One Rep Max Calculator
Estimate your one-rep max (1RM) from the weight you lift and the number of reps performed.
About This Calculator
The One Rep Max Calculator estimates the maximum weight you can lift for a single repetition based on the weight and reps you've performed. It uses proven formulas to help you plan progressive overload training.
How to Use
- Enter the Weight you lifted
- Enter the number of Reps completed
- Click Calculate to see your estimated 1RM
- View percentage-based training weights for different rep ranges
Practical Use Cases
- Strength Training: Plan weights for different rep ranges
- Progress Tracking: Monitor strength gains over time
- Program Design: Set appropriate training intensities
- Competition Prep: Estimate competition lift attempts
- Safe Training: Avoid attempting true 1RM frequently
? Frequently Asked Questions
How accurate is this
This calculator uses standard formulas and provides accurate results for typical use cases. For professional or critical applications, always verify results with certified professionals or official sources.
Is this calculator free to use?
Yes, this One Rep Max Calculator • Fitness • Calculator is completely free to use with no registration required. You can use it as many times as needed without any limitations.
Can I use this on mobile devices?
Absolutely! This calculator is fully responsive and works perfectly on smartphones, tablets, and desktop computers.
How do I interpret the results?
The results are displayed clearly with appropriate units. Refer to the "About This Calculator" section for detailed information.