Home β€Ί πŸ‹οΈ Health & Fitness β€Ί One Rep Max (1RM) Calculator
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One Rep Max (1RM) Calculator

Calculate your estimated 1 rep max for any lift using multiple formulas. Get instant results based on proven formulas.

Result
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About the One Rep Max (1RM) Calculator

Calculate your estimated 1 rep max for any lift using multiple formulas. Get instant results based on proven formulas.

Calculate your estimated 1 rep max for any lift using multiple formulas. This calculator is completely free β€” no sign-up, no email, no paywalls. Results are estimates; always verify with a qualified professional for high-stakes decisions.

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Frequently Asked Questions

How accurate is this calculator?
Based on validated formulas. Individual variation means results are estimates β€” use as a guide.
Should I consult a doctor?
Yes β€” always consult a healthcare professional before starting a new diet or exercise programme.
How often should I recalculate?
Recalculate every 4–8 weeks or when your weight, activity level, or goals change.
Are metric or imperial units used?
Metric (kg, cm). To convert: 1 lb = 0.453592 kg; 1 inch = 2.54 cm.

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πŸ“‹ How to Use

  1. Enter your values in the fields above
  2. Click Calculate or press Enter
  3. View your instant results and chart
  4. Export to CSV or share your results

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