Last Updated: December 24, 2025
⚠️ IMPORTANT NOTICE: Please read this disclaimer carefully before using the One Rep Max Calculator. By accessing and using this tool, you acknowledge that you have read, understood, and agreed to be bound by the terms of this disclaimer.

1. General Information

The One Rep Max Calculator ("the Tool") provided on this website is designed for informational and educational purposes only. The calculations and estimates generated by this tool are based on mathematical formulas (primarily the Brzycki Formula) and should be used as a general guide to help you understand your potential strength levels.

2. Not Medical or Professional Advice

The information provided by the One Rep Max Calculator does not constitute medical, fitness, or professional training advice. We are not certified personal trainers, physicians, physiotherapists, or healthcare professionals. The Tool and any content on this website should not be used as a substitute for:

Always consult with a qualified healthcare provider or certified fitness professional before:
  • Starting any new exercise program
  • Attempting to lift your calculated one rep max
  • Making significant changes to your training routine
  • If you have any pre-existing medical conditions or injuries

3. Accuracy and Limitations

While the One Rep Max Calculator uses scientifically-backed formulas, it is important to understand its limitations:

3.1 Estimation Only

The results provided are estimates and may not accurately reflect your true one rep max. Actual performance can vary based on numerous factors including:

3.2 Formula Limitations

The Brzycki Formula and other 1RM formulas work best with rep ranges between 1-10 repetitions. Results become increasingly less accurate with higher rep ranges (10+ reps) as these test muscular endurance rather than pure strength.

4. Risk Acknowledgment

Weight training and strength exercises carry inherent risks, including but not limited to:

⚠️ NEVER attempt a true one rep max without:
  • Proper warm-up and preparation
  • Experienced spotters present
  • Appropriate safety equipment (power rack, safety bars, etc.)
  • Excellent technique and form
  • Gradual progression over time

5. No Liability

To the fullest extent permitted by law, we disclaim all liability for any injuries, damages, losses, or adverse effects that may result from:

You assume full responsibility for your training decisions, exercise technique, safety precautions, and any consequences that may arise from using this tool or information on this website.

6. Individual Responsibility

By using the One Rep Max Calculator, you acknowledge and agree that:

7. Pre-Existing Conditions

If you have any of the following conditions, you must consult with a healthcare professional before using this tool or engaging in heavy strength training:

8. Progressive Training Approach

We strongly recommend a progressive and conservative approach to strength training:

9. Third-Party Links and Content

This website may contain links to third-party websites or resources. We do not endorse and are not responsible for the content, accuracy, or practices of these external sites. Use them at your own risk.

10. Modifications to Disclaimer

We reserve the right to modify, update, or change this disclaimer at any time without prior notice. Changes will be effective immediately upon posting on this page. Your continued use of the Tool after any changes constitutes acceptance of the updated disclaimer.

11. Geographic Considerations

This disclaimer is written in accordance with general legal principles. If you are accessing this website from outside your country, you acknowledge that your use is subject to your local laws and regulations. We make no representations that the Tool or content is appropriate or available for use in all locations.

12. No Warranty

The One Rep Max Calculator is provided on an "as is" and "as available" basis without any warranties of any kind, either express or implied, including but not limited to:

13. User Agreement

By using the One Rep Max Calculator, you explicitly agree that:

Your Safety is Paramount

Remember: The numbers generated by this calculator are just estimates. Your safety, proper form, and gradual progression are far more important than hitting any specific number. Train smart, train safe, and prioritize long-term health over short-term goals.

14. Contact Information

If you have any questions or concerns regarding this disclaimer, please contact us through our Contact Us page.


This disclaimer is effective as of the date stated above. By using the One Rep Max Calculator, you acknowledge that you have read, understood, and agreed to all terms contained in this disclaimer.