One Rep Max Calculator
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Estimated 1RM:
1RM
| Percentage | Weight |
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Does this work with pounds (lbs) and kilograms (kg)?
Yes. The formula that is used to calculate the theoretical maximum of your one repetition lift works with pounds and kilograms.
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How is the one repetition maximum (1RM) calculated?
the one rep max (1rm) is estimated using the epley formula:
1rm = weight x (1 + reps / 30)
this formula provides a close approximation of your maximum strength for a single repetition. Read more in wikipedia here.