Concrete Steps Calculator
Updated Formulas shown
Solid concrete steps are mostly hidden volume. Three 7 × 11 in steps, 4 ft wide, with a 3 ft landing take about 1.38 yd³ (63 bags of 80 lb) including 10% waste — most of the volume sits under the top landing.
Concrete for steps
1.38 yd³
Over ~1 yd³, ready-mix delivery is usually cheaper than bags.
- 80 lb bags
- 630.6 ft³ each
- 80 lb bags
- 63
- 60 lb bags
- 83
- Cubic feet
- 37.22 ft³
- Cubic meters
- 1.05 m³
- Weight (wet)
- 5,582 lb
Includes your waste allowance. Bag yields: 40 lb = 0.30 ft³, 60 lb = 0.45 ft³, 80 lb = 0.60 ft³.
Related calculators
- Concrete CalculatorFree concrete calculator: enter length, width and thickness to get cubic yards, 40/60/80 lb bag counts and ready-mix cost.
- Stair CalculatorStair calculator: number of steps, riser height, tread run, stringer length and angle from total rise, checked against IRC code.
- Concrete Bag CalculatorHow many bags of concrete do you need? Enter the size of your slab or pad to get the exact number of 40, 60 and 80 lb bags of Quikrete or Sakrete.
Frequently asked questions
What is a good rise and run for outdoor concrete steps?
Rise 6–7¾ in and tread 11–14 in. Keep every step the same height; code allows at most ⅜ in variation.
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Estimates only. Check quantities with your supplier or contractor before ordering.