Zero Air Void Line Calculator
Theoretical max dry density at a moisture content — the line no test may cross.
A field result plotting ABOVE this line is physically impossible — the fastest way to catch a fudged density report. Good compaction curves peak ~5% air voids below it.
Formula
Zero Air Void Line Calculator is a free zero air void 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 Zero Air Void Line Calculator
Theoretical max dry density at a moisture content — the line no test may cross. The calculation implements γ_zav = G_s·γ_w/(1 + w·G_s) (Proctor plot construction — IS 2720). A field result plotting ABOVE this line is physically impossible — the fastest way to catch a fudged density report. Good compaction curves peak ~5% air voids below it.
How to use Zero Air Void Line Calculator
- 1Enter Specific gravity G_s.
- 2Enter Moisture content in %.
- 3Read ZAV dry unit weight instantly — no submit button needed.
Why use Zero Air Void Line Calculator?
- ✓Implements the standard formula — γ_zav = G_s·γ_w/(1 + w·G_s)
- ✓Reference cited on-page: Proctor plot construction — IS 2720
- ✓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 Zero Air Void Line Calculator use?+
It computes γ_zav = G_s·γ_w/(1 + w·G_s), per Proctor plot construction — IS 2720. 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?+
A field result plotting ABOVE this line is physically impossible — the fastest way to catch a fudged density report. Good compaction curves peak ~5% air voids below it.
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 Zero Air Void Line 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.
Related Engineering tools
Reynolds Number Calculator
Compute Re from density, velocity, pipe diameter and viscosity — with instant laminar/turbulent classification.
● LiveLaminar vs Turbulent Flow Classifier
Classify hydraulic-oil or process-fluid flow regime from kinematic viscosity, line velocity and tube bore.
● LiveBernoulli Equation Solver
Solve downstream pressure between two points from velocities, elevations and fluid density (ideal, lossless).
● Live