Which formula is most accurate?

NSCA lift-specific coefficients are recommended because they account for different fatigue curves per lift. Epley and Brzycki are solid general-purpose alternatives.

What rep range gives the best estimate?

1-6 reps produce the most reliable estimates. Sets of 8-12 become progressively less accurate.

Can I use this for overhead press?

Yes. Select Overhead Press from the exercise dropdown. It uses bench press coefficients since NSCA does not publish separate OHP data.

One Rep Max (1RM) Calculator

Estimate your 1RM using NSCA lift-specific coefficients, Epley, Brzycki, or Lombardi formulas. Select any exercise below.

Unit

Bar

Step

TM%

Round

Exercise

Weight (kg)

Reps (1-12)

Formula

* 이 게시물은 쿠팡 파트너스 활동의 일환으로, 이에 따른 일정액의 수수료를 제공받습니다.

Strength Training ProgramsApply your 1RM to 5x5, 5/3/1, and more

One Rep Max (1RM) Calculator

Frequently Asked Questions