Formula & example
Subcooling=Tsat−Tliquid.
A 105°F condensing saturation temperature and 94°F liquid line gives 11°F subcooling.
HVAC engineering calculator · Updated Sep 17, 2026
HVAC Subcooling Calculator — Condensing vs Liquid Temperature
Calculate condenser subcooling from condensing saturation temperature and measured liquid-line temperature in °F or °C.
Inputs
Result
Subcooling 11°
Positive subcooling: liquid is below the entered condensing saturation temperature
Assumptions & limits
- Use the correct refrigerant saturation temperature for the measured high-side pressure.
- Target subcooling is equipment-specific and should come from manufacturer data.
Frequently asked questions
What does this HVAC Subcooling Calculator calculate?
Calculate condenser subcooling from condensing saturation temperature and measured liquid-line temperature in °F or °C.
Can I use SI and US customary units?
Yes. The calculator exposes the unit basis in the inputs and reports useful cross-unit outputs where the engineering workflow benefits from them.
Is this a replacement for HVAC design software?
No. It is a transparent deterministic engineering calculator for sizing, diagnostics and cross-checks. Final equipment, duct and refrigeration decisions should use measured conditions, manufacturer data and applicable codes or standards.