Refrigerant Charge Weighing
Charge in oz from line-set length, diameter, and refrigerant.
Example
You enter
- Refrigerant R-410A
- Sections diameter 3/8, length (ft) 25; diameter 1/2, length (ft) 5
You get
- Total charge 19.75 oz
- Total charge (lb) 1.234
Checked against published worked examples from: Chemours / Honeywell published refrigerant-line charge oz/ft tables.
Details, formula, and sources
Formula or tableLine-set charge (oz) = sum over line sections of oz_per_ft(refrigerant, line diameter) x section length; lb = oz / 16. Per-foot values from manufacturer line-set tables (oz/ft). The factory charge and any rated-length credit come from the unit's data plate and are not included.
Source and editionManufacturer line-set bulletins (Daikin, Carrier, Trane, Rheem) by name.
Free accessFree at each manufacturer site.
What governsEstimate. AHJ and licensed mechanical contractor govern. ACCA Manual J / D / S supersede rules of thumb.
API field namesrefrigerant, sections, total_oz, total_lb
- Per-foot adder table data/hvac/charge-per-foot.jsonmanufacturer-attributed per row