How to use the void ratio from dry density calculator
Find the void ratio and porosity of a soil from its specific gravity and dry density. Enter specific gravity of solids, dry density in the fields above; the void ratio, porosity are computed instantly and plotted on the chart so you can see how the answer changes.
Common searches this calculator answers include “void ratio from dry density”, “soil porosity from density”, “specific gravity soil”, “calculate void ratio from dry density”, “find void ratio”.
Formula
Variables
- gs — Specific gravity of solids
- rd — Dry density (g/cm³)
Worked example
With specific gravity of solids = 2.65, dry density = 1.6 g/cm³, the calculator gives void ratio ≈ 0.65625; porosity ≈ 39.62264 %.
Frequently asked questions
What is the void ratio from dry density calculator used for?
Find the void ratio and porosity of a soil from its specific gravity and dry density. It helps with questions such as “void ratio from dry density”, “soil porosity from density”, “specific gravity soil”.
What is the formula for the void ratio from dry density calculation?
Void ratio = gs / rd-1. Porosity (%) = [Void ratio] / (1+[Void ratio]) × 100. Here gs is specific gravity of solids, rd is dry density (g/cm³).
What inputs do I need for the void ratio from dry density calculator?
You need specific gravity of solids, dry density in g/cm³. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use the void ratio from dry density calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the void ratio from dry density result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.