Soil and mulch volume
Estimate fill volume and bag count for rectangular beds or circular areas.
Your inputs
The editable example is illustrative. Enter your own dimensions, operating data, prices, and fees. Results update as you edit.
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Your result
Complete the inputs to see your result.
How it works
- Volume including allowance = (L×W / π×Diameter²/4) × Depth × Quantity × (1+Waste or settling allowance (%)/100); Whole bags = ceil(1000×Volume including allowance/Volume per bag (L; zero to omit))
- Worked example: 10 m² × 0.05 m = 0.5 m³ = 500 L; ceil(500/40) = 13 Whole bags
- Supported input limits: Length: 1e-12 ≤ x ≤ 1000000000000; Width: 1e-12 ≤ x ≤ 1000000000000; Diameter: 1e-12 ≤ x ≤ 1000000000000; Depth: 1e-12 ≤ x ≤ 1000000000000; Quantity: 1 ≤ x ≤ 100000; Waste or settling allowance (%): 0 ≤ x ≤ 1000; Volume per bag (L; zero to omit): 0 ≤ x ≤ 1000000000000
Assumptions and limitations
Enter measured dimensions in the selected length unit; area, opening and pack coverage values use m². Allowances apply once and only purchases round upward. This estimates material quantities, not structural design, cutting layouts or installation standards. Product coverage and yields must come from your actual product.
Sources
- NIST — conversion factor conventions Sources reviewed: 2026-10-06
- NIST — conversion factor table B.8 Sources reviewed: 2026-10-06
- OpenStax — rectangle areas and dimensional measures Sources reviewed: 2026-10-06
- OpenStax — circle area and circumference Sources reviewed: 2026-10-06
