One Rep Max Calculator
Estimate your maximum single lift from a submaximal set.
93.3 kg
estimated 1RM
- 95% (2-3 reps)
- 88.7 kg
- 90% (3-4 reps)
- 84.0 kg
- 85% (5-6 reps)
- 79.3 kg
- 80% (7-8 reps)
- 74.7 kg
- 70% (12 reps)
- 65.3 kg
Formula: Epley formula
About this calculator
- Accuracy drops as rep count rises — sets under about 6 reps give the most reliable estimate.
- Always use safety bars or a spotter when testing near maximal loads.
Disclaimer: This content is provided for general educational purposes only and is not medical advice, diagnosis, or treatment. Always consult a qualified healthcare professional before making decisions about your health, exercise, or nutrition.