Tools
Free tools for your next workout.
Six quick calculators for the numbers lifters reach for most. There is nothing to install and nothing to sign up for.
One-Rep Max Calculator
Enter a hard set and see your estimated one-rep max, with the load to use at every percentage.
Estimated one-rep max: 260 lb.
Estimated one-rep max
260 lb
Epley
262.5
Brzycki
253.1
Lombardi
264.3
| Percentage | Load | Typical reps |
|---|---|---|
| 95% | 247 lb | 2 |
| 90% | 234 lb | 4 |
| 85% | 221 lb | 6 |
| 80% | 208 lb | 8 |
| 75% | 195 lb | 10 |
| 70% | 182 lb | 11 |
| 65% | 169 lb | 15 |
| 60% | 156 lb | More than 15 |
| 50% | 130 lb | More than 15 |
How the estimate works. Each formula turns a set of several reps into the single rep it suggests you could lift. Epley is the most widely used, Brzycki tends to be closer at low reps, and Lombardi is gentler at high reps. The headline number is the average of the three. Estimates are most reliable from sets of 2 to 10 reps taken close to failure, so the calculator stops at 12 reps.
In Liftr. Liftr charts your estimated one-rep max for every exercise as you log, so you can watch it move without doing the sum yourself.
Let Liftr do the maths while you lift.
Track your workouts with just a tap, and see your strength, volume and records update on their own.
