MyGymCalcThe Idea
MyGymCalc exists because most fitness calculators are slow, cluttered with ads that block the page, and quietly send your body weight to a server you have never heard of.
This site does the opposite. Every calculator runs in your browser, using a few kilobytes of JavaScript. Your age, weight, and measurements are never transmitted, never stored, and never shared — close the tab and they are gone.
What We Do
We provide free, accurate calculators for the numbers that matter most in strength training and bodybuilding: calories, macros, one-rep max, protein intake, and body fat. Every calculator uses well-established, published formulas, like Mifflin-St Jeor for calorie needs, so you can trust the numbers you get.
Why It Matters
Two people eating the same calories can get very different results depending on their macros, training, and recovery. We built MyGymCalc to make the numbers behind those decisions fast and easy to check, without turning your workout into a research project.
Our Approach
- Free, always. No paywalls on our core calculators.
- No sign-up. Get your results instantly.
- Privacy-first. Your numbers never leave your device.
- Formula-based. We use recognized, published methods, not guesswork.
Get in Touch
Have a suggestion for a new calculator, or spotted something that doesn’t look right? We’d love to hear from you at contact@mygymcalc.com.