One Rep Max (1RM) Calculator

Calculate your one rep max (1RM) for any lift. Your one-rep max is the max weight you can lift for a single repetition for a given exercise. To lift safely, a one rep max calculator is essential for determining what you can handle on the squat rack, bench, deadlift and more.

A one rep max is also a huge factor when training in the Maximal Strength phase of the NASM OPT™ Model - as the weight ranges will sit in the 85-100% range of your 1RM. Being able to gauge the correct weight to lift will help keep your workouts intense enough to develop strength.

Once you input the totals of your lifts, you will see a table of ranges that will determine where you are regarding your max lifts. Remember to calculate your 1RM for every specific lift. You don't want to assume that your bench press max will carry over to your back squat max.

Remember, the values are only estimates. Be sure to consult a personal trainer - or become one yourself - to ensure you are lifting safely. Check out our other fitness calculators as well to get the clearest picture of your overall fitness level: BMI Calculator and Calorie Calculator

The bench press is one of the most popular ways of building explosive strength and a strong chest. If you are using this one rep max calculator to actively track your max lifts, consider trying these ways to maximize your bench. These tips are meant for experienced lifters. Be sure to never push yourself if you do not have the proper technique, strength, or a safe lifting environment.

Here is a list of 4 ways to increase your bench press max:

1. Lift with proper form: Kinsey Mahaffey, in this blog on maximizing your bench press, says to properly bench you should: (1) Lie on your back with a neutral spine (not pressing down into the bench, and not over-arching), with feet flat on the floor with the toes straight ahead. Grab the barbell at 1.5 – 2x shoulder width, with hands evenly spaced. Draw in and brace the abs and pull the shoulder blades down and back. (2) Unrack the bar (a spotter can be especially helpful here!) to bring it directly above the shoulders. Lower the bar toward the mid to lower chest, going as low as you can control with good form. (3) Squeeze the abs and glutes and drive through your feet on the floor as you exhale and press the bar back up to the starting position.
2. Increase Weight & Lower Rep Range: Remember, to increase maximal lifts according to the OPT ™ model, you need to keep your rep range within a strategic amount: Accomplishing this requires maximal efforts and lifting near-max/maximal loads during resistance training—ranging anywhere from 85-100% of a client’s one-rep max—for 1-5 repetitions.
3. Try Different Set Formats: Horizontal loading - or straight sets - is the typical setup for lifting programs. But you can experiement with different set formats like pyramid sets (as an example). To perform a pyramid set, you would gradually increase your weight for each set while the number of reps decreases in relationship to the uptick in weight.
4. Train Your Synergists: Don't neglect your synergists, as they assist the primer movers within the bench. These additional muscles to train are the anterior deltoids, triceps, and rotator cuffs. Don't underestimate the importance of accessory work of the synergists for improving your bench press max!