Calculate how much area your landscape rock will cover—or determine how many tons you need. Get accurate coverage estimates that prevent costly over-ordering.
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| Rock Type | 2" Depth | 3" Depth | 4" Depth |
|---|---|---|---|
| Pea Gravel (3/8") | 80 sq ft | 55 sq ft | 40 sq ft |
| Crushed Stone (3/4") | 90 sq ft | 60 sq ft | 45 sq ft |
| River Rock (1-2") | 100 sq ft | 65 sq ft | 50 sq ft |
| River Rock (2-4") | 110 sq ft | 75 sq ft | 55 sq ft |
| Lava Rock | 180 sq ft | 120 sq ft | 90 sq ft |
Why expert review matters
Every calculator is reviewed by certified professionals to ensure accuracy.Hawkin's CCP, CEP certification ensures professional-grade precision.
How much rock per square foot?
12-15 lbs at 2" depth, 18-22 lbs at 3" depth
How many sq ft does a ton cover?
80-120 sq ft at 2" depth depending on rock size
Best depth for weed prevention?
3-4 inches over landscape fabric
Bulk vs bags—which is cheaper?
Bulk is $25-75/ton; bags equal $300-600/ton
This calculator uses the formula: Coverage = (Tons × 2000) ÷ (Depth × Density), where density varies by rock type from 50-105 lbs per cubic foot. For tonnage calculations, we reverse the formula and apply your selected waste factor. All estimates account for natural void space between stones.
Formula
Tons = (Area × Depth ÷ 12 × Density) ÷ 2000
Area Covered = (Tons × 2000) ÷ (Density × Depth ÷ 12)