Refrigerant Line Charge Calculator — Calculate AC Refrigerant Line Charge

Refrigerant Line Charge Calculator

Calculate the proper refrigerant line charge for HVAC and refrigeration systems. Determine the correct refrigerant amount based on line length, diameter, refrigerant type, and system specifications.

Step 1: Line Specifications

Understanding Line Charge

Proper refrigerant line charge calculation is essential for HVAC system efficiency. Too little refrigerant reduces cooling capacity, while too much can damage the compressor and reduce efficiency.

Step 2: Refrigerant Parameters

75°F
10%

About Refrigerant Density

Refrigerant density varies by type and temperature. Higher temperatures typically decrease density, requiring more refrigerant to fill the same volume. Always refer to manufacturer specifications for precise calculations.

Refrigerant Charge Results

Summary
Refrigerant Comparison
Breakdown

Total Refrigerant Charge Required

2.4 oz
For 50 ft of 5/16″ vapor line with R-22
Line Volume
0.24 cu.ft
Refrigerant Density
0.64 oz/cu.ft
Safety Factor
10%
Ambient Temperature
75°F

Refrigerant Type Charge Comparison

Refrigerant Type Density (oz/cu.ft) Required Charge Line Volume

Line Charge Process Breakdown

Refrigerant Charge Formula

Refrigerant Charge = π × (Diameter/2)² × Length × Density × Safety Factor

To calculate refrigerant charge: Calculate line volume using cylinder volume formula, multiply by refrigerant density at ambient temperature, then apply safety factor for optimal system performance.

Need Professional HVAC Analysis?

Connect with our HVAC experts for detailed system analysis, refrigerant charge verification, and custom solutions for your heating and cooling systems.

Get Professional Analysis