Строительство
Проверенный калькулятор с прозрачной формулой
Concrete Stair Tread Calculator.
Estimates the volume of concrete needed for stair treads and the total surface area, based on tread dimensions and number of steps.
Ваши данные
Как это работает
- 1
Enter the tread depth, width, and thickness in inches.
- 2
Enter the number of steps.
- 3
The calculator multiplies the three dimensions by the number of steps to get total volume in cubic inches.
- 4
It converts to cubic feet by dividing by 1728 and also shows the total surface area in square feet.
(tread_depth * tread_width * tread_thickness * num_steps) / 1728Часто задаваемые вопросы
Why divide by 1728?
There are 1728 cubic inches in one cubic foot (12 × 12 × 12), so dividing the total cubic inches by 1728 gives the volume in cubic feet.
Should I add extra concrete for waste?
Yes, it's common to add 5-10% extra to account for spillage, uneven surfaces, or slight over-excavation.
Does this include the riser?
No, this calculator only estimates the concrete for the treads themselves. If you need risers, calculate them separately.
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Результаты
Формула проверенаОценка только для общего руководства — проверяйте важные решения с соответствующим специалистом.
Как это работает
Estimates the volume of concrete needed for stair treads and the total surface area, based on tread dimensions and number of steps.
- Enter the tread depth, width, and thickness in inches.
- Enter the number of steps.
- The calculator multiplies the three dimensions by the number of steps to get total volume in cubic inches.
- It converts to cubic feet by dividing by 1728 and also shows the total surface area in square feet.
Формулы
Математика, лежащая в основе этого калькулятора, изложена так, чтобы вы могли проверить результат.
Volume of a single tread
The volume of one rectangular tread is the product of its three dimensions.
Example:
Input: depth = 11 in, width = 36 in, thickness = 4 in
Calculation: 11 × 36 × 4 = 1584 in³
Result: ≈ 0.92 ft³ per tread
Total concrete volume
Multiply the volume of one tread by the total number of steps to get the overall concrete requirement.
Example:
Input: V = 0.92 ft³, steps = 10
Calculation: 0.92 × 10 = 9.2 ft³
Result: ≈ 9.2 ft³
Примеры из реальной жизни
Где этот расчет встречается в повседневной жизни.
Estimating concrete order
Quickly determine how much concrete to order for a set of stairs, avoiding over- or under-ordering.
Example: For 10 steps with 11×36×4 inch treads, order about 9.2 ft³ plus waste.
Cost estimation
Multiply the concrete volume by the local price per cubic yard to estimate material cost.
Example: If concrete costs $120 per cubic yard, 9.2 ft³ (0.34 yd³) costs about $41.
Planning formwork
Knowing the surface area helps estimate the amount of formwork material needed.
Example: Total surface area for 10 steps is 27.5 ft².
Советы и частые ошибки
Tips
- Measure tread dimensions accurately; small errors multiply over many steps.
- Add 5-10% extra concrete for waste and spillage.
- Use consistent units (inches for dimensions, feet for volume).
- For curved or irregular stairs, this calculator gives a rough estimate only.
Common Mistakes to Avoid
- Forgetting to convert inches to feet before calculating volume.
- Not including the number of steps in the total volume calculation.
- Ignoring waste factor, leading to a shortage of concrete.
Допущения и ограничения
- Use the stated inputs and units.
- Results are estimates for planning and education.
- Check measurements and source data before making an important decision.