Dumpster / Bin Size Calculator

How the dumpster / dumpster size calculator works

Recommends dumpster or dumpster size from waste volume and type. The calculator takes your dimensions and supplier rates, applies a standard Canadian trade formula, and returns a quantity with an indicative cost. Every figure is an estimate — site conditions always move the final number.

Typical Canadian drainage and earthworks wastage

Excavated soil bulks up 15–35% when lifted, so dumpster capacity fills faster than the in-situ volume suggests. Plan for a 1.25× factor when hiring away muck. Our defaults reflect common Canadian trade allowances, and can be adjusted upwards for non-standard geometry or downwards where experience supports a lower figure.

What this tool does not do

It does not replace a professional quote, factor regional pricing, assess structural adequacy, or confirm National Building Code (NBC) compliance. Those remain the responsibility of a suitably qualified designer, surveyor, or your building inspector.

On-site considerations for dumpster / dumpster size

Excavations over 1.2 m deep need shoring or battered sides — the HSE guidance on trench collapse is not optional. Check for buried services with a CAT scanner before digging.

the National Building Code (NBC) and compliance

Foul and surface water drainage to a public sewer is governed by the National Building Code and Sewers for Adoption. Dry wells need a permeability test (BRE 365) to size correctly. When in doubt, a pre-application enquiry to the municipality can give early clarity, which tends to be less costly than retrospective correction.

Before you order

Buy plastic drainage pipe in standard 3 m or 6 m lengths with integral seal joints. Cutting short lengths on site wastes material and fittings. Cross-checking the calculator’s output against a supplier quote helps catch differences in pricing assumptions — ask for exact product specifications (grade, finish, batch number) and confirm delivery timescales against your programme.

Adjusting the defaults

Every input in this calculator is editable. Enter your own dimensions, supplier prices, and wastage allowance — the output recalculates instantly. If the defaults feel off for your region or project type, your own numbers always override them.

Using this dumpster / dumpster size calculator alongside other BuildMetricLab tools

This calculator works best as part of a planning workflow. Pair the quantity with our project contingency, labour-hours, and material-cost calculators to build a complete estimate before you pick up the phone to a supplier. All BuildMetricLab tools run entirely in your browser — no sign-up, no data sent anywhere, and every formula is shown on-page so you can audit the maths.