The 1 Rep Max Calculator Bench Background. Calculate your 1 rep max (1rm) bench press using this accurate tool! Your one rep max is the maximum weight you should lift for a single rep of a given exercise.
Calculate your one rep max and then check out the leaderboard to see how you stack up against the strongest gravitus users for our most popular exercises.
Your one rep max (1rm) for bench press is calculated using the following formula for example, if you can bench press 180 lbs for 5 reps, then your one rep max is 180 * (1 + (5/30)) = 210. We also explain our max rep formula for calculations on the go. Calculate your approximate bench press one rep max, along with percentages of your bench press max, using any weight and rep combination. To find the your one rep max, simply fill in the values below and then click the calculate button.
