A2L Safe Charge

The field calculator built for the A2L era. Looking for a Check & Charge replacement? A2L SafeCharge picks up where legacy apps left off — with full R-454B and R-32 support, no corporate account, and no sign-in. WHAT IT DOES • Superheat and subcooling calculator for R-454B, R-32, and R-410A • PT data sourced from NIST REFPROP — the same data OEMs use, with the source cited on every result • Automatically uses dew point for superheat and bubble point for subcooling on R-454B — the most common A2L charging error, handled for you • Enter your OEM nameplate target and see how your reading compares • Max allowable charge calculator — enter room dimensions and unit location, get a passive charge limit based on A2L safety guidelines • Save job history and export a professional one-page PDF field report with your company branding • A2L quick reference — refrigerant comparison, bubble/dew point explainer, and A2L safety rules — all offline BUILT FOR THE FIELD No account. No internet required. Your job data stays on your phone. Opens fast, returns a clear answer, gets you back to work. 100% FREE Every feature is included — calculators, history, PDF reports. A small ad keeps it free. No subscriptions, no paywalls, no upsells.