Gravel & Mulch Calculator
Calculate volume, weight and cost of gravel, mulch, sand or topsoil.
Frequently Asked Questions
How many cubic yards of gravel do I need?
Volume (cubic yards) = Area (sq ft) × Depth (inches) ÷ 324. For a 200 sq ft driveway at 4 inch depth: 200 × 4 ÷ 324 = 2.47 cubic yards. In metric: Area (m²) × Depth (m) = cubic metres. Always order 10% extra for settling and waste.
How heavy is a cubic yard of gravel?
A cubic yard of gravel weighs 2,800–3,400 lbs (1.27–1.54 tonnes) depending on type. Pea gravel: ~2,800 lbs/yd³. Crushed stone: ~3,000–3,400 lbs/yd³. Decomposed granite: ~2,800 lbs/yd³. Landscape mulch: ~600–800 lbs/yd³ (much lighter). Check weight limits before ordering bulk delivery.
What depth of mulch should I apply?
For weed suppression and moisture retention: 2–4 inches of organic mulch. Less than 2 inches is less effective at suppressing weeds. More than 4 inches can prevent rain penetration and cause root problems. Keep mulch away from plant stems and tree trunks — leave a 2-inch gap to prevent rot.