Mulch Calculator — How Much Mulch Do I Need
Calculate mulch quantities for beds, borders, and paths.
How We Calculate This
Volume is calculated as: Length × Width × Depth (converted to metres).
The calculator converts volume into 60-litre bags (a common retail size) and bulk bags (0.85 m³).
Weight is estimated using typical densities: bark ~350 kg/m³, wood chip ~300 kg/m³, gravel ~1500 kg/m³, compost ~500 kg/m³.
Frequently Asked Questions
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Last updated: February 2026
All calculations are estimates based on standard gardening guidelines. Results may vary with soil conditions, climate, and plant varieties.