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
How we build and check this calculator
This calculator runs entirely in your browser, so the numbers you enter stay on your device. The math behind it is written by hand and tested against worked examples and standard references before the page goes live.
SuperGlobalCalculator is independently built and maintained. See how we build and verify our calculators.