
Omni Calculator
calculator.net
Calculate Pilot
Qalculate!
SpeedCrunch
Free browser calculators for sensor and instrumentation work: 4–20 mA, RTD, thermocouple, NTC, load cell and more.

WolframAlpha
SpeedCrunch
Symbolab
Qalculate!
Photomath
Mathway
Numi App
fxSolver is an free online math solver, equation library, graphing calculator and science/engineering problem helper. To get started, add some formulas, fill in any input variables and press "Solve."

Which is more popular?
Website, pricing, platforms and company facts side by side.
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| Website | sensorcatalog.com | fxsolver.com |
| Pricing | — | |
| Listed in |
In their own words, as submitted to SaaSHub.


SensorCatalog is a free set of engineering calculators and reference tables for instrumentation and electronics. It covers 4–20 mA conversion and loop power, sensor supply voltage drop, Modbus register decoding, ADC resolution, PT100/PT1000 and RTD lead-wire error, thermocouple and NTC thermistor...
Calculate multiple equations at once, Edit existing formulas and Create new ones, Compute large numbers of values, Plot graphs, Link your results, Solve full problems and Share worksheets with your friends. fxSolver is a free tool developed by a team of engineers and programmers with the sole...
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fxSolver Demo
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SpeedCrunch. SpeedCrunch is a high-precision scientific calculator featuring a fast, keyboard-driven user interface. It is free and open-source software, licensed under the GPL. Download Documentation Donate .
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158+ free, accurate calculators for finance, health, math, and everyday life — with the formula explained behind every answer.
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