Pocket HVACFree HVAC calculators for techs
The numbers you need in the palm of your hand: superheat, subcooling, PT charts, duct sizing and psychrometrics, built for your phone.
- Checked against NIST and ASHRAE
- °F and °C, psig and kPa
- No sign-up, no app
Superheat
Suction side. Dew point for blends.
Subcooling
Liquid side. Bubble point for blends.
Ductulator
Size duct by CFM and friction rate.
Wet bulb & dew point
From dry bulb and humidity, any elevation.
PT charts
All tools
Charging
Airflow and ducts
Air properties
What is Pocket HVAC?
Pocket HVAC is a free set of HVAC calculators and refrigerant PT charts, built by an HVAC tech to use on a phone at the unit. Every tool shows its formula and the published sources it's checked against, from NIST refrigerant data to the ASHRAE Handbook and California's Title 24. No sign-up, no app.