Compost Calculator
Cubic yards & bags of compost for beds and lawns
Amending soil or topdressing a lawn with compost? Enter the area and depth to get the cubic yards and bags you need.
How much compost to add?
Topdress a lawn with ¼–½ inch; amend a new bed with 2–3 inches worked into the soil. The math is area × depth.
Frequently asked questions
How thick should compost be on a garden bed?
2–3 inches worked into the top layer for a new bed; ¼–½ inch to topdress an established lawn.
How many bags of compost in a cubic yard?
About 18 standard 1.5-cubic-foot bags (27 ÷ 1.5).