Construction

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Concrete Calculator.

Calculate concrete volume for slabs, footings, and columns

On-device calculationNo signup
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Set your values

Results update as you type.

Cubic Yards: 1.85

Cubic Yards

1.85
Cubic Feet: 50

Cubic Feet

50.00
Cubic Meters: 1.42

Cubic Meters

1.42
40lb Bags: 167

40lb Bags

167
60lb Bags: 112

60lb Bags

112
80lb Bags: 84

80lb Bags

84

Cite this calculator

Canonical URL: https://mathify.one/de/construction/concrete

Cite as: Mathify. (2026). Betonrechner. https://mathify.one/de/construction/concrete

Use Cases

Slab Foundation Planning

Determine the amount of concrete needed for a patio, driveway, or house foundation slab.

Example: A 20 ft x 10 ft slab with 4-inch thickness requires about 2.47 cubic yards.

Footing and Column Estimation

Calculate concrete volume for structural footings or support columns to ensure you order the right amount.

Example: A 2 ft x 2 ft footing with 1 ft depth needs 0.15 cubic yards.

Frequently Asked Questions

How does the concrete calculator work?
Enter the dimensions of your slab, footing, or column (length, width, and depth/height) and the calculator computes the volume in cubic yards or cubic meters, depending on your selected unit.
What units does the calculator support?
The calculator supports both imperial (feet, inches) and metric (meters, centimeters) units. You can switch between them to get volume in cubic yards or cubic meters.
Can I calculate concrete for multiple shapes at once?
No, this calculator is designed for one shape at a time. For multiple elements, calculate each separately and sum the volumes.

Tips & Common Mistakes

Tips

  • Always measure in the same unit system (imperial or metric) to avoid conversion errors.
  • Add 5-10% extra to your order to account for spillage, uneven subgrade, or slight over-excavation.
  • For irregular shapes, break them into smaller rectangles or circles and calculate each separately.
  • Double-check your depth/height measurements, as small errors can significantly affect volume.

Common Mistakes to Avoid

  • Mixing units (e.g., feet for length and inches for depth) without converting, leading to incorrect volume.
  • Forgetting to convert thickness from inches to feet (e.g., 4 inches = 0.333 feet) when using imperial units.
  • Not accounting for waste or over-excavation, resulting in a shortage of concrete on site.

Last updated: August 13, 2026