One Rep Max Calculator
Calculate 1RM for weightlifting exercises
1-Rep Max Calculator
Estimate your one-repetition maximum using the Epley and Brzycki formulas.
How It Works
- • Epley: 1RM = weight × (1 + reps / 30)
- • Brzycki: 1RM = weight × 36 / (37 − reps)
- • For best accuracy, use a weight you can lift for 1–10 reps with good form.
- • The percentage table helps you pick weights for strength (85–95%) or hypertrophy (65–80%) training.
Privacy & Security
All calculations run locally in your browser. Nothing is stored or sent anywhere.
Check out our Surfboard Volume Calculator tool for related functionality. That's what our free One Rep Max Calculator does — open it and start.
Key Features
Instant one rep max calculator calculations with real-time results
Personalized results
Goal tracking support
Works on desktop, tablet, and mobile devices
No account or registration needed — completely free
Privacy-focused design
One Rep Max Calculator
Open the Tool
Navigate to the One Rep Max Calculator page on our website. The tool loads instantly in your browser.
Enter Your Data
Input the required values or parameters into the form fields. All fields are clearly labeled for easy understanding.
Get Results
Click the calculate or submit button to see your results. Results are displayed immediately with clear formatting.
Use or Export
Copy your results, take a screenshot, or use them directly in your project. All results can be easily shared or saved.
Use Cases
Ideal for fitness enthusiasts tracking progress
Perfect for athletes optimizing training
Great for health-conscious individuals planning nutrition
Useful for personal trainers creating client programs
Frequently Asked Questions
What is One Rep Max Calculator?
Yes, 100% free. Use it as many times as you want.
Is this tool free to use?
Yes, One Rep Max Calculator is completely free. No registration, no account, and no downloads are required. Just open the tool and start using it right away.
Can I use this on my phone?
Yes, One Rep Max Calculator is fully responsive and works on all devices including smartphones, tablets, and desktop computers. The interface adapts to your screen size automatically.
Is this medical advice?
No, this tool provides general fitness and health calculations for informational purposes. Always consult a healthcare professional for medical advice or before starting new exercise or nutrition programs.
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