Concrete Stairs Calculator – How much Concrete do you need?
The concrete stairs calculator is used to calculate the volume, weight, and number of bags of concrete stairs. Enter rise, run, width, number of steps, and platform depth to measure the concrete.
You can calculate the volume, weight, and number of bags for building porch stairs, patio stairs, garage stairs, or floating concrete stairs.
Calculator for Stairs Concrete
How to use this Concrete stairs calculator?
The following are the steps to calculate the concrete for stairs:
- In the first two steps, enter the rise and run for one step.
- The third step is to add the stair width.
- The fourth step is to include platform depth if required.
- The fifth step is to enter the number of steps.
- The last step is to click the Calculate button to see volume, weight, and bag count.
How to do stair measurement before Pouring Concrete?
Stairs measurement is done carefully using the following things:
- Rise: The height of each step
- Run: The depth of each step.
- Width: The total stair width
- Number of steps: Counting risers
- Platform depth (optional): Used for landings
Proper stair measurements lead to accurate concrete calculations.
How to Calculate Concrete Volume for Stairs?
Concrete stairs are of multiple steps with different shapes. The formula for stair volume is:
Step Volume= Rise × Run × Width
Total Volume: Step Volume × Number of Steps + Platform Volume (if any)
You do not need to remember formulas for estimating the concrete volume. Enter the required stair dimensions and calculate volume in cubic meters, cubic feet, and cubic yards.
Which units are used in the Concrete Stairs Calculator?
The concrete volume, weight, and bags are calculated as follows:
Volume: Measured in Cubic meters (m³), Cubic feet (ft³), and Cubic yards (yd³)
Weight: Measured in Kilograms and pounds
Bags: Measured in 60 lb and 80 lb bag estimates
Include 5-10% concrete in addition.

Practical Tips Before Pouring Concrete Stairs
- Check the Level and alignment of stair forms.
- Provide rise and run consistently.
- Use support for safety and stability.
- Pour concrete across the steps properly.
- Provide the stairs with proper time before walking.
Concrete Stairs Calculator FAQs
What is the formula to calculate the concrete stairs volume?
For each step, multiply rise × run × width. Then, multiply by the total number of steps and, if applicable, add platform volume.
How do I find the volume of a concrete stair?
Calculate a step’s volume by measuring its rise, run, and width, then multiply the result by the number of steps.
Do I need to reinforce my concrete stairs with rebar?
Yes. Steel reinforcement is required for the majority of concrete stairs to hold weight and prevent cracking.
What is the common width of stairs?
Wider steps are utilized for patios or public entrances, although residential stairs are typically 36 inches wide.
Can I pour concrete stairs myself?
Yes, if you use the right forms and specifications, you may pour small porch or patio stairs yourself.
How to figure stairs for rise and run?
To find the number of steps, divide the total height by the rise you want. The run is the depth of each step.
How to calculate concrete for U-shaped or circular stairs?
Every flight or curve should be measured independently. For curved staircases, use our circular slab calculator.
Related Calculator:
Circular Slab or Tube Concrete
