Soil Porosity Calculator
A free, browser-based calculator. Runs entirely in your browser — no sign up, nothing stored.
100% FreeRuns in your browserIntermediate
Enter Values
Enter your values and press Calculate to see results.
How to use this calculator
- Enter the void (pore) volume and the total volume.
- Read the porosity and void ratio.
How it works
Porosity = void volume ÷ total volume × 100; void ratio = voids ÷ solids.
Worked example
30 of 100. Porosity 30%, void ratio 0.43.
Common mistakes
- Mixing units between void and total volume.
- Confusing porosity (of total) with void ratio (of solids).
Frequently asked questions
What's the difference between porosity and void ratio?
Porosity is voids as a fraction of total volume; void ratio is voids divided by the solids volume.
Related tools
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.