Dry Unit Weight Calculator
γ_d from field bulk density and moisture — the compaction-control conversion.
Compaction is judged on DRY density — water weight is a passenger. Every sand-cone or nuclear-gauge reading passes through this one-liner before the pass/fail call.
Formula
Dry Unit Weight Calculator is a free dry unit weight for geotechnical engineers and foundation designers — instant, accurate and 100% client-side, with the governing formula and reference shown next to the result so the number can be defended, not just quoted.
About Dry Unit Weight Calculator
γ_d from field bulk density and moisture — the compaction-control conversion. The calculation implements γ_d = γ_bulk/(1+w) (IS 2720-28; ASTM D1556). Compaction is judged on DRY density — water weight is a passenger. Every sand-cone or nuclear-gauge reading passes through this one-liner before the pass/fail call.
How to use Dry Unit Weight Calculator
- 1Enter Bulk (wet) unit weight in kN/m³.
- 2Enter Moisture content in %.
- 3Read Dry unit weight instantly — no submit button needed.
Why use Dry Unit Weight Calculator?
- ✓Implements the standard formula — γ_d = γ_bulk/(1+w)
- ✓Reference cited on-page: IS 2720-28; ASTM D1556
- ✓Live worked example: the substitution recomputes from your numbers
- ✓Runs entirely in your browser — nothing uploaded, free forever
Frequently asked questions
What formula does the Dry Unit Weight Calculator use?+
It computes γ_d = γ_bulk/(1+w), per IS 2720-28; ASTM D1556. The formula is displayed under the result along with a worked example substituted with your own inputs.
What should I keep in mind when using this calculator?+
Compaction is judged on DRY density — water weight is a passenger. Every sand-cone or nuclear-gauge reading passes through this one-liner before the pass/fail call.
Can this replace a soil investigation?+
No calculator replaces boreholes and lab tests — but with investigated parameters in hand, this gives you the standard-method result instantly, with the formula shown so reviewers can check it.
Is the Dry Unit Weight Calculator free to use?+
Yes — completely free, no sign-up, no limits. It runs client-side in your browser, so inputs stay private and results are instant even on slow connections.
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