Staircase Calculators
Explore our suite of free staircase calculators to precisely estimate volume, weight, and costs for your next project. Select a tool below to get started.
Calculating Concrete for Stairs
Properly estimating a set of concrete steps is one of the more complex geometric tasks in flatwork. It involves calculating the volume of a solid wedge (the base run) combined with the volume of the individual treads and risers, plus any associated landings.
Core Formula
Total Volume = (Platform Volume) + (Triangular Base Volume) + (Rectangular Steps Volume)
Frequently Asked Questions
- What is the standard rise and run for concrete stairs?
- A comfortable and code-compliant step generally has a 7-inch rise and an 11-inch run (tread depth).
- Do the stairs account for hollow forms?
- Our calculators estimate solid concrete stairs. If you fill the void beneath the stairs with rubble or compacted earth, you will need significantly less concrete.
- How wide should exterior concrete stairs be?
- Residential exterior stairs should be a minimum of 36 inches wide, though 48 inches is preferred for comfort and moving large items.
- How do I estimate the top or bottom landing?
- Treat landings as standard rectangular slabs. Multiply the landing's length, width, and depth (thickness) together and add it to the volume of the stair flights.