Compost calculator
Enter the bed area and how deep a layer of compost you want to add. You'll get the volume and bag count.
Top-dress beds with 2–5 cm (1–2 in) of compost per season.
Cubic feet
4
compost needed
Cubic yards
0.15
for bulk delivery
Bags (1.5 cu ft)
3
rounded up
How this is calculated
Volume = area × depth ÷ 12. A 1–2 in top-dressing once or twice a year is plenty for most vegetable beds; work it into the top inch or leave it for worms to pull down. For a brand-new bed, 2–3 in dug in is reasonable.