Foundations & Piles

Lateral Pile P-y Curve Generator

Generate non-linear p-y response curves for laterally loaded piles in soft clays (Matlock 1970) and sands (API RP 2A) at varying depths.

API RP 2AMatlock 1970

Inputs

Demo

1. Formulation & Pile Dimensions

P-y Standard Formulation

Pile Diameter B (m)

Target Depths for P-y Evaluation (m, comma or space separated)

2. Soil Strength & Subgrade Modulus

Effective Unit Wt. γ' (kN/m³)

Undrained Shear Strength cu (kPa)

Strain at 50% Stress ε50

Results

Enter pile diameter and evaluation depths above, or click a Demo Preset at the top to generate P-y curves.

Theory and formulae

P-y Governing Formulation Criteria

About this calculator

This free lateral pile p-y curves calculator runs entirely in your browser: what you enter is never uploaded. Switch between metric and imperial units at any time. Use the calculation steps and the theory section to check the working, and print a calculation sheet with the inputs, results and formulae for your records.

Methods and references: API RP 2A, Matlock 1970.

Topics: p-y curves, lateral pile, matlock, api sand, subgrade reaction, soil resistance.

Engineering notice: Results are for preliminary estimation, screening and education. All inputs and outputs must be independently verified by a qualified professional engineer before use in any design or construction decision. Read the full disclaimer