How to Calculate Your One Rep Max
Follow these simple steps to accurately estimate your one rep max using our calculator.
1
Enter the weight you lifted
Input the total weight you successfully lifted in your set. Make sure to use the same unit (lbs or kg) consistently.
2
Enter number of reps
Specify how many repetitions you completed with that weight. For best accuracy, use 1-10 reps.
3
Click calculate
Press the calculate button to instantly get your estimated one rep max and training percentages.
4
Get your 1RM, percentage max, and rep range
View your estimated 1RM along with percentage breakdowns and recommended rep ranges for training.
Tips for Accurate Results
- •Use weights you can lift with proper form for the specified number of reps
- •For best accuracy, test with 3-5 reps rather than very high rep ranges
- •Ensure you're well-rested and properly warmed up before testing
- •Recalculate your 1RM every 4-6 weeks to track progress accurately