Dumpster Size Calculator

Debris is measured in place — a slab, a stack of cabinets, a floor area times its thickness — and then it gets broken up, which makes it take more room than it did as built. The bulking factor you set accounts for that: clean stacked timber bulks very little, lath-and-plaster or roofing a great deal. On top of that, no container ever fills completely, so the fill efficiency accounts for the air around awkward shapes. Container needed = measured × bulking ÷ efficiency, and both factors are yours.

Nearly every hire includes a tonnage allowance, and heavy debris reaches it long before the box is full. With a bulk density the page works out what the load weighs, compares it with the allowance, and — when the weight is the binding limit — says at what volume the allowance runs out, which is often a quarter of the container. Concrete, soil, tile, plaster and roofing are the loads where this happens. The overweight rate turns the excess into the figure that will appear on the invoice.

No container catalogue, hire price, permit requirement or landfill restriction is stored: sizes, allowances, rates and what may be mixed in one load come from your hauler and your local rules. Soil, concrete, tyres, appliances, mattresses and anything hazardous are usually a separate load or refused outright. Densities are yours from the hauler or a materials table. Nothing leaves the browser; the same four anonymous usage counts as the rest of the site apply.