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!!
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.
Antenna System Planner awapps.commscope.com/downloads/amsp/ By Andrew Corporation.
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 electrophotonics.com/index.php?l=page_view&p=TRL 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 vertex42.com
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.
