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Project budget calculator

Enter labor, materials and overhead costs, plus a contingency percentage. The calculator computes the subtotal, the reserve amount, and the total project budget.

10–20% of direct costs is typical — the less predictable the project, the higher the reserve

Result

Total budget

—

Subtotal —
Contingency reserve —

Your inputs are stored in this browser, so everything is still here next time. Nothing is sent to a server.

This calculation is for informational purposes only and does not replace advice from a qualified professional. Formulas and rates may not fit your exact situation — double-check the figures before making decisions.

How it is calculated

Subtotal = labor + materials + overhead. Reserve = subtotal × contingency percentage ÷ 100. Total budget = subtotal + reserve.

A contingency reserve is standard project-budgeting practice: it covers price increases, estimation errors and minor unplanned work, so the project doesn't run out of money midway.

If a project has several stages with separate estimates, compute the subtotal per stage and add them up — a single reserve percentage can still be applied to the combined total.

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