Concrete Steps Calculator
Find how much concrete solid steps with an optional top platform need, in cubic yards and bags, with cost.
Change the values and press Calculate to work out your own figures.
Enter the steps' width, rise and run, the number of steps and the platform depth.
Show the working
- volume = Σ width × run × (rise × step number) + width × platform depth × total height
- total height = 5 × rise = 40 in
How to use it
Enter the steps' width, rise and run, the number of steps and the platform depth.
Lengths can be decimals, fractions or tape entries such as 12' 6 1/2" (in feet or inches). Prices are optional.
Key facts
volume = Σ width × run × (rise × step number) + width × platform depth × total height
Bags
Premixed bags yield about 0.30 cu ft (40 lb), 0.45 cu ft (60 lb) and 0.60 cu ft (80 lb) of concrete. Ready-mix trucks are usually cheaper above about 1 cubic yard.
Code
Most US codes limit risers to about 7¾ in and want treads of at least 10 in, the same on every step; check your local code.
Questions
How much concrete for 5 steps 48 in wide with a 24 in platform?
About 1.81 cubic yards at an 8 in rise and 10 in run.
Formulas
volume = Σ width × run × (rise × step number) + width × platform depth × total height
Sources
Limitations
- Material densities are typical values (the midpoint of the commonly published range); real loads vary with moisture, grading and compaction, so check with your supplier or type in their density.
- Tank results are the geometric volume; real tanks have wall thickness and fittings.