These calculators are offered free of
charge  some by vendors and others by individuals. Some are standalone 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 and vintage
Cardboard Slide Rule Calculators.
A good way to find on this page what you need is do a browser page search.
AccelWare accelware.com Unit Conversion Tool  powerful, intuitive, and easytouse 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 qpar.com/capabilities/software/microwaveantennacalcinstructions
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 Qpar 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.
ATC QuickCalc atceramics.com/designsupport Capacitor Calculation, American Technical Ceramics.
Attenuator Calculators rfcafe.com/references/spreadsheets/attencalcss.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, BridgedT, Reflection.
Attenuator Calculator http://www.phasematrix.net/phasematrix/rfdesigntools/teeapiattenuatorcalculator
Very nicely done online interactive calculator  by Microwaves & RF, Paul Khanna of Phase Matrix
Attenuator Calculator db0smg.afug.unigoettingen.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=bfhome&trurl=http://db0smg.afug.unigoettingen.de/~dk1rm/tools/index.html&lp=de_en&btnTrUrl=Translate
Other calculators available by clicking on the Tools db0smg.afug.unigoettingen.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 4159493300 / Los Altos, CA
Reflectometer bessernet.com/Ereflecto/tutorialFrameset.htm Butterworth Filter Designer
bessernet.com/Ebutterworth/tutorialFrameset.htm dBmtodbW 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 randomsciencetools.com/maths/coordinateconverter.htm Convert between
rectangular, polar, spherical, and cylindrical coordinates.
Connect802 Antenna System Designer connect802.com/antenna_c_main.php An online calculator that
creates a wireless network antenna system design report based on various parameters that you provide. It will help you predict
endtoend performance and evaluate your network design when you plan a pointtopoint, or pointtomultipoint 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, SallenKey LP Butterworth filter, L matching network, standard resistor value, PI & T pad
attenuator, reactance, series  parallel impedance conversion, ZSY parameter conversion, Rollet Stability (K) Factor,
complete RF amplifier design & analysis, LC resonance.
Dielectric Constant of Water (Complex) randomsciencetools.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.
EIA Tube Bases for Visio
Electromagnetic Field Applets Very nice graphical output and user interface, with animation. 
Wave propagation amanogawa.com/archive/PlaneWave/PlaneWave2.html  Field Polarization
amanogawa.com/archive/Polarization/Polarization2.html  Oblique Incidence amanogawa.com/archive/Oblique/Oblique2.html
 Oblique Incidence on Lossy Medium amanogawa.com/archive/ObliqueLossy/ObliqueLossy2.html 
Parallel Plate Waveguide amanogawa.com/archive/ParallelWaveGuide/ParallelWaveGuide2.html 
Rectangular Waveguide amanogawa.com/archive/RectWaveGuide/RectWaveGuide2.html  Dielectric
Slab Waveguide amanogawa.com/archive/DielectricWaveGuide/DielectricWaveGuide2.html
everything RF everythingrf.com/rfcalculators A nice collection of RF calculators. 
Attenuator Calculator everythingrf.com/rfcalculators/attenuatorcalculator  Microstrip
Impedance Calculator everythingrf.com/rfcalculators/microstripcalculator  Coax Impedance Calculator
everythingrf.com/rfcalculators/coaxcalculator  Cascaded Noise Figure Calculator everythingrf.com/rfcalculators/cascadednoisefiguregaincalculator
 Skin Depth Calculator everythingrf.com/rfcalculators/skindepthcalculator  Wavelength
Calculator everythingrf.com/rfcalculators/wavelengthcalculator  dBm to Watt Calculator
everythingrf.com/rfcalculators/dbmtowatts  Watt to dBm Calculator everythingrf.com/rfcalculators/watttodbm
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 freewareguide.com/OldGoodFreeware/Excalibur.html Excalibur does
not use more conventional "algebraic" notation like many lowend calculators on the market. Instead it uses the highpowered
parenthesisfree RPN notation (Reverse Polish Notation).
