VRF Refrigerant Charge Calc

Stop guessing trim charge: enter your liquid-line runs and get the exact extra refrigerant from g/m tables. Built for VRF and VRV installers.

The VRF and multi-split installer's commissioning calculator — combination ratio and additional refrigerant charge in one honest tool.

Enter the outdoor unit's capacity (kW or kBtu/h) and its factory charge, add your indoor units, then log every field-installed liquid-line run: length in meters, diameter from 1/4" to 3/4" (6.35–19.05 mm). The app applies the grams-per-meter table per diameter, shows the additional charge in grams and kilograms, the total charge (factory + additional), and the indoor/outdoor combination ratio with a clear verdict against the 50–130% band.

CHARGE PROFILES • Generic R-410A g/m table built in • Carrier-style sample profile from a published service manual • Custom profile: type your model's own g/m values per diameter — saved on the device

PRO — REQUIRES SEPARATE PURCHASE • Multi-split / VRF: two or more indoor units (free covers a single split) • Brand sample and custom charge profiles • Piping limit checks: total length, farthest equivalent length, outdoor–indoor and indoor–indoor height differences • Save calculations to history • Share clean PDF reports

Free forever: single-split additional charge with the generic R-410A profile and plain-text sharing.

Built for gloves and sunlight: big keypad, huge results, Outdoor Bright mode.

Everything stays on your phone — fully offline, no account, no tracking.

Results are planning estimates; always verify with the manufacturer's installation manual.

Note: features listed under PRO require a separate purchase — an auto-renewable subscription (monthly or yearly) or a one-time Lifetime unlock.

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