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# Lander's Formula

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Equation / Last modified by KurtHeckman on 2018/08/29 23:25
`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

The Lander's One Rep Max formula is:

`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*

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This equation,

**Lander's Formula**, is used in 1 calculator.**Calculators**