Get a starting estimate for common building and renovation calculations. Use measured dimensions and local contractor pricing where possible; actual building requirements and project costs depend on the property and location.
Open a calculator to see its fields, method, worked example, limitations and related questions.
Estimate board feet for lumber in seconds. Enter thickness and width in inches, length in feet, and the number of boards to get a clear wood-volume estimate.
Build a quick Canadian heat pump installation estimate from floor area, an installed cost rate, upgrade costs and expected incentives.
Estimate a common roof rafter’s length from the horizontal run and vertical rise, with an optional overhang.
Estimate roof replacement costs in CAD from roof area, a contractor’s per-square-foot rate, removal fees and a contingency allowance.
For the most useful estimate, measure the actual roof or conditioned floor area and enter a current local rate. Construction calculators cannot account for hidden damage, site access, permits, product availability or every code requirement. Use the result to frame questions for a contractor, not to replace an inspection or engineered plan.
All calculators are available free and work in your browser. To suggest a correction or a new tool, use the contact page.
No. They are planning calculations based on the values entered. Ask contractors for written quotes with the same scope.
The tools accept your measurements and prices. Building codes, labour rates, taxes and incentive programs can differ by province and municipality.
No. The rafter calculator estimates geometry only. Have structural sizing and code requirements checked by a qualified professional.
Check the measurements, waste allowance, grade and supplier conventions before purchasing.
Only if a rate you enter already includes tax. Confirm tax treatment with your supplier or contractor.