Powerlifting Training Max
Calculate 1RM and training max from submaximal lifts with RPE. Enter values for instant results with step-by-step formulas.
Formula
1RM = Weight × (1 + Reps/30); Training Max = 1RM × 0.85-0.90
Worked Examples
Example 1: Bench Press Estimate
Problem:Lifter benches 185 lbs for 8 reps at RPE 8. Calculate estimated 1RM and training max.
Solution:Epley: 185 × (1 + 8/30) = 185 × 1.267 = 234 lbs\nBrzycki: 185 × (36/(37-8)) = 185 × 1.241 = 230 lbs\nLombardi: 185 × 8^0.10 = 185 × 1.23 = 228 lbs\n\nAverage: (234 + 230 + 228) / 3 = 231 lbs\n\nRPE 8 adjustment (could do 2 more):\n231 × 1.06 = 245 lbs estimated true 1RM\n\nTraining max (90%): 245 × 0.90 = 220 lbs\n\nWorking weights from TM:\n85% = 187 lbs (5 reps)\n75% = 165 lbs (8 reps)\n65% = 143 lbs (warm-up)
Result:Estimated 1RM: 245 lbs | Training Max: 220 lbs
Example 2: Squat PR Analysis
Problem:Squatted 315 lbs for 3 reps at RPE 9.5 (almost maxed). Find 1RM and percentages.
Solution:Epley: 315 × (1 + 3/30) = 315 × 1.10 = 347 lbs\nBrzycki: 315 × (36/(37-3)) = 315 × 1.059 = 334 lbs\nLombardi: 315 × 3^0.10 = 315 × 1.116 = 352 lbs\n\nAverage: 344 lbs\n\nRPE 9.5 adjustment (0.5 reps left):\n344 × 1.015 = 349 lbs\n\nPercentage chart:\n100% = 349 (max attempt)\n95% = 332 (heavy single)\n90% = 314 (opener)\n85% = 297 (strength work)\n80% = 279 (volume work)
Result:Estimated 1RM: 349 lbs | Competition opener suggestion: 314 lbs
Example 3: Deadlift Volume Day
Problem:Did 405 lbs for 5 reps at RPE 7 (felt easy, had 3+ left). What's true max?
Solution:Epley: 405 × (1 + 5/30) = 405 × 1.167 = 473 lbs\nBrzycki: 405 × (36/(37-5)) = 405 × 1.125 = 456 lbs\nLombardi: 405 × 5^0.10 = 405 × 1.175 = 476 lbs\n\nAverage: 468 lbs\n\nRPE 7 adjustment (3 reps left = significant reserve):\n468 × 1.09 = 510 lbs\n\nThis seems high! RPE 7 on a 5-rep set suggests:\n- Either very strong and sandbagging\n- Or RPE was underestimated\n\nMore conservative estimate (assuming RPE was really 8):\n468 × 1.06 = 496 lbs\n\nRecommendation: Test with heavier weight to verify.
Result:Estimated 1RM: 496-510 lbs | Verify with heavier test set
Frequently Asked Questions
What is a training max vs true 1RM?
A training max is typically 90-95% of your true 1RM, used to calculate working weights for programs. True 1RM is the absolute maximum you can lift once with maximum effort. Training max provides a buffer for sustainable progress and reduces injury risk. Most programs like 5/3/1 use 85-90% of tested max.
What is RPE in strength training?
RPE (Rate of Perceived Exertion) is a 1-10 scale measuring effort. RPE 10 = maximum effort, nothing left. RPE 8 = could do 2 more reps. RPE 7 = could do 3 more. Used to autoregulate training—adjusting weights based on daily readiness rather than fixed percentages.
What's the difference between powerlifting and weightlifting maxes?
Powerlifting: squat, bench, deadlift with slower, grinding lifts. Weightlifting (Olympic): snatch, clean & jerk requiring speed and technique. Max calculation formulas work better for powerlifting; Olympic lifts depend more on technique than raw strength.
Why does my calculated max seem too high/low?
Possible reasons: high-rep sets inflate estimates (fatigue not modeled), technique breakdown at heavy weights not captured, you're better/worse at singles than reps, or form differences between rep work and maxes. Calibrate by occasionally testing.