1RM Calculator
Bench Press 1RM Calculator
Estimate your one rep max from any set — five formula results, plate loading and your full percentage chart.
Calculate My 1RM
Enter your weight and reps to see your estimated 1RM
Estimated One Rep Max
0 lbs
Strength level: --
Epley
0
Brzycki
0
Lander
0
Lombardi
0
O'Conner
0
Average
0
Plates Per Side
Training Percentages
| % | Weight | Reps | Goal |
|---|
Simple & Fast
How the 1RM Calculator Works
Four steps turn an ordinary set into a complete strength profile.
1
Enter your set
Type the weight you lifted and choose pounds or kilograms.
2
Add your reps
Select how many clean reps you completed — accuracy is best at 3–8 reps.
3
Optional bodyweight
Add bodyweight and sex to unlock your strength-level rating.
4
Read the results
Instantly see your 1RM, five formulas, plate loading and percentages.
Questions
1RM FAQ
Is an estimated 1RM accurate?
For sets under about 8 reps it is usually within a few percent of a true max. The average of all five formulas is the most robust single number.
How often should I retest?
Every 4–8 weeks is plenty. Estimating from a hard top set each block lets you track progress without maxing out.
Does it work for other lifts?
Yes — the same formulas apply to squat, deadlift and press.