Enter the total weight you lifted and the number of reps into the calculator to determine your estimated 3 rep max.

## 3RM Formula

The following formula is used to calculate a 3 repetition maximum weight.

3RM = 1RM*.93

- Where 3RM is your 3 rep max
- 1RM is your 1 rep max

To calculate your three rep max (3RM), multiply your 1 rep max by .93.

## 3RM Definitoin

**What is 3RM? **

3RM is a term used in the fitness world to describe the maximum amount a person can lift 3 times. In other words, the person’s three rep max.

**How much is my 3 rep max? **

A 3 rep max is estimated to be around 93% of the weight of your one-rep max. This will vary slightly depending on the exercise, but in general, the average is 93% of 1 rep max.

## Example Problem

How to calculate 3rm?

**First, perform an exercise to failure and note the weight and reps.**For this example, a person is lifting a bench press of 225lbs and manages 8 reps until they hit failure.

**Next, determine the estimated max lift.**Using the calculator linked above, the max lift of this bench press is estimated to be 272.25 lbs.

**Finally, calculate the 3-rep max.**Using the formula above, the 3 rep max is calculated to be:

3RM = 1RM*.93

3RM = 272.25 *.93

3RM = 253 .19 lbs.