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

Numara Calculator
SpeedCrunch
Qalculate!
Numi App
Soulver
Numby
Engineering Equation Solver
Calculate in a notebook and share — from everyday math to engineering.
Which is more popular?
Website, pricing, platforms and company facts side by side.
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| Website | sensorcatalog.com | calcumber.app |
| Pricing | ||
| Platforms | — | |
| Company | — | Startup from Switzerland · 1 - 9 employees · 2025 |
| 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...
Use variables, functions, and units and see results immediately. Add comments, copy calculations to apps like Word or Excel, or share them through an editable link. Calculate thermodynamic fluid properties with the integrated CoolProp library.
What each product offers, as listed by its team.


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How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing SensorCatalog and Calcumber.
Calcumber's answer:
Calcumber's answer:
Calcumber's answer:
When starting for a Master of Advances Study in Energy Systems, I was looking for a suitable state-of-the-art calculator. Then I built my own Calculator Calcumber and now the Eastern Switzerland University of Applied Sciences is using Calcumber for teaching students in thermodynamics.
Calcumber's answer:
Calcumber's answer:
HTML, CSS, TypeScript, PWA, CoolProp
Calcumber's answer:
Share your experience with using SensorCatalog and Calcumber. For example, how are they different and which one is better?
When comparing SensorCatalog and Calcumber, you can also consider the following products.

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A simple but powerful notepad calculator which evaluates expressions as you type.
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Online calculator for quick calculations, along with a large collection of calculators on math, finance, fitness, and more, each with related in-depth information.
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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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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."
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Qalculate! is a multiplatform multi-purpose desktop calculator.
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