Browse every free LoseSize calculator. Each tool runs in your browser, cites its sources, and is reviewed against CDC, NIH, and WHO guidance.
- BMI CalculatorCheck your Body Mass Index and healthy weight range with the formulas the CDC uses. Open tool
- BMR CalculatorFind your Basal Metabolic Rate (calories burned at rest) using the Mifflin-St Jeor equation. Open tool
- TDEE CalculatorEstimate your daily maintenance calories from your stats and activity level. Open tool
- Macro CalculatorDaily calorie and protein/carb/fat targets based on your goal and activity level. Open tool
- Calorie Deficit & Goal-Date CalculatorProject when you will reach your goal weight based on your daily calorie deficit. Open tool
- Body Fat Calculator (U.S. Navy Method)Estimate body fat % from tape measurements with the U.S. Navy circumference method. Open tool
- Ideal Weight CalculatorCompare Devine, Robinson, Miller, and Hamwi ideal weight formulas plus your healthy BMI range. Open tool
- Waist-to-Hip Ratio CalculatorWaist-to-hip ratio with WHO risk categories and the NIH waist-risk threshold. Open tool
- Clothing Size ConverterConvert US / UK / EU clothing sizes for women’s dresses and men’s suits. Open tool
- Body Measurement TrackerLog measurements over time and track total inches changed — private, saved on your device. Open tool