Calculate your one-repetition maximum and full training percentage table using 4 evidence-based formulas. Built for powerlifters, athletes, and gym enthusiasts.
1RM Calculator is intended for clinical decision support only. All results must be interpreted in the context of the patient's full clinical picture. Always apply professional medical judgment. This app does not replace clinical expertise or established guidelines.
Is this app free?
Yes, 1RM Calculator is free to download and use.
Does it require an account?
No. No account or login is required.
Is my data stored anywhere?
No. All calculations happen locally on your device. Nothing is sent to any server.