One-Rep Max Calculator
A one-rep max (1RM) is the maximum amount of weight you can lift for a single repetition of a given exercise through a full range of motion with proper technique. The easiest way to calculate your one-rep max is to review your training log, find the most weight you've lifted on an exercise for 3 to 6 reps, and plug in the weight and reps into the Kfitzone One-Rep Max Calculator.
One Rep Max Calculator
Calculate your one-rep max (1RM) for any exercise.
Enter a weight of which you can perform 4-6 repitions
Your one-rep max is:
Frequently Asked Questions
A one-rep max calculator is accurate when using a weight that you lifted for around 4 to 6 repetitions.
If a calculator uses an 6+ rep max to estimate your one-rep max, it will be significantly less accurate.
Tracking your one-rep max helps you get stronger, which is the most reliable way to build muscle. If your one-rep max is going up for a particular exercise, that means the muscles trained by that exercise are growing.
First, you can improve your one-rep max by training the exercises you want to improve. You improve your squat one-rep max by doing squats, your bench press by benching, and so forth.
Second, gradually increase how much weight you lift over time.
Research shows this is the most powerful stimulus for strength and muscle gain.
