Calculate your bench press 1RM with the most accurate 1RM calculator, using a dynamically weighted average of the four best 1RM formulas for bench press. See the likely range for your 1RM and what each of the formulas predict.
The chart above shows the Predicted 1RM and each formula’s 1RM estimate. The shaded range is where your actual 1RM most likely falls. This calculator works best for 3-15 reps. This is an estimation and there are a number of variables that cannot be accounted for with these formulas.
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| % of 1RM | Weight | Predicted Reps |
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These are widely regarded as the four most accurate 1RM formulas for bench press. Our calculator uses a weighted average of all four that adjusts based on the rep count for consistent and accurate 1RM estimates. Brzycki is heavily relied upon for lower reps, shifting to Mayhew and Lombardi for higher reps. Learn more about 1RM formulas.
Try our full 1RM Calculator for other lifts or explore strength training guides.