Calculators › Compaction Report

Compaction / Distribution Report

Calculate compaction percentages and generate a distribution summary for field QA/QC.

Inputs

Estimation only. All compaction results must be verified by a licensed geotechnical engineer. Terms

Summary

average compaction (%)
Readings
Min compaction
Max compaction
Passing readings
Failing readings
Pass rate

Formula Used

Compaction % = (Field Density ÷ Proctor Maximum Dry Density) × 100
Pass/Fail = Compaction % ≥ Required %

When to Use This Calculator

Use this for processing nuclear density gauge or sand cone test readings into a formatted compaction distribution report for QA/QC documentation and submittal.

When Not to Use This Calculator

This does not replace certified lab Proctor testing or licensed geotechnical sign-off. Use only as a field summary tool — final acceptance must follow your project's QA/QC specification.

Frequently Asked Questions

What's a typical required compaction percentage?

Subgrade is commonly 95-98%, granular base 98-100%, and structural fill 95-98% of Standard Proctor — but always follow your specific project specification.

What if some readings fail?

Failing readings typically require additional compaction passes and re-testing of that specific location before acceptance. Document the failure and retest per your QA/QC procedure.