Mulch, Soil & Compost Calculator
Enter your bed dimensions and desired depth to get cubic yards, cubic feet, and bag counts.
Bed dimensions
Typical: 2–3 in for mulch; 6–12 in for raised-bed soil.
Results
Total volume
105.60
cubic feet
Cubic yards
3.911
Bags needed
71
Raw volume: 96.00 cu ft (with 10% buffer: 105.60 cu ft)
Formula: length × width × depth
Round up when ordering. Mulch settles 10–20% over the first month; soil and compost compact slightly once watered.
Mulch
Spread 2–3 in deep around established plants. Keep mulch a few inches away from stems and trunks to prevent rot.
Raised-bed soil
Fill beds 6–12 in deep. A mix of topsoil, compost, and aeration materials like perlite or coco coir works best.
Compost
Add a 1–2 in layer on top of beds or mix into the top few inches of soil. Finished compost should smell earthy, not sour.