Geotechnical Tools

Search and use practical engineering calculators. Outputs are preliminary and intended for education, concept screening, and assumption testing.

Soil Parameters

SPT Corrections (N60 and N1,60)

Correct field SPT blow count to N60 and overburden-corrected N1,60.

Units

Enter values and run the calculator.

Overburden correction method, C_N

Recorded SPT N

Hammer energy ratio, ER(%)

Borehole diameter factor, Cb

Rod length factor, Cr

Sampler factor, Cs

Vertical effective stress, σ'v0(kPa)

Important disclaimer

These results are simplified and indicative only. Please review the site-wide Disclaimer before using this tool in any engineering workflow.