# Void ratio

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(Redirected from E)

**Void ratio** (e) is the ratio of the volume of void space to the volume of solids. The **void ratio** is usually expressed as a decimal quantity^{[1]}.

## Equations[edit]

The following equation can be used to determine the **void ratio** of a soil or solid bulk cargo:

Where:

**e**=**void ratio**,- V
_{v}= volume of voids, - V
_{s}= volume of solids, - ρ
_{st}= specific gravity or particle density (t/m^{3}or g/cm^{3}), - ρ
_{d}= dry density (t/m^{3}or g/cm^{3}), - w = net water content by weight (%) and
- S = degree of saturation.

You can also use the calculator provided on the main site by clicking the following link:

## References[edit]

- ↑ Budhu, M. (2011). Soil mechanics and foundations, 3rd edition. New York: Wiley.

## See Also[edit]

- Bulk Density
- Degree of Saturation
- Dry Density
- Moisture Content
- Net Water Content by Weight
- Particle Density
- Specific Gravity

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