Concrete Stairs Calculator
Cubic yards and bags for solid poured steps — width, number of steps, run and rise.
Concrete stairs calculator
Shape
Waste factor
Concrete needed (waste in)
5.43 yd³
146.7 ft³ · 4.15 m³
Bags (rounded up)
245
80 lb
326
60 lb
392
50 lb
489
40 lb
- Ready-mix (delivered)
- $739 – $1,207
- Bagged (80 lb)
- $1,348 – $2,205
- Installed (slab)
- $2,200 – $4,800
Concrete 5.43 yd³
Sizing concrete steps
Solid steps on grade are filled underneath, so the concrete is the staircase side profile multiplied by the step width. Enter the run (tread depth) and rise (step height) in inches and the number of steps — the calculator handles the geometry and rounds bags up.
Prices updated January 2026 National US averages · reviewed quarterly
Volumes use standard bag yields and a 10% waste allowance; costs are national US averages that vary by region, mix and finish. See our methodology for exactly how each figure is worked out, or check the reference sources:
Concrete calculators
Concrete Calculator Any shape: yards, bags & cost Concrete Slab Calculator Slabs & floors Concrete Footing Calculator Strip & continuous footings Concrete Wall Calculator Foundation & retaining walls Concrete Column & Tube Calculator Columns, piers, sonotubes Concrete Stairs Calculator Solid poured steps Concrete Yardage Calculator By the cubic yard Bags of Concrete Calculator 40 / 50 / 60 / 80 lb bags Concrete Slab Cost Price per square foot
Frequently asked questions
How much concrete for stairs?
Solid poured steps use the filled step profile times the width. A 4 ft wide flight of 4 steps at 11" run and 7" rise needs about 0.8 cubic yards. Enter your stairs above.
What are typical stair dimensions?
A common comfortable stair has a 10–11" run (tread depth) and a 7" rise (step height). Local codes set the limits.