We have included three concrete volume calculators for simple straight concrete stairs to help you in estimating the amount of concrete needed for your project.

- Calculator one will calculate the volume for stairs on a slope between two grades.
- Calculator two can be used for free standing stairs that require an upper landing and sides made of concrete.
- This calculator can be used for free standing hollow concrete stairs that require one or two of the sides to be made of solid concrete in addition to an upper landing.

To calculate the amount of concrete needed with this calculator for stairs, you need to know the rise, run, throat depth, and the width of the stairs.

The throat depth of the stairs is measured from the point where the rise and run cuts meet on the inside cut, to the compacted gravel, or inside form, below. As a standard the minimum throat thickness should be at least 6 ".

This is not a very efficient way of building concrete stairs. I can see someone building stairs this way with 2 steps, but for more steps you would be better off building an inside box to limit the amount of concrete needed.

To use this calculator you need the enter the number of steps and include the landing as one of the steps. Enter the rise and run in inches, the width of the stairs and the desired length of your landing in feet and inches.

This is not a very efficient way of building concrete stairs. I can see someone building stairs this way with 2 steps, but for more steps you would be better off building an inside box to limit the amount of concrete needed.

To use this calculator you need the enter the number of steps and include the landing as one of the steps. Enter the rise and run in inches, the width of the stairs and the desired length of your landing in feet and inches.