Soil Penetration Resistance Calculator
Estimate soil penetration resistance using cone penetrometer measurements.
Results
Penetration Resistance:
Compaction Level:
Interpretation:
Formula
Penetration Resistance (MPa) = Force (N) ÷ Cone Area (mm²)
Typical interpretation (general guideline):
<1.0 MPa → Loose soil
1.0–2.0 MPa → Moderate resistance
2.0–3.0 MPa → High resistance (may begin restricting roots)
>3.0 MPa → Severe compaction (root growth commonly restricted)
<1.0 MPa → Loose soil
1.0–2.0 MPa → Moderate resistance
2.0–3.0 MPa → High resistance (may begin restricting roots)
>3.0 MPa → Severe compaction (root growth commonly restricted)
