Construction
Mulch Calculator
Volume and 50 L bag count for mulching a garden bed at a chosen depth.
Inputs
Mulch Calculator
Result
Mulch needed
600 L
- Volume
- 0.6 m³
- 50 L bags
- 12
- Coverage per 50 L bag at 7.5 cm
- 0.67 m²
How it's calculated
volume(L) = length × width × depth × 1000 (m × m × m)
Common questions
How deep should mulch be?
5–8 cm (2–3 in) is typical for garden beds. Deeper mulch retains more moisture but can suffocate roots and encourage rot near stems.
How often should I re-mulch?
Organic mulches break down over 1–2 seasons. Top up 2–3 cm each year to maintain coverage; refresh fully every couple of years.
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