Topsoil & Mulch Calculator — m, m³, bags
How to use this calculator
Choose your area shape — rectangle, circle, L-shape, or direct custom area — and enter dimensions in meters or centimeters from the dropdown. Select the material type, set the depth, and adjust waste. Results update instantly with volume in m³, bag count, weight in kg, and truck loads.
Material — eight types with densities: topsoil, garden soil, compost, wood chip mulch, bark mulch, rubber mulch, peat moss, and sand.
Bags — choose 25 L, 40 L, or 50 L bags.
Cost — price per bag or per m³ with optional delivery fee. Select currency (EUR, PLN, etc.).
Saved Calculations
| Time | Shape | Material | Area m² | Vol m³ | Bags | Weight | Cost |
|---|
How to Calculate Topsoil & Mulch (Metric)
This calculator estimates the volume of topsoil, mulch, compost, or other landscape materials in cubic meters and bags. Enter dimensions in meters, centimeters, or millimeters for rectangle, circle, L-shape, or custom area. Set depth (5–15 cm for mulch, 10–30 cm for topsoil) and get instant results.
Formulas
Volume (m³) = Area (m²) × Depth (m). For a rectangle: Area = Length × Width. For a circle: Area = π × (D/2)². Bags = Volume (litres) ÷ bag size. Weight = Volume × density (kg/m³). Truck loads = Volume ÷ 10 m³.
Material Densities
Topsoil: ~1 200 kg/m³ · Garden soil: ~1 070 kg/m³ · Compost: ~600 kg/m³ · Wood chip mulch: ~360 kg/m³ · Bark mulch: ~300 kg/m³ · Rubber mulch: ~710 kg/m³ · Peat moss: ~240 kg/m³ · Sand: ~1 600 kg/m³.
FAQ
How deep should I apply mulch? 5–8 cm for flower beds, 8–10 cm for pathways, up to 15 cm for weed suppression. How deep for topsoil? 10–15 cm for new lawns, 20–30 cm for garden beds. All estimates are for planning purposes.
