One Rep Max Calculator
Calculate estimated one rep max using Epley formula from weight and reps.
The One Rep Max Calculator below works out your result the moment you type — no sign-up, no cost. A quick, private way to check the numbers that matter to your health. Enter weight (kg) and reps completed and the total updates live.
How the one rep max calculator works
Just fill in the fields above — weight (kg) and reps completed — and the one rep max calculator does the maths instantly. Nothing is sent anywhere; the calculation happens right in your browser.
Want this one rep max calculator on your own site?
Add it free with RGT Quote Builder — a drag-and-drop WordPress calculator plugin with 100+ ready-made templates and no paywall.
FAQ
Is the one rep max calculator free?
Yes — completely free to use, with no account and no limits.
Can I add this one rep max calculator to my WordPress site?
Yes. Install the free RGT Quote Builder plugin, pick the One Rep Max Calculator template, and drop it onto any page with a shortcode or block.
Can I customise the fields and pricing?
Absolutely — every field, price and formula is editable in the drag-and-drop builder.