Refrigerant Charge Calculator

Refrigerant charge calculator for HVAC. Line sets, 10 refrigerants, oz/lbs/g

Refrigerant charge calculator for HVAC line sets. Calculate additional refrigerant charge based on liquid and suction line length and diameter — for 10 refrigerants.

Built by HVAC techs, for HVAC techs.

FEATURES:
• Calculate additional refrigerant charge for copper line sets
• 10 refrigerants: R-410A, R-22, R-454B, R-32, R-407C, R-134a, R-404A, R-507A, R-290, R-717
• Liquid line diameters: 1/4" to 1-1/8"
• Suction line diameters: 3/8" to 2-5/8"
• Results in ounces, pounds, and grams
• Warnings for unusually long line sets
• Industry-standard charge-per-foot data

100% OFFLINE:
Works without internet connection. All refrigerant charge data is built into the app — no server calls, no delays.

HOW IT WORKS:
1. Select your refrigerant type
2. Enter liquid line length and diameter
3. Enter suction line length and diameter
4. Get instant charge calculation in oz, lbs, and grams

WHY YOU NEED THIS:
When installing split systems, mini-splits, or any equipment with long line sets, the factory charge only covers a standard line length (typically 25 ft). Every extra foot of copper tubing needs additional refrigerant. This calculator gives you the exact amount based on industry charge-per-foot tables.

SUPPORTED REFRIGERANTS:
R-410A (residential AC & heat pumps), R-22 (legacy systems), R-454B (next-gen R-410A replacement), R-32 (mini-splits & VRF), R-407C (commercial AC), R-134a (auto AC & chillers), R-404A (commercial refrigeration), R-507A (low-temp refrigeration), R-290 (propane systems), R-717 (ammonia industrial)

PRO UPGRADE ($2.99 one-time):
• Save calculation history
• Export professional PDF reports
• Dark theme
• No ads

ACCURACY:
Charge-per-foot values sourced from manufacturer installation guides and HVAC reference tables. Covers both liquid and suction line contributions for accurate total charge calculations.

PERFECT FOR:
• HVAC technicians installing split systems
• Mini-split installers
• Refrigeration mechanics
• AC contractors and service techs
• HVAC students and apprentices
• Building maintenance engineers

Accurate refrigerant charge calculations for every installation and service call.