Mulch Calculator Square Feet
Enter square footage and depth to get cubic yards, bag count, and cost instantly. Works as a mulch square footage calculator and sq ft to cubic yards converter in one tool.
Mulch Square Footage Calculator
Enter square footage or bed dimensions - get cubic yards and bags instantly
Enter total bed area in square feet
Square Feet to Cubic Yards Calculator
The square feet to cubic yards calculator uses a formula that divides the product of area and depth by 324. The number 324 equals 12 multiplied by 27 - converting depth from inches to feet and volume from cubic feet to cubic yards in a single step.
Square Feet to Cubic Yards - Step by Step
How Much Mulch per Square Foot (by depth)
Mulch per square foot depends entirely on depth. At 3 inches deep - the NALP standard - each square foot of bed requires 0.25 cubic feet or 0.00926 cubic yards of mulch. Doubling the depth doubles the mulch needed per square foot.
Mulch Needed per Square Foot - All Depths
| Depth | Cu Ft per Sq Ft | Cu Yd per Sq Ft | 2 cu ft Bags per Sq Ft | Sq Ft per 2 cu ft Bag | Sq Ft per Cu Yd |
|---|---|---|---|---|---|
| 1 inch | 0.083 | 0.0031 | 0.042 | 24 sq ft | 324 sq ft |
| 2 inches | 0.167 | 0.0062 | 0.083 | 12 sq ft | 162 sq ft |
| 3 inches (NALP) | 0.250 | 0.0093 | 0.125 | 8 sq ft | 108 sq ft |
| 4 inches | 0.333 | 0.0123 | 0.167 | 6 sq ft | 81 sq ft |
| 5 inches | 0.417 | 0.0154 | 0.208 | 4.8 sq ft | 65 sq ft |
| 6 inches | 0.500 | 0.0185 | 0.250 | 4 sq ft | 54 sq ft |
All values before 10% waste factor. Mulch coverage per yard = 324 / Depth (in). The NALP standard depth is 3 inches for all residential landscape beds.
Coverage Examples (100 / 200 / 500 / 1000 sq ft)
These coverage examples show cubic yards, cubic feet, and bag counts for the four most common residential bed sizes. All values use the formula: Square Feet x Depth / 324 = Cubic Yards. Add 10% before ordering.
How Much Mulch for 100 Square Feet
| Depth | Cubic Yards | Cubic Feet | 2 cu ft Bags | 3 cu ft Bags | +10% Order |
|---|---|---|---|---|---|
| 2 inches | 0.62 yd³ | 16.7 cu ft | 9 bags | 6 bags | 0.68 yd³ |
| 3 inches | 0.93 yd³ | 25 cu ft | 13 bags | 9 bags | 1.02 yd³ |
| 4 inches | 1.23 yd³ | 33.3 cu ft | 17 bags | 12 bags | 1.36 yd³ |
How Much Mulch for 200 Square Feet
| Depth | Cubic Yards | Cubic Feet | 2 cu ft Bags | 3 cu ft Bags | +10% Order |
|---|---|---|---|---|---|
| 2 inches | 1.23 yd³ | 33.3 cu ft | 17 bags | 12 bags | 1.36 yd³ |
| 3 inches | 1.85 yd³ | 50 cu ft | 25 bags | 17 bags | 2.04 yd³ |
| 4 inches | 2.47 yd³ | 66.7 cu ft | 34 bags | 23 bags | 2.72 yd³ |
How Much Mulch for 500 Square Feet
| Depth | Cubic Yards | Cubic Feet | 2 cu ft Bags | 3 cu ft Bags | +10% Order |
|---|---|---|---|---|---|
| 2 inches | 3.09 yd³ | 83.3 cu ft | 42 bags | 28 bags | 3.40 yd³ |
| 3 inches | 4.63 yd³ | 125 cu ft | 63 bags | 42 bags | 5.09 yd³ |
| 4 inches | 6.17 yd³ | 166.7 cu ft | 84 bags | 56 bags | 6.79 yd³ |
How Much Mulch for 1,000 Square Feet
| Depth | Cubic Yards | Cubic Feet | 2 cu ft Bags | 3 cu ft Bags | +10% Order |
|---|---|---|---|---|---|
| 2 inches | 6.17 yd³ | 166.7 cu ft | 84 bags | 56 bags | 6.79 yd³ |
| 3 inches | 9.26 yd³ | 250 cu ft | 125 bags | 84 bags | 10.19 yd³ |
| 4 inches | 12.35 yd³ | 333 cu ft | 167 bags | 112 bags | 13.59 yd³ |
At 1,000 sq ft and 3 inches, bulk delivery is more cost-effective than bags. A standard dump truck carries 7-10 cubic yards per load. The Professional Grounds Management Society (PGMS) uses cubic yards as the standard unit for all commercial mulch orders.
Mulch Coverage per Yard - Quick Reference
FAQ
At 3 inches deep, each square foot of bed needs 0.25 cubic feet or 0.0093 cubic yards of mulch. One 2 cu ft bag covers 8 square feet at 3 inches. One cubic yard covers 108 square feet at 3 inches. This is the NALP standard depth for residential landscape beds.
At 2 inches deep, each square foot needs 0.167 cubic feet or 0.0062 cubic yards. One 2 cu ft bag covers 12 square feet at 2 inches. One cubic yard covers 162 square feet at 2 inches. Use 2 inches for flower beds and annual gardens.
Multiply square feet by depth in inches, then divide by 324. For 300 sq ft at 3 inches: 300 x 3 / 324 = 2.78 cubic yards. Add 10% for waste: order 3.06 cubic yards. The number 324 equals 12 x 27, combining both conversion steps into one.
100 sq ft at 3 inches needs 0.93 cubic yards or 13 bags of 2 cu ft mulch. At 2 inches: 0.62 cubic yards or 9 bags. At 4 inches: 1.23 cubic yards or 17 bags. Add 10% to each value before ordering.
200 sq ft at 3 inches needs 1.85 cubic yards or 25 bags of 2 cu ft mulch. At 2 inches: 1.23 cubic yards or 17 bags. At 4 inches: 2.47 cubic yards or 34 bags. At 1.85 yards, bagged mulch is still competitive with bulk.
One cubic yard covers 324 sq ft at 1 inch, 162 sq ft at 2 inches, 108 sq ft at 3 inches, 81 sq ft at 4 inches, and 65 sq ft at 5 inches deep. Multiply cubic yards by 324, then divide by depth in inches to get your coverage.
Mulch coverage per yard at the standard 3-inch depth is 108 square feet. At 2 inches: 162 sq ft per yard. At 4 inches: 81 sq ft per yard. Use the formula: Coverage = 324 / Depth (in) to calculate coverage per yard at any depth.
A mulch square footage calculator converts area and depth to volume (cubic yards and bags). A coverage calculator works in reverse - it shows how much area a given volume covers. Both use the same formula. Use this page to go from sq ft to yards, and the coverage calculator to go from yards to sq ft.
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