Loved by 100,000+ users
Rated 4.8 on the App Store and 4.7 on Google Play. Get the Calzeno app to track calories and scan food.
Calculate your BMI, calories, macros, body fat and more — built on trusted clinical formulas. Free, accurate, and private.
Seven free tools to understand and reach your goals
Body Mass Index & healthy weight range
Calories your body burns at rest
Total daily energy expenditure
Daily calories for loss, maintenance, gain
Body fat % (U.S. Navy method)
Ideal body weight across 4 formulas
Daily protein, carbs & fat targets
Every tool runs in your browser — no sign-up, no paywall.
Mifflin–St Jeor, WHO, and U.S. Navy methods.
Switch units freely; results adapt instantly.
Lose, maintain, or gain — with clear numbers.
Calzeno is a free suite of fitness and health calculators that turn your basic body stats into clear, actionable numbers. Whether you want to lose fat, build muscle, or simply understand your body better, you get reliable estimates in seconds — no account required.
Not sure where to start? Here's how the calculators fit together:
Every result is an estimate based on widely used clinical formulas and is meant to support — not replace — guidance from a qualified healthcare professional.
Yes. Every calculator on Calzeno — BMI, BMR, TDEE, calorie, macro, body fat, and ideal weight — is 100% free, requires no sign-up, and runs instantly in your browser on desktop and mobile.
Start with the TDEE calculator to find your maintenance calories, then use the calorie calculator to set a deficit (typically 15–20% below TDEE). Use the macro calculator to split those calories into protein, carbs, and fat, and the BMI or body fat calculator to track progress.
Results use clinically established formulas: the Mifflin–St Jeor equation for BMR and TDEE, WHO BMI categories, the U.S. Navy method for body fat, and Robinson/Miller/Devine/Hamwi formulas for ideal weight. They are reliable estimates for healthy adults and should complement, not replace, advice from a healthcare professional.
No account or download is needed to use the web calculators. If you want to track food and calories over time with barcode and photo scanning, you can optionally download the free Calzeno app for iOS and Android.
Yes. You can switch between metric (kg, cm) and imperial (lbs, inches) units on the relevant calculators, and results are shown in your chosen unit system.
Rated 4.8 on the App Store and 4.7 on Google Play. Get the Calzeno app to track calories and scan food.