About LeanGauge

LeanGauge offers free fitness and nutrition calculators (calories, macros, protein, BMR, BMI and more) — fast, free, and with no signup required.

We built LeanGauge because getting a straight answer to a simple question shouldn't require wading through ads, popups, or long articles. Every tool on the Site gives you a clear result in seconds, using established, widely accepted formulas.

Our approach

All of our calculators run directly in your browser, so your inputs stay on your device. We keep the interface clean and the math transparent, and we explain what each result means so you can use it with confidence.

A note on accuracy

LeanGauge provides general educational estimates and is not medical or nutritional advice. Consult a qualified professional before making significant changes to your diet or training.

Get in touch

Feedback or a calculator you'd like to see? Reach us on our contact page.