Lombardi Formula 1RM Calculator

The Lombardi formula uses a power model — simple and fast to compute, suitable as a quick estimate.

w × r^0.1The Lombardi formula uses a power model — simple and fast to compute, suitable as a quick estimate.

5 reps
One Rep Max
5 reps @ 225lb
264
lb
Lombardi formula
Estimated One Rep Max
5@225lb
264lb
Using the Lombardi formula
Useful calculator?

Big Four Strength Levels

Strength levels for a 200lb male, age 30 lifting 264lb in each lift type · enter your details.

Rep Max Projections

Lombardi algorithm

RepsWeight (lb)
1RM264lb
2RM246lb
3RM237lb
4RM230lb
5RM(current)225lb
6RM221lb
7RM217lb
8RM214lb
9RM212lb
10RM210lb
20RM196lb

Percentage Calculator

Based on 264lb estimated max

IntensityWeight (lb)
100%264lb
95%251lb
90%238lb
85%224lb
80%211lb
75%198lb
70%185lb
65%172lb
60%158lb
55%145lb
50%132lb