Concrete steps calculator

Calculate a solid stack of rectangular concrete steps: volume = width × rise × tread × n(n + 1)/2.

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Number of equal steps

Rise per step

More inputs and assumptions

Tread depth

Stair width

Answer

…

Calculate a solid stack of rectangular concrete steps: volume = width × rise × tread × n(n + 1)/2.

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Precision and calculation record

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Rounding changes displayed numbers, not the calculation. Text, fractions, matrices and CSV schedules keep their own formatting. Automatic keeps up to 12 significant digits, with money shown to cents where applicable.

Step-by-step calculation

Inputs are substituted below. Each line evaluates the next operation; intermediate values are displayed to 12 significant digits while the calculation uses full precision.

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Formula and assumptions

Each step adds one tread depth and one rise. Assumes solid fill to a flat base, with no landing, hollow core, reinforcement displacement or allowance. Dimensions share one unit.

Automatic precision shows numbers to 12 significant digits. Thousands separators such as 1,000 are accepted; use a dot for decimals.

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Updated 2026-09-26

Using Concrete steps calculator

Calculate a solid stack of rectangular concrete steps: volume = width × rise × tread × n(n + 1)/2.

Each step adds one tread depth and one rise. Assumes solid fill to a flat base, with no landing, hollow core, reinforcement displacement or allowance. Dimensions share one unit.

Next: Concrete calculator

A worked example

Example inputs: number of equal steps = 3, rise per step = 0.2, tread depth = 0.3, stair width = 1. Solid concrete volume = 0.36.

Before you use the result

Each step adds one tread depth and one rise. Assumes solid fill to a flat base, with no landing, hollow core, reinforcement displacement or allowance. Dimensions share one unit.

Example results for number of equal steps

These examples use Rise per step: 0.2; Tread depth: 0.3; Stair width: 1. They are reference calculations, not recommended settings.

Number of equal steps	Solid concrete volume
3	0.36
6	1.26

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