About Calorie Fit
Last updated: October 2026
Calorie Fit is an independent project that builds free, privacy-friendly fitness calculators and publishes evidence-based articles on training, nutrition and recovery.
What we do
Our calculators — calorie (TDEE), BMI, macros, body fat and water intake — run entirely in your browser. The numbers you enter are never sent to our servers.
Our blog explains the science behind training and nutrition in plain language, with a clear answer first and the detail after.
How our content is made
We believe in being transparent about this: articles are drafted with the help of AI (Anthropic's Claude), then checked by automated verification — key statistics, study names and claims are looked up against primary sources before publication — and by automated quality checks on the finished page.
Article images are AI-generated illustrations (Google's Gemini). They are not photographs of real people, products or events. Read the details in our Editorial Policy.
What this site is not
Calorie Fit is not a medical service. Calculators give estimates and articles are general information. Please read our Medical Disclaimer and talk to a qualified professional before changing your diet or training, especially if you have a health condition.
Our principles
- Accuracy first — if we cannot verify a number, we don't publish it.
- No selling of personal data. Analytics only run if you accept cookies.
- Errors get corrected, and the article's "last updated" date changes when they do.