Fast. Practical. Built for the trades.
Simple calculators for HVAC, plumbing, and the trades.
TradeCalc helps techs, estimators, and contractors make quick calculations without digging through notes, spreadsheets, or old formula sheets.
Quick Reference:
Works on the job site
Sized for your phone, fast to load, no account needed. Pull it up mid-job and get back to work.
See the math, not just the answer
Every result shows the formula and the working. Useful when a client or inspector asks why.
Canadian codes and climate
Built around Canadian standards, not US ones. Metric and imperial both supported.
Calculators
Core HVAC calculators available now, with more being added regularly.
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Airflow
BTU to CFM
Convert BTU/hr to required airflow using the sensible heat formula.
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Ductwork
Duct Area
Calculate rectangular duct area in square feet using duct width and height in inches.
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Load & Heat
Heat Loss (Simplified)
Estimate required heating output using floor area and a heat loss factor.
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New calculators added regularly.
Get notified when new tools launch - no spam, just updates.