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One Rep Max Calculator
Calculate your one rep maximum (1RM) for fitness and strength training.
The one-repetition maximum calculator below will help you estimate the maximum poundage you can complete without necessarily having to do a single rep max lift. Simply enter the number of reps you can complete with the weight used into the estimator. Once this information is entered, select the formula and hit the calculate button.
Please keep in mind that these are only estimations and may not always be accurate. For example, because squatting utilizes more muscle groups than curling, research has discovered that some athletes can complete more reps of their predicted maximum capacity during a squat.
Additionally, your one rep max might change on a frequent basis, depending on factors like sleep quality and how well you have recuperated from prior sessions. Thus, don't ever be hesitant to reduce weight for a given exercise.
Some common formulas for calculating Maximum Load (1RM)
1RM = Weight ÷ (1.0278 - (0.0278 x number of repetitions))
1RM = Weight x (1 + (number of repetitions / 30))
1RM = Weight x (1 - (0.02 x number of repetition))
1RM = (100 x Weight) ÷ (101.3 - 2.67123 x number of repetitions)
1RM = Weight x (1 + 0.025 x number of repetitions)
1RM = (100 x Weight) ÷ (52.2 + (41.9 x e-0.055 x number of repetitions))
1RM = (100 x Weight) ÷ (48.8 + (53.8 x e-0.075 x number of repetitions))
One Repetition Maximum Calculator
Here is how to run the bench press test. It requires a spotter, bench, barbell, and weights.
Check this out One Rep Max Chart
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