Dumpster Size Calculator
Estimate the right dumpster size for your renovation or cleanout project.
Enter project type and debris volume to get a recommendation.
Dumpster sizing ensures you rent the right container for your project — too small and you’ll pay for a second haul; too large and you’ll overpay for unused capacity. Dumpster sizes are measured in cubic yards.
Conversion Reference:
1 cubic yard = 27 cubic feet = 0.765 cubic meters
The Volume Estimation Formula:
Project volume (cubic yards) = Length (ft) × Width (ft) × Depth (ft) / 27
Add 20% overage buffer: Required dumpster size = project volume × 1.2
Standard Dumpster Sizes:
| Dumpster Size | Dimensions (ft, approx.) | Typical Projects |
|---|---|---|
| 10-yard | 12 × 8 × 4 ft | Small bathroom remodel, garage cleanout |
| 20-yard | 22 × 8 × 4.5 ft | Kitchen remodel, deck removal |
| 30-yard | 22 × 8 × 6 ft | Whole-house cleanout, large addition |
| 40-yard | 22 × 8 × 8 ft | New construction, major demolition |
Worked Example:
Removing a wood deck: 20 ft × 16 ft, approximately 1.5 ft deep of debris:
Volume = 20 × 16 × 1.5 / 27 = 480 / 27 = 17.8 cubic yards
With 20% buffer: 17.8 × 1.2 = 21.3 cubic yards → rent a 30-yard dumpster
Weight Limits:
Dumpsters have weight limits (typically 1–4 tons). Heavy materials change the calculation:
- Concrete and brick: 1 cubic yard ≈ 1.5 tons
- Mixed household debris: 1 cubic yard ≈ 0.2–0.4 tons
- Roofing shingles: 1 cubic yard ≈ 0.8 tons
Practical Tips:
- Confirm weight limits with the rental company: exceeding them triggers per-ton overage fees
- Load heavy items first (at the bottom), lighter debris on top
- Never overfill above the rim: haulers legally cannot transport overfilled dumpsters
- Ask about prohibited items (paint, mattresses, tires, electronics) before filling