Earth Science

Porosity Calculator

Calculate porosity from void volume and total volume.

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Move between earthquakes, seismic waves, radiometric dating, geothermal gradients, porosity, tectonic plate motion and density relationships.

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Porosity Calculator is an educational Earth Science tool for exploring a standard quantitative relationship.

How it works

Enter the requested values using the stated units. The calculator validates the numerical domain and applies porosity (%) = void volume / total volume × 100.

The formula

porosity (%) = void volume / total volume × 100

Variables: Vᵥ = Void volume; Vₜ = Total volume.

Worked example

Example: 25 units of void volume in 100 total units → 25% porosity.

Frequently asked questions

What is this Earth Science calculator intended for?

It is intended for Earth Science study, classroom exercises and understanding the quantitative relationship represented by the model.

Does the result reproduce every real geologic situation?

No. Real Earth systems can be more complex. The result should be interpreted within the assumptions, units and simplifications of the stated model.

Last content reviewSeptember 25, 2026
Editorial reviewHe-Sab Editorial Review

Sources and references

These sources are used to verify terminology, formulas, and information related to this calculator.