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Staircase Calculator — Free Online Calculator

Calculates stair dimensions: rise, run, and number of steps.

What is it?

The staircase calculator works out the number of steps, the flight length, the concrete volume, and the formwork area for a monolithic reinforced-concrete staircase.

Formula

Steps = ⌈storey height / riser height⌉ Flight length = steps × tread depth Concrete = volume of the inclined slab + volume of the steps

Example

Storey height 3 m, step 17 × 28 cm, width 1 m. Steps: ⌈3 / 0.17⌉ = 18. Flight: 18 × 0.28 = 5.04 m. Concrete: 1.13 m³.

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