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. Imperial and metric on every tool.
Recently added
New tools ship every few weeks. See the full library →
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Refrigeration
PT Chart
Pressure-temperature lookup and full chart for R-410A, R-32, R-454B, R-22, and R-404A.
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Refrigeration
Delta T
Cooling temperature split across the coil, or furnace rise checked against the nameplate range.
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Refrigeration
Refrigerant Charge
Charge adjustment by line set length for R-410A, R-22, R-32, and R-454B.
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New calculators added regularly.
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