# Lander's Formula

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MaxWeight =
Tags:
Rating
ID
cjlynch.Lander's Formula
UUID
1d31bee0-1d21-11e6-9770-bc764e2038f2

The Lander's Max Weight calculator computes the approximate maximum weight one can lift using the Lander's formula.

INSTRUCTIONS: Choose your preferred units and enter the following:

• (w) This is the weight lifted in repetitions.
• (r) This is the number of reps.

Max Weight:  The calculator returns the approximate max weight in pounds.  However, this can be automatically converted to other mass or weight units (e.g. kilograms) via the pull-down menu.

##### Math / Science

1RM = w/(1.013 - (0.0267123*r))

where:

• 1RM is the one rep maximum
• w is the weight lifted in multiple reps
• r is the number of reps

Max Repetition Weight formulas like Lander's are intended to provide an estimate on the maximum weight one can lift without having to attempt such a lift.  The motivation is to avoid injuries associated with lifting one's max.

This is a derivation of the One-Rep Max calculation

J Lander