Health & fitness
Back to all calculators
Health & fitness
One-rep max calculator
Estimate your one-rep max with the Epley formula.
Your result
Complete the fields and calculate.
Example
One-rep max calculator
80 kg × (1 + 8/30) gives about 101.3 kg.
FAQ
Frequently asked questions
How accurate is the result?+
The calculator uses the stated formula and only rounds the display. Accuracy depends on your inputs.
Is this calculator really free?+
Yes. Use it as often as you like without an account or registration.
Are my entries stored?+
The calculation runs directly in your browser. Calculator values are stored locally only when you explicitly add a result to “My results”. Favourites and history also remain locally on your device.