dopecalc

Gravel Calculator

Determine how much gravel you need for your landscaping or construction project. Calculate cubic yards, tons, and equivalent 5-gallon bucket loads from area dimensions and depth.

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About this Calculator

Determine how much gravel you need for your landscaping or construction project. Calculate cubic yards, tons, and equivalent 5-gallon bucket loads from area dimensions and depth.

Formula & Calculations

Formula

Volume (cu ft) = Length × Width × (Depth / 12); Cubic Yards = Volume / 27; Tons = Cubic Yards × 1.4; Buckets = Volume / 0.67
Where:
  • L=Length of the area in feet
  • W=Width of the area in feet
  • D=Depth of gravel in inches
  • V=Volume in cubic feet

Assumptions

  • Gravel density is approximately 1.4 tons per cubic yard (varies by aggregate type).
  • One 5-gallon bucket holds approximately 0.67 cubic feet of material.
  • Does not account for compaction; consider adding 10-15% extra.

Calculation Examples

Example 1

Inputs:Length: 20 ft, Width: 10 ft, Depth: 3 inches
Result:50 cu ft, 1.85 cu yd, ~2.59 tons, ~75 buckets

Volume = 20 × 10 × (3/12) = 50 cu ft. Cubic yards = 50/27 ≈ 1.85. Tons = 1.85 × 1.4 ≈ 2.59. Buckets = 50/0.67 ≈ 75.

Example 2

Inputs:Length: 50 ft, Width: 30 ft, Depth: 6 inches
Result:750 cu ft, 27.78 cu yd, ~38.89 tons, ~1,119 buckets

Volume = 50 × 30 × 0.5 = 750 cu ft. Cubic yards = 750/27 ≈ 27.78.

Frequently Asked Questions

How accurate is the 1.4 tons per cubic yard estimate?

1.4 tons per cubic yard is a common average for gravel, but actual density varies from 1.2 to 1.7 tons/cy depending on the specific aggregate (pea gravel, crushed stone, etc.).

Should I order extra gravel?

Yes. It's recommended to order 10-15% more than calculated to account for compaction, uneven surfaces, and spillage during spreading.