How much concrete for 4 steps?
Four steps at 1 ft run × 7 in rise × 3 ft wide need 7 cubic feet, or 0.26 cubic yards, before waste. Add 10% for about 0.29 cubic yards.
Steps calculator
Concrete Steps Calculator
Estimate concrete for porch steps, deck stairs or garden steps. Enter the run, rise, width and number of steps; the calculator multiplies the volume per step and returns yards, bags and cost.
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How to calculate concrete for steps
Volume per step = run × rise × width. Multiply by the number of steps. Convert rise from inches to feet, then divide total cubic feet by 27 for cubic yards.
Example: 4 steps, 1 ft run × 7 in rise × 3 ft wide
Each step is 1 × (7 ÷ 12) × 3 = 1.75 cubic feet. Four steps are 7 cubic feet. Divide by 27 to get 0.26 cubic yards. Add 10% waste for about 0.29 cubic yards, or roughly 14 × 80 lb bags.
Common step sets at 1 ft run × 7 in rise × 3 ft wide
| Size | Concrete | 80 lb bags* |
|---|---|---|
| 3 steps | 0.19 cu yd | 10 |
| 4 steps | 0.26 cu yd | 13 |
| 5 steps | 0.32 cu yd | 16 |
| 6 steps | 0.39 cu yd | 19 |
*Before waste. Add 5–10% for spillage and uneven subgrade.
Tips for ordering concrete for steps
- Add 5–10% waste for spillage and uneven subgrade.
- A common step is about 7 in rise and 11–12 in run; check local code for your project.
- Build the formwork strong enough for the full concrete weight and planned use.
- Use the rebar toggle for longitudinal bars following the step slope.
Concrete Steps Calculator FAQ
How do I calculate concrete for stairs?
Calculate the volume of one step as run × rise × width, then multiply by the number of steps. Convert the rise to feet and divide the total cubic feet by 27 for cubic yards.
What is a typical step run and rise?
A common exterior step is about 7 in rise with an 11–12 in run. Local codes and the total height of the stair determine the final dimensions; confirm before building the form.
How many bags of concrete for steps?
Four steps at 1 ft × 7 in × 3 ft need about 13 × 80 lb bags before waste, or roughly 14 bags with 10% waste. Bag yields vary by brand.
Do concrete steps need rebar?
Steps often use light reinforcement, especially where they attach to a slab or wall. The requirement depends on the design; follow the plan or ask your inspector.
How much does it cost to pour concrete steps?
At $120–$180 per cubic yard, 0.29 cubic yards of ready-mix costs about $35–$52 before delivery. Formwork, labor and minimum loads can dominate the total cost for small step sets.
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