Calculate your 1RM and get training percentages for progressive overload
This calculator estimates your deadlift one-rep max (1RM) based on a submaximal lift you've completed. Here's how to get accurate results:
For best accuracy, use a weight you lifted for 3-8 reps. Single reps give you your actual 1RM, while sets above 12 reps become less accurate for strength prediction.
Different formulas exist for estimating one-rep max because no single equation perfectly predicts strength across all individuals. Each formula has strengths:
The calculator shows results from your selected formula. Advanced lifters often test their true 1RM periodically, while beginners should focus on submaximal training and estimate their max for programming purposes.
The training percentage table shows recommended weights for different training goals:
Most training programs cycle through these intensities. A typical week might include light technique work, moderate volume sets, and one heavy day.
Strength standards compare your deadlift to general population benchmarks. These are approximate guidelines based on bodyweight ratio:
These are general benchmarks. Factors like age, training history, technique, and biomechanics affect individual strength levels.
Most 1RM formulas are accurate within 5-10% for sets of 3-8 reps performed with good form. Accuracy decreases with higher rep ranges and when form breaks down. Individual factors like training experience, lifting technique, and muscle fiber composition affect accuracy.
No. Your calculated 1RM is an estimate for programming purposes. Most strength programs use 85-95% of your 1RM for heavy training days. Attempting a true 1RM carries injury risk and should only be done with proper preparation, warm-up, and preferably supervision.
Most lifters recalculate every 4-8 weeks based on new rep maxes achieved in training. Testing a true 1RM should be done sparingly—perhaps every 12-16 weeks or before a competition—as maximum attempts are taxing and carry higher injury risk.
The Epley formula is most common in powerlifting and strength training. If you find your calculated max is higher than your actual performance, try the more conservative Brzycki formula. You can also average multiple formulas for a middle estimate.
Yes, but beginners should focus on learning proper form and building base strength rather than chasing max numbers. Use the calculator to track progress and inform training weights, but avoid attempting true 1RMs until you have 6-12 months of consistent training experience.
Increase your 1RM through progressive overload: gradually increase training volume and intensity over time. Use the training percentage table to structure your programming. Focus on technique, accessory exercises (Romanian deadlifts, deficit deadlifts, rows), and adequate recovery between heavy sessions.
Each formula was developed from different athlete populations and statistical models. Some formulas are more conservative while others are more aggressive. Individual differences in muscle fiber type, technique efficiency, and training background affect which formula best matches your actual strength.