Fast Fourier Transform Calculator randomsciencetools.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 finiteposition transmission zeroes.
Filter Design Spreadsheets Waveguide Filter Designer rfshop.com.au/portals/22/supp/wgfil2.xls
Combline and Interdigital Filter Design Spreadsheet rfshop.com.au/portals/22/supp/c&i2.xls
RF Shop 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.
FreeSpace Loss Calculator ezy.net/calculations/freespaceloss Other calculators for 
Fresnel Clearance Zone ezy.net/calculations/fresne  EIRP ezy.net/calculations/eirp
 Distance between two points using ezy.net/calculations/distance  Latitudes and Longitudes
ezy.net/calculations/distance
Flex Analysis rogerscorp.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 interferencefree wireless systems.
Fresnel Clearance Zone Calculator terabeam.com/support/calculations/fresnelzone.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 midpoint), the 60% (no obstacle) radius and the
height of the earth curvature at the midpoint 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.
JPole 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 wwwusers.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 towertotower, overtheair
JavaScript calculator, by Wireless Connections.
LOGInterMod logbook.freeserve.co.uk Leslie Green / U.K. A Windows program (Freeware) that calculates
twotone intermodulation products up to the 30th order.
Look Angle Calculator intelsat.com/resources/satellitedatapas/calclookangle.asp Use our look
angle calculator to calculate the pointing angles your dish needs in order to receive a particular satellite.
Martindale's Calculator OnLine 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 PayOff, 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; currentcarrying 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 MissouriRolla 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 randomsciencetools.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 randomsciencetools.com/chemistry/index.htm Electronics
randomsciencetools.com/electronics/index.html Math randomsciencetools.com/maths/index.htm
Physics randomsciencetools.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 noninverting). Freeware.
RF Cafe Online Calculators Many online
calculators for noise figure/temperature, filter responses, voltage dividers, waveguide cutoff frequency, VSWRreturn lossreflection
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, crosstalk, 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 & P1 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/cgibin/index.cgi/Technical+Stuff/RW+ToolBox+Software+Series
Free from RadioWaves, several RF utilities, such as converters, farfield calculation, Fresnel zone clearance and free space
propagation.
Sage Notebook sagenb.org Spreadsheets for many realms of science and engineering. All are free
downloads
SatelliteRelated Calculators satellitecalculations.com Sun interference, powertonoise, 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.,
T50.
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/transmissionlinecalculator
The CircuitCalculator.com Website Excelbased 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 ElectroPhotonics.
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/financialcalculators.html
 calendars
vertex42.com/calendars We also host
 The Excel Nexus
vertex42.com/ExcelLinks The ultimate directory of 3rdparty Microsoft Excel®
resources, including addins, 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/virtualsliderule.html Antiquark.com
Voltage Divider Resistor Calculator web.ics.purdue.edu/~mrushako/resistor_table.html Table of
tworesistor voltage dividers using standard 5% tolerance resistor. Opamp feedbackinput 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 mwelisra.com/FreeEngineeringSoftware/free_engineering_software.htm
97236175082 / 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/ParallelWaveGuide2.html
 Rectangular Waveguide
amanogawa.com/archive/RectWaveGuide/RectWaveGuide2.html
 Dielectric Slab Waveguide
amanogawa.com/archive/DielectricWaveGuide/DielectricWaveGuide2.html
Web Cool Tools webcooltools.com/engineeringdesigntool.shtml RF & microwave design applets
that use numerical input or sliders for setting parameters.
WRConnect goulouev.com/connector/index.htm Waveguide structure design tool. Corrugated LowPass
Filter Design Workshop. goulouev.com/oncorr/index.htm
Waveguide & EM Calculators amanogawa.com/waves.html This is a very nice Java/JavaScriptbased
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 multiline texteditor type of interface  it has 450+ unit conversions builtin
 it has hundreds of functions builtin  it can save and open calculation pages  it can evaluate builtin 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.
