Disclaimer

Last updated: 26 June 2026

BuildMetricLab provides free online construction calculators, material estimators, and unit converters. The results they produce are estimates for educational and planning purposes only. They are not, and must not be treated as, professional advice.

What this means in practice

• Quantities are estimates. Every real-world build has site-specific conditions (wastage, cut-offs, substrate, access) that change what you actually need. Verify every quantity with your supplier or trade contractor before ordering. We recommend building in additional contingency on top of the wastage assumptions shown.
• Costs are illustrative. Prices shown in the calculators are based on typical Canadian retail/trade rates at the time of publication. Actual prices vary by province and territory, supplier, quantity discounts, and market conditions, and are shown exclusive of GST/HST unless stated. Always get written quotes.
• No structural advice. Calculators that touch beams, headers, footings, slabs, loads, slope/grade, drainage, electrical, or gas are screening tools only. Designs that affect structural integrity, safety, or building-code compliance must be signed off by a qualified professional — a P.Eng. structural engineer, registered architect, licensed contractor, licensed plumber, licensed gas technician, or licensed electrician as required by law.
• Codes & standards. Construction in Canada is governed by the National Building Code of Canada (NBC) as adopted (and often amended) by each province and territory — for example the Ontario Building Code, the BC Building Code, or the Code de construction du Québec — together with the relevant CSA standards. This site does not determine whether any specific work requires a permit or how your local code applies — that is the owner's or contractor's legal responsibility.
• No warranty. Calculators are provided "as is". Formulas are documented on each tool page so you can check the method. We test actively but cannot guarantee every edge case. Use of this site is at your own risk.

Consumer rights (Canada)

Nothing in this disclaimer limits or excludes any rights or remedies you have under the applicable provincial or territorial consumer-protection legislation where those rights cannot be excluded by contract.

When to consult a professional

Always consult a suitably qualified professional before:

• Any structural alteration (removing walls, cutting joists, new openings, steel beams).
• Electrical, gas, or hot-water work (licensed trades only).
• Work near a property line, easement, or heritage-designated property.
• Drainage that discharges to a municipal sewer or storm system.
• Foundation, underpinning, or load-bearing work in frost-susceptible ground.
• Anything involving asbestos, lead paint, or other regulated materials.

If in doubt, don't. Get a professional.