Geotechnical Toolbox has a new address: "geotechsuite.com". The old address will work until Dec 31, 2026. If you have bookmarked the old address, please update it.Open New Address
Geotechnical Toolbox

Soil Mechanics & Lab Tests

Proctor Compaction Curve Analyzer

Fit laboratory moisture-density compaction test points with quadratic regression to determine Optimum Moisture Content (OMC), Maximum Dry Density (MDD), and Zero Air Voids (ZAV) curves.

ASTM D698ASTM D1557AASHTO T99

Inputs

Demo

Experimental Compaction Points & Soil Properties

No test points entered. Click "Add Point" above or select a Standard/Modified Proctor Preset at the top to load experimental data.

Results

Enter at least 3 experimental moisture-density test points above, or click a Standard / Modified Proctor Preset at the top to compute compaction parameters.

Theory and formulae

Proctor Equations & Zero Air Voids Theory

About this calculator

This free proctor analyzer calculator runs entirely in your browser: what you enter is never uploaded. Use the calculation steps and the theory section to check the working, and print a calculation sheet with the inputs, results and formulae for your records.

Methods and references: ASTM D698, ASTM D1557, AASHTO T99.

Topics: proctor test, compaction curve, omc, mdd, zero air voids, zav, dry density.

Engineering notice: Results are for preliminary estimation, screening and education. All inputs and outputs must be independently verified by a qualified professional engineer before use in any design or construction decision. Read the full disclaimer