Mushroom Compost Calculator
Mushroom compost is a popular, affordable soil amendment. Enter your bed size and depth for cubic yards and bags.
Shape
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Area: 0.0 sq ft
Planning more than one thing? Open the Yard Planner → to trace your whole yard over an aerial photo and total every material at once.
How to measure for compost
- Measure the length and width of your area in feet.
- Multiply them for square feet (or just enter length and width above).
- Choose a depth — we default to 2 inches for compost.
- Read your total in cubic yards, or the number of bags.
Mushroom Compost coverage at a glance (2" deep)
| Area (sq ft) | Cubic yards | Bags |
|---|---|---|
| 100 | 0.7 | 19 |
| 200 | 1.4 | 37 |
| 300 | 2.0 | 56 |
| 500 | 3.4 | 92 |
| 1,000 | 6.8 | 184 |
Includes a 10% overage allowance. Estimates are low-fi — confirm with your supplier.
Frequently asked questions
How much mushroom compost should I add?
Work a 1–3 inch layer into the top several inches of soil for beds. Enter your area with that depth above.
Can I use mushroom compost everywhere?
It's great for most beds but can be salty for seedlings and salt-sensitive plants — mix it in rather than planting directly into it.