建筑
已验证计算器，公式透明
Concrete Pier Calculator.
Estimates the volume of concrete needed for cylindrical piers and the total weight of concrete required.
您的输入
工作原理
- 1
Measure the diameter and depth of one pier in feet.
- 2
Calculate the cross-sectional area: π × (diameter/2)².
- 3
Multiply the area by the depth to get the volume per pier.
- 4
Multiply by the number of piers to get total concrete volume.
pi * (diameter / 2)^2 * depth * piers常见问题
How do I convert cubic feet to cubic yards?
Divide the cubic feet by 27. For example, 100 ft³ is about 3.7 yd³.
What is the weight of concrete per cubic foot?
Standard concrete weighs about 150 pounds per cubic foot. This calculator uses that value.
Should I order extra concrete?
It's wise to order 5-10% extra to account for spillage, uneven ground, and variations in depth.
工作原理
Estimates the volume of concrete needed for cylindrical piers and the total weight of concrete required.
- Measure the diameter and depth of one pier in feet.
- Calculate the cross-sectional area: π × (diameter/2)².
- Multiply the area by the depth to get the volume per pier.
- Multiply by the number of piers to get total concrete volume.
公式
此计算器背后的数学公式，供您核对结果。
Volume of a Cylinder
The volume of a cylindrical pier is the area of its circular base (πr²) times its height (depth).
Example:
Input: r = 0.75 ft, h = 4 ft
Calculation: π × 0.75² × 4
Result: ≈ 7.07 ft³ per pier
Total Concrete Weight
Multiply the total volume by the density of concrete (about 150 lb/ft³) to estimate weight.
Example:
Input: V = 28.27 ft³
Calculation: 28.27 × 150
Result: ≈ 4,240 lbs
实际应用场景
此计算在日常生活中的应用。
Deck Foundations
Determine concrete needed for deck piers to support posts and beams.
Example: A 12' x 16' deck with 6 piers.
Shed or Gazebo Bases
Calculate concrete for piers that support small structures.
Example: A 10' x 10' shed with 4 piers.
Post and Beam Construction
Estimate concrete for piers in post-and-beam framing.
Example: A barn with 8 piers.
提示与常见错误
Tips
- Always measure the actual depth of the hole, not just the planned depth.
- Add 10% extra concrete to your order to avoid running short.
- Use a concrete calculator for irregular shapes or multiple sizes.
- Check local building codes for minimum pier size and depth.
Common Mistakes to Avoid
- Using diameter instead of radius in the area formula.
- Forgetting to multiply by the number of piers.
- Not accounting for concrete waste or spillage.
假设与限制
- Use the stated inputs and units.
- Results are estimates for planning and education.
- Check measurements and source data before making an important decision.