1RM Calculator | Input Data for Instant Online Calculations

Enter the weight you lifted, e.g.: 60kg Enter the number of repetitions, e.g.: 5 reps

How to use:

  • Enter the weight you lifted in the "Weight Lifted" input box.
  • Enter the number of repetitions you performed in the "Reps Performed" input box.
  • Click "Calculate" to get an estimate of your One-Rep Max (1RM) and its percentages.

Effortlessly calculate your 1RM! Just input data, perfect for various exercises. Tailor your training, maximize your strength.

1RM Calculator
1RM Calculator

What exactly is 1RM?

1RM, or "One Rep Maximum," refers to the maximum amount of weight an individual can lift for one repetition without assistance.

What are the pros and cons of testing 1RM?

Pros: Provides a clear benchmark of one's maximum strength, helps in setting training goals. Cons: Risk of injury if done improperly, not recommended for beginners or those without proper warm-up.

How can one safely perform a 1RM test?

Always ensure a trained instructor or qualified spotter is present, use proper lifting techniques, and ensure adequate warm-up.

Is there a correlation between one's age and 1RM?

Generally, strength peaks in the late 20s to early 30s and gradually declines with age. However, consistent training can offset this decline.

How often should I test my 1RM?

It's ideal to test every 3-6 months, allowing enough time for strength development between tests.

What factors affect the accuracy of a 1RM test?

Factors include the lifter's fatigue level, time of day, nutrition, hydration status, and even psychological factors.

What's the typical cost involved in professional 1RM testing?

Professional testing, involving specialized equipment and expert supervision, can range from $50 to $200, depending on the facility and region.

Are there alternatives to direct 1RM testing?

Yes, submaximal lifts using lighter weights and multiple reps can be used to estimate 1RM using specific formulas, reducing the risk of injury.
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