Professional HVAC calculators for technicians. All apps work 100% offline.
Calculate superheat and subcooling for 10 refrigerants. Smart diagnostics with charge status and recommendations.
AvailablePressure-temperature saturation chart for all common refrigerants. Bubble and dew points for blends.
AvailableSize ductwork by CFM, velocity, and friction rate. Round, rectangular, and flex duct support.
AvailableManual J BTU estimation for residential cooling and heating. Room-by-room or whole house.
AvailableCalculate additional refrigerant charge for HVAC line sets. 10 refrigerants, oz/lbs/grams.
AvailableCalculate CFM from temperature delta, duct velocity, or static pressure. Sensible and total heat.
AvailableDry bulb, wet bulb, dew point, humidity ratio, enthalpy. Full psychrometric property lookup.
AvailableOhm's law, amperage, voltage drop, wire sizing, breaker sizing for HVAC equipment.
AvailableConvert BTU, tons, kW, PSI, kPa, CFM, temperature, and all common HVAC units.
AvailableHVAC pipe sizing for hydronic systems. Copper, steel, CPVC & PEX. Flow rate, velocity & pressure drop.
AvailableCheck and size run/start capacitors. Microfarad lookup by compressor and fan motor specs.
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