Refrigerant Charge Calculator

Last updated: 2026-08-24

Refrigerant Charge Calculator — Calculate refrigerant charge.
Inputs
Result
Enter values and press Calculate

How to use it

  1. Calculate carga base: 3.5 kW × 0.04 kg/kW = 0.140 kg
  2. Calculate tramo with carga extra: 10 m - 5 m = 5 m
  3. Calculate carga additional R32: 5 m × 0.02 kg/m = 0.100 kg
  4. Add cargas: 0.140 + 0.100 = 0.240 kg total
  5. Verify subenfriamiento (8-12 K) and recalentamiento (5-8 K) tras the carga

Common mistakes

  • ⚠️ Load without hacer vacío previo — the humedad forms ácidos that dañan the compresor
  • ⚠️ Exceso of carga — reduces efficiency and can dañar the compresor per golpe of net amount
  • ⚠️ Not verifying subenfriamiento and recalentamiento — are the indicador is current is of carga correct

Worked example

Calculate for 10m pipe, 3/8 inch.

Carga base: {carga_base_kg} kg. Carga extra per línea: {carga_extra_kg} kg. Carga total: {carga_total_kg} kg.

Input guide

FieldTypical range
potencia_eq_kwUnit cooling capacity. Residential: 2-5 kW, Light commercial: 5-15 kW
longitud_linea_mPipe length between indoor and outdoor unit. Pre-charged: 3-5 m, Standard: 5-15 m, Long: 15-50 m