Single-Pile Capacity Calculator

Calculate shaft resistance, end bearing, negative skin friction, and allowable capacity for driven and bored piles in layered soil.

Layered soil profilePunch-through guardNegative skin friction

Results depend on soil-investigation quality and construction assumptions. An engineer must verify code and site applicability before design use.

Pile configuration

Select the actual installation method and section. Special sections require manufacturer-source evidence.

Section shape

Section width (m)

Embedded length from ground surface (m)

Order layers downward from ground level and cover the full pile depth. The calculator will not extrapolate missing soil data.

Soil layer 1

Soil type

Layer thickness (m)

Undrained shear strength su (kPa)

Total unit weight γ (kN/m³)

Soil layer 2

Soil type

Layer thickness (m)

Undrained shear strength su (kPa)

Total unit weight γ (kN/m³)

Concrete strength and target working load are optional. Without fc', the structural capacity check is not evaluated.

Water-table depth from ground surface (m)

Factor of safety

Concrete strength fc' (MPa) — optional

Leave blank to skip the section compression-capacity check.

Target working load per pile (kN) — optional

Finds the first depth where governing allowable capacity reaches the target.

Include negative skin frictionShaft resistance above the selected depth is excluded from positive resistance and subtracted after applying FS.

Enter the pile and soil-profile data, then calculate to view results.