Rep Max Converter
Enter your one rep max and select a target rep range to see the equivalent weight.
What Does the Rep Max Converter Calculate?
The rep max converter turns your one rep max into estimated weights for any rep range you plan to train in. Instead of guessing what to load on the bar for a set of 5 or a set of 10, this tool uses your known one rep max and a strength training formula to calculate the approximate weight you can handle for that specific rep target. It works for the bench press, squat, deadlift, and other compound lifts, giving you a practical loading guide for programming without needing to test every rep range in the gym.
Who Should Use This Tool
This tool is built for lifters who already know or have estimated their one rep max and want to plan training weights around it. Bodybuilders use it to find hypertrophy loading zones, typically 8 to 12 reps, while powerlifters use it to plan heavy triples and doubles during a strength cycle. Coaches programming for multiple athletes find it useful for quickly setting rep max targets. Beginners benefit too, since it removes guesswork when structuring progressive overload across a training block.
How To Use This Tool
Enter your current one rep max for the lift you are training, whether that is the bench press, squat, or deadlift, then select the rep range you want to convert to. The calculator applies the Epley formula in reverse, working backward from your max to estimate the load for lower or higher rep sets. Results are shown as an estimated weight and percentage of your one rep max, so you can round to the nearest plate and adjust based on how the set actually feels.
Understanding Your Results
The weight shown represents an estimated training load for your selected rep range, based on standard strength training percentages tied to your one rep max. Lower rep ranges like 1 to 3 sit closer to 90 to 100 percent of your max, while higher rep ranges like 10 to 15 sit closer to 65 to 75 percent. These figures are estimates rather than fixed rules, since fatigue, recovery, and individual strength curves vary. Use the result as a starting point and adjust slightly heavier or lighter based on bar speed and effort.
Frequently Asked Questions
A. It gives a close estimate based on the Epley formula, though individual results can vary by a few percent depending on your strength curve.
A. It uses the Epley formula, applied in reverse to convert a one rep max into weights for different rep ranges.
A. Yes, it works best for major compound lifts like the bench press, squat, and deadlift.
A. Most lifters find 8 to 12 reps effective for hypertrophy, though a wider range can still build muscle.
A. Use it as a starting point, then adjust based on bar speed, fatigue, and how the set feels on that specific day.
A. Update it every 4 to 8 weeks or whenever your strength training numbers noticeably change.
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Not sure of your starting number? Use the 1RM Calculator first. Once you’ve converted your target weight, the Plate Calculator and Barbell Weight Calculator can help you load the bar, and the Warm Up Weight Calculator can build your ramp-up sets.