Concrete Stairs Calculator

Calculate concrete volume for stairs from dimensions including rise, run, and width.

Number of Steps

Stair Width (ft)

Rise Height (in per step)

Tread Depth (in per step)

Slab Thickness Under Stairs (in)

Waste Factor (%)

Include Landing?

Total Concrete Volume

0 yd3

0 cubic feet

Total Rise

0 ft

Total Run

0 ft

Stair Angle

0 deg

Weight

0 lbs

Code Check (IRC 2018)

Concrete Stair Design Guide

Step volume: Width x Tread x Rise (per step, cumulative from bottom)

Base slab: Width x Stair length x Slab thickness

Code rule: 2R + T should be 24-25 inches (comfort rule)

Concrete volume.

Slab volume.

Formwork estimator.

Rebar requirements.

Mix design.

Rebar sizing.