Concrete Stairs Calculator

Calculate how much concrete you need for building stairs.

Number of Steps

Rise Height per Step (inches)

Tread Depth per Step (inches)

Stair Width (inches)

Include top platform/landing

Concrete Stairs Building Guide

Building code typically requires a rise between 4-7.75 inches and a tread depth of at least 10 inches. The ideal rise/run ratio follows the rule: 2R + T = 24-25 inches. Minimum stair width is usually 36 inches. Use 4000 PSI concrete mix for stairs, and reinforce with #4 rebar. Forms should be well-braced to handle the weight of wet concrete (~150 lbs per cubic foot). Always check local building codes before construction.