One Rep Max Calculator (1RM)
The One Rep Max (1RM) Calculator helps you estimate the maximum weight you can lift for a single repetition. This tool is widely used in strength training to plan workouts safely and effectively.
Calculate Your 1RM
How This One Rep Max Calculator Works
This calculator uses a commonly accepted strength training formula (Epley Formula) to estimate your one rep max based on the weight lifted and number of repetitions performed.
Formula Used
1RM = Weight × (1 + Reps / 30)
Short Questions & Answers (User Queries)
Q: What is a one rep max?
A one rep max is the maximum amount of weight you can lift for one complete repetition with proper form.
Q: Is this one rep max calculator accurate?
It provides a close estimate and is suitable for workout planning, but it is not a replacement for professional assessment.
Q: Can beginners use a 1RM calculator?
Yes, beginners can use it safely, but testing very heavy lifts directly is not recommended.
Q: How often should I calculate my 1RM?
Most lifters reassess their 1RM every 6–8 weeks as strength levels change.
Q: Can I use this calculator for bodybuilding?
Yes, it is useful for bodybuilding, powerlifting, and general strength training programs.
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