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Foundation Design Calculator

Pad, sloped, stepped, combined and pile footings — designed in your browser to IS 456, ACI 318 and Eurocode 2.

A free online foundation design calculator built for practising structural engineers. Enter column loads and soil bearing capacity; IntelliCascade™ progressively tries five footing types and returns a code-compliant design with reinforcement schedule, FEM verification and a downloadable report.

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Design codes
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Use cases
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FAQs answered

Design codes supported

IS 456:2000
Indian standard for plain & reinforced concrete
ACI 318-19
American building code for structural concrete
Eurocode 2 (EN 1992-1-1)
European concrete design code
Why engineers pick it

What makes this different

5 footing types in one tool

Pad, sloped, stepped, combined and pile cap — switch with a click instead of running five spreadsheets.

IntelliCascade™ optimisation

Patent-pending engine that tries simpler footing types first and only escalates if checks fail. Saves concrete and rebar without compromising safety.

FEM verification built-in

Mindlin plate elements verify base pressure and bending — no separate software needed.

Reports and BBS in one click

Generate a stamped PDF report and Bar Bending Schedule that match your project numbering convention.

Workflow

How it works

  1. 1

    Enter loads & soil parameters

    Axial load, moments, soil safe bearing capacity and material grades. Imperial or metric — toggle anytime.

  2. 2

    IntelliCascade™ runs the cascade

    The engine attempts pad first, escalates to sloped/stepped/combined/pile only when checks fail. Returns the most economical compliant design.

  3. 3

    Review checks & 3D view

    Inspect bearing pressure, settlement, one-way and two-way shear, flexure and crack-width checks with a side-by-side 3D footing view.

  4. 4

    Export PDF report & BBS

    Download a code-referenced PDF report and a bar bending schedule ready for your contractor.

Real-world use

Common scenarios

G+4 residential building footings

Quickly size pad footings for the typical 200–600 kN column loads in low-rise residential work.

Industrial column with eccentric load

Combined footings that share two adjacent columns when boundary lines force a constraint.

Pile cap design on weak soil

When SBC < 100 kN/m², escalate straight to a pile group with the appropriate cap.

Retrofit and extension projects

Stepped or sloped footings under existing structures where headroom is tight.

Worked examples

Try it on a real scenario

Three engineering cases with the inputs and expected results. Open one to see exactly what to type into the calculator.

Questions

Frequently asked questions

Yes. The core calculator — including all five footing types and code-compliant checks — is free with no credit card required. Optional upgrades cover advanced exports, FEM reports and team collaboration.
IS 456:2000, ACI 318-19 and Eurocode 2 (EN 1992-1-1). Code-specific load factors, partial safety factors and detailing rules apply automatically based on the code you select.
IntelliCascade™ is our patent-pending optimisation engine that tries the simplest footing type first and progressively escalates (sloped → stepped → combined → pile) only when code checks fail, finding the most economical compliant design without manual iteration.
All design computation runs client-side via WebAssembly. Your project data stays on your device unless you explicitly save it to your CivilTech Studio account.
Yes. Both a code-referenced PDF report and a Bar Bending Schedule (BBS) are generated from the same model, so quantities and reinforcement always match.
Yes — pile group capacity, group-effect reductions and pile cap design are part of the same workflow. Choose pile in the cascade or let IntelliCascade™ escalate to it automatically.

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