Leg Press 1RM Calculator
Calculate your leg press one rep max with exercise-specific tips and guidance.
Calculate Your 1RM
Enter your weight and reps above to calculate your estimated 1RM
For best accuracy, use a weight you can lift for 3-10 reps
About 1RM Formulas
Epley Formula: Most accurate for lower rep ranges (1-6 reps). Commonly used in strength training.
Brzycki Formula: More conservative estimates. Better for higher rep ranges (6-12 reps).
Lander Formula: Middle ground between Epley and Brzycki. Good all-around accuracy.
Note: These are estimates. Your actual 1RM may vary based on factors like fatigue, technique, and training experience. Always use a spotter when testing maxes.
Form Tips
- ✓Place feet shoulder-width on the platform
- ✓Track knees over toes, avoid caving inward
- ✓Use full range of motion — at least 90 degrees of knee flexion
- ✓Don't fully lock out knees at the top to protect joints
Common Mistakes
- ✗Lower back rounding off the seat (butt wink at the bottom)
- ✗Partial reps to load more weight than you can control
- ✗Locking out knees aggressively (joint damage)
- ✗Feet too low on the platform (knee strain)
Form Cues
Formula Accuracy
Lower accuracy for 1RM prediction — leg press allows grinding reps at high loads, so estimates from 8+ reps can overshoot by 10-15%. Use 3-6 rep range for best results.
Average Strength Levels
Male
Female
Frequently Asked Questions
How do I calculate my Leg Press 1RM?
To calculate your Leg Press 1RM: enter the weight you lifted and the number of reps completed. The calculator will apply the Epley, Brzycki, and Lander formulas to estimate your one rep max.
How accurate is the 1RM calculator for Leg Press?
Lower accuracy for 1RM prediction — leg press allows grinding reps at high loads, so estimates from 8+ reps can overshoot by 10-15%. Use 3-6 rep range for best results.
What muscles does Leg Press work?
Leg Press primarily targets: Quads, Glutes, Hamstrings.
What is a good Leg Press 1RM?
For men: beginner 150kg, intermediate 250kg, advanced 350kg. For women: beginner 80kg, intermediate 140kg, advanced 220kg.
Other Exercise Calculators
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