Gravel & Stone Estimator
Crushed Stone / Standard Gravel (1.4 tons/yd³)
Pea Gravel (1.2 tons/yd³)
River Rock (1.3 tons/yd³)
Dense Grade Aggregate (1.5 tons/yd³)
Lava Rock (1.1 tons/yd³)
Calculation Results
Total Cubic Feet:
0
Total Cubic Yards:
0
Estimated Tons Needed:
0
*Recommended: Add 5-10% extra for compaction and coverage gaps.
How to Calculate Gravel for Your Project
Whether you are building a new driveway, laying a garden path, or creating a drainage area, accurately estimating the amount of gravel required is essential to stay on budget and avoid multiple delivery fees. Our gravel calculator helps you determine the volume in cubic yards and the weight in tons.
The Calculation Formula
To calculate gravel manually, follow these steps:
- Measure Area: Multiply the length (ft) by the width (ft) to get the square footage.
- Convert Depth: Divide your desired depth in inches by 12 to convert it to feet.
- Calculate Volume: Multiply Square Footage × Depth (ft) to get Cubic Feet.
- Convert to Yards: Divide Cubic Feet by 27 (since there are 27 cubic feet in one cubic yard).
- Calculate Weight: Multiply Cubic Yards by the density of the material (typically 1.4 for standard gravel).
Standard Material Densities
Different stones have different weights. Use these estimates for your planning:
- Crushed Stone: Approximately 2,800 lbs per cubic yard (1.4 tons).
- Pea Gravel: Approximately 2,400 lbs per cubic yard (1.2 tons).
- River Rock: Approximately 2,600 lbs per cubic yard (1.3 tons).
- Lava Rock: Much lighter, approximately 2,200 lbs per cubic yard (1.1 tons).
Real-World Example
If you have a driveway that is 50 feet long and 12 feet wide, and you want a depth of 4 inches:
- Area: 50 × 12 = 600 sq. ft.
- Depth: 4 / 12 = 0.333 ft.
- Volume: 600 × 0.333 = 200 cubic feet.
- Cubic Yards: 200 / 27 = 7.41 cubic yards.
- Weight (Crushed Stone): 7.41 × 1.4 = 10.37 Tons.