Refrigerant GWP & F-Gas Calculators
Free online tools for refrigeration and HVAC technicians. Look up refrigerant GWP, calculate tonnes CO₂ equivalent and leak-check frequency, or run common system and charge calculations.
Choose a Refrigerant or HVAC Calculator
For GWP and compliance work, start with the refrigerant GWP and CO₂-equivalent calculator. It converts charge in kilograms to tonnes CO₂e and checks the relevant leak-check band. You can also calculate superheat, subcooling and pressure-temperature values without signing up.
CO2 Equivalent & Compliance
Calculate tonnes CO2 equivalent from refrigerant charge, determine leak check frequency, and check GWP ban thresholds under EU F-Gas Regulation 517/2014.
Leak Rate & Detection
Calculate annual refrigerant leak rates, determine if systems exceed acceptable thresholds, and log refrigerant top-up quantities.
Superheat & Subcooling
Calculate superheat and subcooling from gauge readings and temperature measurements, with built-in PT data for common refrigerants.
System Performance
Calculate coefficient of performance (COP), energy efficiency ratio (EER), and total equivalent warming impact (TEWI) for refrigeration and heat pump systems.
Charge Limits & Recovery
Calculate maximum refrigerant charge limits for A2L and A3 refrigerants per EN 378, and safe fill levels for recovery cylinders.
Refrigerant and F-Gas Tools for UK Technicians
These calculators help refrigeration and HVAC technicians, engineers, and contractors perform common F-Gas and system-performance calculations. Each tool shows its regulatory, standards or training reference so you can check the basis used.
Referenced Methods
UK F-Gas, retained EU 517/2014 and EN 378 references are shown where applicable
Instant Results
Get answers immediately — no sign-up or download required
Mobile Friendly
Use on any device — perfect for field calculations on site