Mulch Calculator

Estimate how much mulch you need for garden beds, borders and around trees. Enter the area to cover and the desired depth — the calculator reports the volume in cubic metres, cubic yards and the number of standard 2 ft³ bags.

Enter area and depth

Units
In metres (or feet).
In centimetres (or inches). Recommended: 5–8 cm (2–3 in).
Based on a standard 2 ft³ (56 L) bag.

Enter bed dimensions and depth, then press Calculate mulch.

Mulch formulas

Volume = area × depth

1 m³ ≈ 1.308 yd³ ≈ 35.3 ft³

Standard bag = 2 ft³ = 0.0566 m³

Recommended depths

  • Garden beds: 5–8 cm (2–3 inches)
  • Around trees and shrubs: 5–10 cm (2–4 inches), kept away from the trunk
  • Weed suppression / new beds: 8–10 cm (3–4 inches)

Gravel Calculator

Gravel volume and weight.

Square Footage Calculator

Area calculator for any space.

Frequently asked questions

5–8 cm (2–3 inches) is ideal for most garden beds. Deeper than 10 cm can suffocate plant roots and hold too much moisture. Around trees, keep mulch a few centimetres away from the trunk to prevent rot.

Bulk delivery is almost always cheaper per cubic metre for projects larger than about 2–3 m³. Bagged mulch is more convenient for small areas and easier to transport yourself.