**

vertex42.com/Calculators/financial-calculators.html**calendars**

vertex42.com/calendars

We also host**The Excel Nexus**

vertex42.com/ExcelLinks

The ultimate directory of 3rd-party Microsoft Excel® resources, including add-ins, templates, tutorials, and consulting services.

**Virtual Slide Rules**

**Standard slide rule**

engcom.net/component/option,com_sliderule/Itemid,73

EngCom.net**Pickett slide rule**

antiquark.com/sliderule/sim/virtual-slide-rule.html

Antiquark.com

**Voltage Divider Resistor Calculator**

web.ics.purdue.edu/~mrushako/resistor_table.html

Table of two-resistor voltage
dividers using standard 5% tolerance resistor. Opamp feedback-input resistor pairs can also be specified. Very clever cell shading scheme for
indicating deviation from exact ratio that is specified. Provided by Mark Rushakoff.

**VSWR Calculator**

bessernet.com/Ereflecto/tutorialFrameset.htm

Animated version from BesserNet.

**VSWR, Power Converter, Inductance Calculator**

mw-elisra.com/FreeEngineeringSoftware/free_engineering_software.htm

972-3-6175082
/ Israel

Free downloadable VSWR, power converter, inductance calculator, written by Dr. Ronen Holtzman for Elisra Microwave Division engineers.

**Waveguide Filter Dimension and Electrical Response Calculator**

guidedwavetech.com

By Guided Wave Technology.

**Waveguide Applets**

Very nice graphical output and user interface, with animation.

**Parallel Plate Waveguide**

amanogawa.com/archive/ParallelWaveGuide/ParallelWaveGuide-2.html**Rectangular Waveguide**

amanogawa.com/archive/RectWaveGuide/RectWaveGuide-2.html**Dielectric Slab Waveguide**

amanogawa.com/archive/DielectricWaveGuide/DielectricWaveGuide-2.html

**Web Cool Tools**

webcooltools.com/engineeringdesigntool.shtml

RF & microwave design applets that use numerical input
or sliders for setting parameters.

**WR-Connect**

goulouev.com/connector/index.htm

Waveguide structure design tool.

Corrugated Low-Pass Filter Design
Workshop.

goulouev.com/oncorr/index.htm

**Waveguide & EM Calculators**

amanogawa.com/waves.html

This is a very nice Java/JavaScript-based set of calculators
with a great user interface.

**Wireline Calculator**

**WiseCalc**

wisecalc.com

WiseCalc is the complete mathematical text engine calculator for your computer.

- it's FREE!

- it has a multi-line text-editor type of interface

- it has 450+ unit conversions built-in

- it has hundreds of functions built-in

- it can save and open calculation pages

- it can evaluate built-in and user definable functions,

units, constants, and matrices

**WLAN Link Planning Calculators**

swisswireless.org/wlan_calc_en.html

Many calculators for wireless link planning: Fresnel
zone, diffraction, path loss, link budget, cable loss.

**Yagi Java Applet**

fermi.la.asu.edu/w9cf/yagipub/index.html

Change frequency, element diameter, and number of segments.