Concrete Steps Calculator — Concrete for Stairs

Estimate the concrete for a set of poured steps. Enter the number of steps, the width and the rise and run of each step — the calculator works out the stepped volume and returns cubic yards and the number of 80 lb bags.

How it works

A solid set of steps stacks a taller block under each higher tread. Side-profile area = run × rise × n(n+1)/2 (in²) ÷ 144, where n is the number of steps. Volume = width × that area, plus your waste allowance. 80 lb bags = cu ft ÷ 0.60.

Frequently asked questions

How much concrete do concrete steps need?

It depends on the number of steps and their size — a solid staircase grows with the square of the step count. A 3-step, 4 ft wide stoop at 7 in rise / 11 in run is roughly 0.35 cu yd. Enter your dimensions for an exact figure.

What is a standard step rise and run?

A comfortable exterior step is about a 6–7.5 in rise with a 11–12 in run. Keep every step in a flight the same size for safety and code.

Do I pour the steps solid?

This calculator assumes a solid pour. If you fill the core with compacted gravel or rubble and only pour a shell, you will use less concrete than the solid estimate.

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Estimates are for planning only. Material yields, densities and code requirements vary — confirm quantities with your supplier and local building code before ordering.