REFRIGERATION / FIELD CALCULATOR
Know what’s
inside your lines.
Copper pipe volume. Refrigerant mass.
One clear calculation, in both unit systems.
BEHIND THE NUMBERS
Simple geometry.
Real fluid properties.
V = π × (ID ÷ 2)² × L
Inside diameter is outside diameter minus twice the wall thickness. Pipe length is the actual physical length; fittings and equipment are excluded.
m = V × ρ
Density depends on refrigerant and state. Saturation estimates use CoolProp density correlations ↗ and the Chemours R-410A liquid equation ↗. These are property estimates. Blends use liquid bubble-point or vapour dew-point density.
Dimensions, accuracy & sources +
ACR presets follow the ACR copper tube dimensions table. The soft ¾-inch preset uses a 0.035-inch wall; other walls can be entered manually. Type L nominal sizes use Copper Development Association dimensions. Verify the actual tube dimensions for your installation.
Saturation ranges are shown for the selected refrigerant: −40 to 50 °C for added blends, −40 to 60 °C for other fluids, and −40 to 30 °C for R-744 (CO₂) to stay below its critical point. Added refrigerants use offline CoolProp 7.2.0 saturation tables with linear interpolation at 1 °C intervals (0.25 °C for CO₂). Tables use Q=0 for liquid and Q=1 for vapour; blend compositions follow CoolProp predefined mixtures. Refrigerant selection calculates mass only; it does not establish pipe or equipment compatibility. CoolProp fits approximate fluid models and can differ from full thermodynamic calculations, especially near a critical point. No pressure input is needed for a saturated-state estimate; actual superheated or subcooled conditions require temperature and pressure to determine a known density.
US outputs use US gallons, cubic feet, cubic inches, pounds and avoirdupois ounces. These are customary units, often referred to as “SAE”; gallons are not Imperial gallons. Calculations retain full precision; displayed results are rounded. CoolProp MIT license.