Strength Training PR Estimator – Calculate Your One-Rep Max & Training Weights
Estimate your one-rep max (1RM) safely with our Strength Training Calculator. Enter your current lift weight and reps to calculate your estimated 1RM and find the right weight for any target rep range — perfect for powerlifters and strength athletes.
Calculate weight for this rep target
Strength Estimates
Enter your lift details and click Calculate to see estimates
1RM Testing Safety Tips
- Warm up thoroughly: 10-15 minutes of light cardio + dynamic stretching
- Progressive loading: Build up to heavy weights gradually
- Use a spotter: Essential for bench press and squats
- Good form: Never sacrifice form for weight
- Rest between attempts: 3-5 minutes between heavy attempts
Note: These formulas are most accurate for 1-10 rep ranges. For best results, test with weights you can lift for 3-5 reps. Different formulas may give slightly different results - use the one that matches your training style.
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