Free online tool

Unit-aware Formula Calculator

Make a formula with named inputs and units. Change the measurements, calculate again and save the formula for later.

Works on your deviceNo account neededFormula JSONOpen workspace ↓

How do I reuse a formula with different measurements?

Write a formula using named variables, define each input as a number or quantity with units, and calculate. Change individual values to repeat the calculation. Export the formula and its current inputs together.

Your formula

Formula inputs

Define inputs

Your calculations stay in this browser.

Your result

Make the formula yours.

Change the named inputs, choose compatible output units, and calculate.

Three simple steps

How to use Unit-aware Formula Calculator

  1. Choose your input and adjust the options.

  2. Review the preview and run the tool.

  3. Download the result and keep your original.

Common questions

Good to know

Understand the result.
Keep the original.

Is this tool free, and are my files uploaded?

This tool is free with no account required. The work happens in your browser. Your input and files are not sent to a processing server.

What are the limits and details?

Calculations run on your device. Numerical results have finite precision; review assumptions and units before using them. Large or unsupported expressions are rejected.

Limits: 500,000 characters per text field; files up to 20 MB each, 10 files and 50 MB total. Processing stops after 30 seconds.