Free tools · metric
Trade calculators for Canadian exams
Metric calculators for the maths on Red Seal exams. Each one shows the formula and a worked example, and runs in your browser with no account.
Electrician
Plumber
Carpenter
- Metric Stair CalculatorRisers = round(Total rise ÷ Target riser) · Riser = Total rise ÷ Risers · Run = (Risers − 1) × Tread
- Rafter Length and Roof Pitch CalculatorFactor = √(1 + (rise ÷ 1000)²) · Rafter = Run × Factor
- Concrete Volume Calculator (m³)Volume (m³) = L × W × (Depth mm ÷ 1000) × Count × (1 + Waste %)