AccelWare 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
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.
Analog Devices
Calculators
Big list of online calculators
Antenna System Evaluator Evaluate
consequences of SWR & feedline losses, KD6DKS.
ATC TechSelect Capacitor
Calculation, American Technical Ceramics.
Attenuator Calculators "T" and
Pi topologies using online interactive Excel OWA technology.
Attenuator Calculator
Four topologies: "T", Pi, BridgedT, Reflection.
Attenuator Calculator
DK1RM Here is a JavaScript version for Pi and T attenuators  auf Deutsch.
Attenuators
Minimum loss attenuator design.
Besser Associates 4159493300 / Los
Altos, CA
Broadcast Engineering Related Calculators
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
Calculate loss & power, VSWR & return loss, by Times Microwave.
Calc101 By webMathematica, scores of online
interactive calculators for algebra, trigonometry, calculus, matricies, linear equations.
Calculator Edge 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 Capacitor calculation, by Dielectric
Laboratories.
Chemandy Electronics
+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 Boyle's Law,
Charles' Law, STP, molar volume, etc, by 1728 Software Systems.
Choke Designer
Inductor values using standard cores.
Coordinate System
Converter Convert between rectangular, polar, spherical, and cylindrical coordinates.
Connect802 Antenna System Designer
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 Huge collection of converters and
calculators.
Daycounter, Inc. Engineering Services
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) Calculates the real and imaginary parts of the dielectric constant for water, sung temperature,
salinity, and frequency. By Gareth Harris
Dirac Delta
"Science and engineering encyclopedia." Hundreds of JavaScript calculators, definitions, historical information, etc.
eeWeb 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 Java applets for engineering
education.
Engineering Calculators
on Educypedia 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
 Field Polarization
 Oblique Incidence
 Oblique Incidence
on Lossy Medium 
Parallel Plate Waveguide
 Rectangular Waveguide
 Dielectric
Slab Waveguide
everything RF A nice collection
of RF calculators.  Attenuator Calculator 
Microstrip Impedance Calculator
 Coax Impedance Calculator
 Cascaded
Noise Figure Calculator 
Skin Depth Calculator
 Wavelength Calculator
 dBm to Watt Calculator
 Watt to dBm Calculator
Excalibur RPN Calculator
Applet 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
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
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.
Filter Coupling Matrix Calculator Facilitates
synthesis of N+2 coupling matrices for Chebyshev bandpass filtering functions, with arbitrary finiteposition transmission
zeroes.
Filter Design Spreadsheets Waveguide
Filter Designer Combline
and Interdigital Filter Design Spreadsheet RF
Shop
Financial & Mortgage Calculators
Over 100 personal finance calculators.
Financial Calculators Loan amortization,
interest, loan payment by 1728 Software Systems.
FM Antenna Calculator
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
Fresnel Clearance Zone
EIRP
Distance between two points using Latitudes and Longitudes
Flex Analysis Evaluate
thermal/mechanical performance of flex circuits by Rogers Corporation.
Frequency Finder  Open TV Channel Applet
Sennheiser searches the FCC database for an open channel for running interferencefree wireless systems.
Fresnel Clearance Zone
Calculator By TeraBeam
Fresnel Zone Calculator
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 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
Lots of engineering programs.
Impedance Matching Network Designer
John Wetherell, Berkeley, CA.
Inflation Calculator U.S., Canadian,
and Italian versions. Enter begin and end dates and get equivalent dollar values, by S. Morgan Friedman.
Inflation Calculator
U.S. Bureau of Labor Statistics (BLS).
JPole Antenna Calculator Enter
the operating frequency and calculate antenna dimensions  online.
Julian Date Calculator Calculates
JDs for a given month.
Link Budget Calculator
A towertotower, overtheair JavaScript calculator, by Wireless Connections.
LOGInterMod Leslie Green / U.K.
 A Windows program (Freeware) that calculates twotone intermodulation products up to the 30th order.
Martindale's Calculator OnLine Center
More than 20,000 calculators  this site has grown incredibly over the years.
MegaConverter2 Multifunctional units
converter.
Microwave Impedance Calculator
(MWIJ 1.0) Substrate line impedance calculator by Rogers Corporation. Written in Java  nice.
Mortgage 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 8 different calculators:
Mortgage calculator, Affordability, Early PayOff, Interest Only, Advanced Mortgage calculator, Mortgage Refinance, Basic
Amortization, and Comparison calculator
N Calculators 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.
Noise Figure <> Noise Temperature
Calculator
Online Conversion Convert just about
anything to just about anything else.
PCB Trace & Via Calculator 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.
PLL Phase Noise Calculator
By Hittite Microwave (now Analog Devices).
Poles & Zeros Calculator
Move the poles and zeros to see the frequency domain response.
Power Calculator Motor & line
calculations, conversions.
Radio Calculators Pi attenuators
and air inductor java calculators by Jim Hawkins.
Random Science Tools and Calculators
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
Electronics
Math
Physics
Resistor Color Code Calculator (Reversible)
This resistor color code calculator also provides a table of nearest standard values of resistors for standard tolerances.
Resistor Ratio Calculator 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 General purpose
engineering calculator by MilMega  includes table of physical constants, component parameter calculators (capacitance,
inductance, resonance, pads), multiple transmission line calculators.
RF & Analog Tutorials w/Java Apps Website
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 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.
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).
SatelliteRelated Calculators
Sun interference, powertonoise, tilt angle, antenna gain and more than thirty other calculators.
Satellite Link Budget Calculator
Uplink/downlink calculator, Satellite Signals site.
Signals & Noise Java applet
for exploring random processes.
Smith Chart for Visio By Kirt Blattenberger.
Sunshine Design Engineering Services
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 VNA Help
 for microwave network analyzers.
Transmission Line Calculator The CircuitCalculator.com Website Excelbased calculator
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
Ultra Converter II 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.
Voltage Divider Resistor
Calculator 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,
Power Converter, Inductance Calculator 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
By Guided Wave Technology. Waveguide Applets Very nice graphical output and user interface, with
animation.
Web Cool Tools
RF & microwave design applets that use numerical input or sliders for setting parameters.
WRConnect Waveguide structure
design tool.
Corrugated LowPass Filter Design Workshop
Waveguide & EM Calculators
This is a very nice Java/JavaScriptbased set of calculators with a great user interface.
Wireline Calculator
WLAN Link Planning Calculators
Many calculators for wireless link planning: Fresnel zone, diffraction, path loss, link budget, cable loss.
Yagi Java Applet
Change frequency, element diameter, and number of segments.
