Construction
Concrete Steps Calculator
Approximate solid concrete volume for a straight staircase.
Free to use — no sign-up or login.
0.58 ft is about 7 inches.
Volume
ft³
Volume
yd³
Amortization schedule
| # | Date | Payment | Principal | Extra | Interest | Balance |
|---|---|---|---|---|---|---|
Each step is treated as a right triangular prism: half of tread times rise, times width, times the number of steps. Five steps at a 1 ft tread, 0.58 ft rise, and 4 ft width are 5.80 ft³.
A flat pad is on the round slab calculator. This page does not add nosings or a landing.
The triangular-prism model
The solid under a straight stair is approximated as count × (tread × rise / 2) × width. That ignores the extra concrete in a nosing.
Rise of 0.58 ft
0.58 ft is about 7 inches. The short decimal is that inch equivalent, not a third repeating fraction.
Worked example: five steps
Steps 5, tread 1 ft, rise 0.58 ft, width 4 ft. Volume 5.80 ft³ and 0.21 yd³.
\[ V = 5 \times (1 \times 0.58 / 2) \times 4 \]
Frequently asked questions
What does the concrete steps calculator measure?
Five steps at those defaults are 5.80 ft³. Landings are not included.
How many decimal places does concrete steps calculator show?
Five steps at those defaults are 5.80 ft³. Landings are not included. Lengths, areas, volumes, and money use two decimals. Purchase counts are whole numbers.
Does concrete steps calculator include waste?
No waste factor and no nosing volume.
Can concrete steps calculator mix units?
No. concrete steps calculator expects every input in the unit printed on its label.
Is concrete steps calculator a code or structural check?
No. concrete steps calculator is a quantity estimate. Local rules and site conditions stay outside the formula.
References
Assumptions and limitations
No waste factor and no rebar. Nosings and landings are ignored by the triangular-prism model.