CalcCalculadora de Degraus de Concreto
Última atualização: 2026-05-07
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| Elevação total (m) | Comprimento total (m) | Largura do degrau (m) | Altura do espelho (cm) | |
|---|---|---|---|---|
| Caso 1 | 0.4 m | 1.0 m | 0.5 m | 10.0 cm |
| Caso 2 | 0.7 m | 1.75 m | 0.84 m | 12.6 cm |
| Caso 3 | 1.0 m | 2.5 m | 1.2 m | 18.0 cm |
| Caso 4 | 1.5 m | 3.75 m | 1.8 m | 25.0 cm |
| Caso 5 | 2.5 m | 6.25 m | 3.0 m | 25.0 cm |
What is the Concrete Steps Calculator?
Building concrete steps is a precision task — the ratio of riser height to tread depth determines safety and comfort. The classic rule is that 2 × riser + tread = 630 mm (the comfortable stride). This calculator works out how many steps fit your total rise and run, checks the riser-to-tread ratio, and calculates the concrete volume needed to pour them.
You may also find the Retaining Wall Calculator, Paver Calculator, and Mass Concrete Calculator useful.
Who Uses This Calculator?
This tool is used by homeowners building entrance steps, landscapers constructing garden stairs, and contractors forming concrete stairways.
How to Use the Concrete Steps Calculator
- Enter your Total rise.
- Enter your Total run.
- Enter your Step width.
- Enter your Riser height.
- Click Calculate to see your results instantly.
Formula
The calculator uses the following formula:
Steps = round(total_rise ÷ riser_height); Tread = total_run ÷ steps; Concrete = steps × width × riser × tread / 2
Worked Example
A 1.05 m total rise with 0.175 m risers, 1.2 m step width, and 0.28 m treads needs 6 steps and approximately 0.35 m³ of concrete.
Step-by-Step Calculation
- Number of steps: round(90 cm ÷ 18 cm) = 5 steps
- Tread depth: 180 cm ÷ 5 = 36 cm per tread
- Stringer length: sqrt(90² + 180²) = 201 cm ≈ 2.01 m
- Concrete volume (staircase prism): 5 × 1.2 × 0.18 × 0.36 ÷ 2 = 0.19 m³
Common Mistakes to Avoid
- Using riser height outside the 15–20 cm comfort zone for walking
- Forgetting that the last step lands on existing grade — adjust total rise accordingly
- Not adding landing slabs at the top and bottom
Frequently Asked Questions
The standard formula is: 2 × riser + tread = 630 mm. For a 175 mm riser: tread = 630 - 350 = 280 mm. For outdoor steps, treads are often wider (300–350 mm) for comfort.
Divide the total rise by the desired riser height and round to the nearest whole number. Then recalculate the actual riser = total rise ÷ number of steps. All risers must be equal — unequal risers are a trip hazard.
The volume is approximately: number_of_steps × width × riser × tread / 2. This treats each step as a wedge. Add 10% for waste and formwork overfill. The calculator does this automatically.
Yes — steps wider than 1 m or with more than 3 risers should be reinforced with rebar or mesh. This prevents cracking from ground movement. Use 10 mm rebar on a 200 mm grid.
Concrete reaches walking strength in 24–48 hours, but continues to cure for 28 days. Avoid heavy loads (vehicles, furniture) for at least 7 days. Keep new concrete moist for the first 3–7 days to improve strength.