Gravel for 4,200 Square Feet
How much gravel or mulch for 4,200 sq ft, by depth.
Covering 4,200 sq ft at 3 inches deep needs about 38.89 cubic yards of gravel (~54.4 tons).
| Depth | Cubic yards | Weight (gravel) |
|---|---|---|
| 2" | 25.93 cu yd | 36.3 tons |
| 3" | 38.89 cu yd | 54.44 tons |
| 4" | 51.85 cu yd | 72.59 tons |
| 6" | 77.78 cu yd | 108.89 tons |
Cubic yards suit bulk delivery; bagged material comes in 2 cu ft bags. Weight shown for gravel (~1.4 tons/yd); mulch is much lighter.
Have exact dimensions? Use the full Gravel & Mulch Calculator to enter length, width and depth.
Last reviewed: November 2026
Data sources: Standard volume and area formulas.
Disclaimer: Quantities are estimates from the area you entered; measure your actual space and add a waste allowance. Material and labor costs vary by region.
Frequently Asked Questions
At a 3-inch depth, about 38.89 cubic yards at 3 inches deep. Deeper coverage needs more — see the table for 2 to 6 inches.
Two inches for a top-up, three to four inches for a fresh path or mulch bed. The table shows the volume at each depth.