STRENGTH
1RM Calculator
Calculate your estimated one-rep max from any working set. Enter the weight you lifted and the reps completed — we'll do the math using the Epley formula.
Your Details
Your Results
Estimated 1RM
0
kg
Breakdown
Percentage
Weight
How It Works
Epley Formula
The Epley formula uses your rep and weight data to back-calculate your theoretical maximum. It’s the gold standard used by coaches and athletes worldwide for programming strength training.
Formula
1RM: Weight × (1 + Reps / 30)
FAQ's
Frequently Asked Questions (FAQ’s)
You can specify your email address when purchasing the PRO subscription. However, if you have used the quick checkout via Google Pay, Apple Pay or Paypal or any other quick checkout service, the email address you have stored with your payment service provider might usually be used for the registration. Please remind yourself which payment service provider you used to register your PRO account with us.
You can specify your email address when purchasing the PRO subscription. However, if you have used the quick checkout via Google Pay, Apple Pay or Paypal or any other quick checkout service, the email address you have stored with your payment service provider might usually be used for the registration. Please remind yourself which payment service provider you used to register your PRO account with us.
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