Calculators

Proctor Compaction Curve Tool

Updated September 5, 2026

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Content in this library is provided for general information only. It does not constitute engineering, environmental, health-and-safety, or legal advice, and Reborn Rental makes no warranty or guarantee regarding accuracy, completeness, or fitness for a particular site or scope of work.

Laws, permits, and best practices differ by location and change over time—always confirm requirements with the authorities having jurisdiction, your engineer or environmental professional, and your own policies. Independently verify every calculation, assumption, and measurement before ordering materials, designing controls, or performing work in the field.

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📊 Proctor Compaction Curve standard & modified proctor

Find optimum moisture content (OMC) and maximum dry density (γd,max) from compaction test data. Used for earthfill, embankments, and foundation QA/QC.

🏞️ Soil type preset

Loads typical compaction data

⚙️ Compaction energy

📌 Test points (moisture % , dry density pcf)

Enter at least 3–5 points for accurate curve

📐 Dry density (pcf) = wet density / (1 + moisture%/100). Curve fitted with 2nd‑order polynomial; OMC = vertex of parabola, max dry density = value at OMC. Always verify with field density tests (sand cone, nuclear gauge).

Compiled by the Reborn Rental team, backed by our field engineers and dispatch staff working Denver-metro concrete washout and equipment rental jobs.

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Proctor Compaction Curve Tool

📊 Proctor Compaction Curve standard & modified proctor