Measure lifting potential from recent performance data. Review formula differences, rounding options, and exportable reports. Train smarter using instant estimates, charts, and planning tools.
This tool estimates a strong double from a recent performance set. Use consistent technique, adequate rest, and practical load jumps.
The chart compares estimated two rep maximum values across common formulas.
Example results use the average method before display rounding.
| Lifted Weight | Reps | Estimated 2RM | Estimated 1RM |
|---|---|---|---|
| 80 kg | 5 | 86.77 kg | 92.5 kg |
| 100 kg | 3 | 102.97 kg | 109.8 kg |
| 65 kg | 8 | 75.65 kg | 80.63 kg |
| 225 lb | 4 | 237.96 lb | 253.71 lb |
| 140 lb | 2 | 140 lb | 149.28 lb |
Epley: 1RM = weight × (1 + reps ÷ 30)
Brzycki: 1RM = weight × 36 ÷ (37 − reps)
Lombardi: 1RM = weight × reps0.10
O'Conner: 1RM = weight × (1 + reps ÷ 40)
Mayhew: 1RM = 100 × weight ÷ (52.2 + 41.9 × e−0.055 × reps)
Each formula uses its own inverse relationship to estimate the load you could lift for exactly two repetitions. The average option combines all five methods for a balanced estimate.
Different formulas weigh rep performance differently. Lower rep sets often produce tighter estimates. Comparing methods helps you see a realistic range instead of trusting one model blindly.
A 2 rep max is the heaviest weight you can lift twice with proper technique. It sits just below your one rep max and is useful for strength programming.
It is an informed estimate, not a guarantee. Accuracy improves when your input set is challenging, recent, and performed with stable form under normal training conditions.
Use the average option when you want a balanced prediction. Use a single formula when you already prefer a method or want consistency across repeated testing.
Yes, but lower rep sets usually estimate heavy doubles better. Predictions from very high rep sets can drift because fatigue affects performance more strongly.
Each equation was built from different assumptions and data patterns. That changes how aggressively it scales from your performed reps to heavier projected lifts.
It gives you a lighter training target based on your predicted 2RM. This helps with planning practice sets, technique work, or submaximal progression sessions.
Yes, rounding makes the result usable in real gyms. Choose an increment that matches your available plates or your normal loading strategy.
Yes, but beginners should treat estimates cautiously. Technical improvement changes strength quickly, so actual testing and coaching feedback still matter most.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.