All Tools VerseOne Rep Max Calculator
Estimate your one rep max from weight and reps with Epley and Brzycki, plus a full percentage training table. Runs in your browser.
- Runs in your browser
- Nothing uploaded
- Free, no sign-up
Estimate the most you can lift for a single rep from a set you already did, using the Epley and Brzycki formulas, plus a percentage table for programming your training. Runs in your browser.
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| % of 1RM | Weight | Reps |
|---|
Estimates work best for sets of about 1 to 10 reps and get less accurate at high rep counts. Warm up, use a spotter and lift within your limits when testing near your max.
How to Use One Rep Max Calculator
- Enter your set. Type the weight you lifted and how many clean reps you completed.
- Pick your unit. Choose kilograms or pounds to match your plates.
- Read your one rep max. See the Epley and Brzycki estimates and their average, plus a percentage table for training.
- Program your lifts. Use the percentage rows to set working weights for different rep ranges.
Frequently Asked Questions
How is one rep max estimated?
It uses two well known formulas. Epley is weight times one plus reps over thirty. Brzycki is weight times thirty six over thirty seven minus reps. The tool averages them.
How accurate is it?
Estimates are most reliable for sets of about one to ten reps. Beyond that the numbers drift, so use higher rep sets only as a rough guide.
What is the percentage table for?
Training programs prescribe loads as a percentage of your max. The table converts your estimated max into working weights and typical rep targets.
Should I actually test a true max?
You can, but it carries more injury risk. Estimating from a submaximal set is safer and good enough for programming for most lifters.
Does it work for any lift?
Yes, for standard barbell lifts like squat, bench and deadlift. Very technical or unstable movements are less predictable.
Is my data private?
Yes. The calculation runs in your browser and nothing is uploaded.
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