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 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. This is a nice assortment (83 at this time) of electrical & electronics parameter calculators, with a couple mechanical types as well. There are many types of substrate impedance and line dimension calculators, and calculators for voltage dividers, inductance and capacitance, coax lines and waveguides, amplifiers, impedance matching, free space loss, EIRP, radar range, and noise figure.
A very nice graphical interface tools that enables you500彩票手机快三在线投注 to compare manufacturers, while taking into account the terrain of you500彩票手机快三在线投注r 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.
Big list of online calculators Evaluate consequences of SWR & feedline losses, KD6DKS.
Capacitor Calculation, American Technical Ceramics.
Four topologies: "T", Pi, BridgedT, Reflection.
DK1RM Here is a JavaScript version for Pi and T attenuators  auf Deutsch.
Minimum loss attenuator design.
4159493300 / Los Altos, CA
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
Calculate loss & power, VSWR & return loss, by Times Microwave.
By webMathematica, scores of online interactive calculators for algebra, trigonometry, calculus, matricies, linear equations.
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.
Capacitor calculation, by Dielectric Laboratories.
+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.
Boyle's Law, Charles' Law, STP, molar volume, etc, by 1728 Software Systems.
Inductor values using standard cores.
Convert between rectangular, polar, spherical, and cylindrical coordinates.
An online calculator that creates a wireless network antenna system design report based on various parameters that you500彩票手机快三在线投注 provide. It will help you500彩票手机快三在线投注 predict endtoend performance and evaluate you500彩票手机快三在线投注r network design when you500彩票手机快三在线投注 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.
Huge collection of converters and 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.
Calculates the real and imaginary parts of the dielectric constant for water, sung temperature, salinity, and frequency. By Gareth Harris
"Science and engineering encyclopedia." Hundreds of JavaScript calculators, definitions, historical information, etc.
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 you500彩票手机快三在线投注r 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.
Java applets for engineering education.
A pretty good collection of links to online calculators  satellites, attenuators, Smith Chart, VSWR, free space loss, etc.
     
A nice collection of RF calculators.        
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).
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.
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.
Facilitates synthesis of N+2 coupling matrices for Chebyshev bandpass filtering functions, with arbitrary finiteposition transmission zeroes.
Filter Design Spreadsheets
Over 100 personal finance calculators.
Loan amortization, interest, loan payment by 1728 Software Systems.
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.
Evaluate thermal/mechanical performance of flex circuits by Rogers Corporation.
Sennheiser searches the FCC database for an open channel for running interferencefree wireless systems.
By TeraBeam
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.
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".
Lots of engineering programs.
Huge collection of online calculators for tax, finance, math, engineering, mortgages, logistics, loans, budgets, conversions, sports & health, statistics, mechanics, and other topics.
John Wetherell, Berkeley, CA.
U.S., Canadian, and Italian versions. Enter begin and end dates and get equivalent dollar values, by S. Morgan Friedman.
U.S. Bureau of Labor Statistics (BLS).
Enter the operating frequency and calculate antenna dimensions  online.
Calculates JDs for a given month.
A towertotower, overtheair JavaScript calculator, by Wireless Connections.
Leslie Green / U.K.  A Windows program (Freeware) that calculates twotone intermodulation products up to the 30th order.
More than 20,000 calculators  this site has grown incredibly over the years.
Multifunctional units converter.
(MWIJ 1.0) Substrate line impedance calculator by Rogers Corporation. Written in Java  nice. 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.
8 different calculators: Mortgage calculator, Affordability, Early PayOff, Interest Only, Advanced Mortgage calculator, Mortgage Refinance, Basic Amortization, and Comparison calculator
Electronic circuit design calculators can assist you500彩票手机快三在线投注 to solve, analyze and determine the circuit design with capacitors, inductors, resistors, diodes, transistors, etc. Many other types of financial, mathematical, and science calculators.
Convert just about anything to just about anything else.
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.
By Hittite Microwave (now Analog Devices).
Move the poles and zeros to see the frequency domain response.
Motor & line calculations, conversions.
Pi attenuators and air inductor java calculators by Jim Hawkins.
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.
This resistor color code calculator also provides a table of nearest standard values of resistors for standard tolerances.
Leslie Green / U.K. A resistive network calculator for problems using two or three fixed resistors. You have to use standard values, but you500彩票手机快三在线投注 need some silly ratio like 3.245 V from a 10 V source. This program helps you500彩票手机快三在线投注 to pick the optimum resistor values for simple resistor dividers or opamps (inverting and noninverting). Freeware.
General purpose engineering calculator by MilMega  includes table of physical constants, component parameter calculators (capacitance, inductance, resonance, pads), multiple transmission line calculators.
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 2018 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 you500彩票手机快三在线投注r cursor over it). Sun interference, powertonoise, tilt angle, antenna gain and more than thirty other calculators.
Uplink/downlink calculator, Satellite Signals site.
Java applet for exploring random processes.
Smith Chart for Visio By Kirt Blattenberger. Ramona, CA Design specialties  hardware, CAD and software engineering. Test Engineering 500彩票手机快三在线投注  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.
VNA Help  for microwave network analyzers.
The CircuitCalculator.com Website Excelbased calculator
TRL (Through, Reflect, Line) and LRL (Line, Reflect, Line) reference plane calculators provided by ElectroPhotonics.
If these to converters don't have it, you500彩票手机快三在线投注 don't need to convert it! by 1728 Software.
This is a very extensive measurement value and units converter for length, weight, height, area, temperature, time, pressure, speed, force, etc. Each and every converter has a detailed explanation with an example.
 Engineering calculators & converter applets & spreadsheets.
The ultimate directory of 3rdparty Microsoft Excel® resources, including addins, templates, tutorials, and consulting services.
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.
97236175082 / Israel Free downloadable VSWR, power converter, inductance calculator, written by Dr. Ronen Holtzman for Elisra Microwave Division engineers.
By Guided Wave Technology. Waveguide Applets Very nice graphical output and user interface, with animation.
RF & microwave design applets that use numerical input or sliders for setting parameters.
Waveguide structure design tool.
This is a very nice Java/JavaScriptbased set of calculators with a great user interface. Wireline Calculator
Many calculators for wireless link planning: Fresnel zone, diffraction, path loss, link budget, cable loss.
Change frequency, element diameter, and number of segments.
