Mulch Calculator: Cubic Yards to Bags
Calculate exactly how much mulch you need for garden beds and landscaping. Enter the area and depth to get results in cubic yards, bags, and estimated cost.
Garden Bed Dimensions
Mulch Needed
Formula
Cubic Yards = (Length ft × Width ft × Depth in) ÷ 324
2 cu ft bags = Cubic Yards × 13.5
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Frequently Asked Questions
How deep should mulch be?
2-3 inches is ideal for most garden beds. More than 4 inches can prevent water from reaching plant roots.
How many bags of mulch in a cubic yard?
About 13.5 bags of 2 cubic foot mulch per cubic yard, or about 9 bags of 3 cubic foot mulch.
When is the best time to mulch?
Late spring is ideal, after soil warms. Fall mulching protects roots through winter. Avoid mulching on frozen ground.
Should I remove old mulch?
Not usually. Add new mulch on top, maintaining a total depth of 2-3 inches. Remove old mulch only if it is diseased or matted.
Bags vs bulk mulch — which is cheaper?
Bulk mulch is 40-60% cheaper per cubic yard but requires delivery. Bags are convenient for small areas under 5 cubic yards.