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Weight & Nutrition Calculators

Weight and nutrition calculators help you plan what you eat. Estimate daily calories, plan a calorie deficit for a goal weight, split calories into macros, find a protein range, check your BMI and compare ideal weight formulas. All are general estimates, not medical advice, so check your own needs with a professional.

Last updated October 23, 2026

All Weight & Nutrition tools

Health & Fitness · Weight & Nutrition
Maintenance Calorie Calculator
Maintenance calories by Mifflin-St Jeor, Harris-Benedict or Katch-McArdle, with a range
Health & Fitness · Weight & Nutrition
Calorie Deficit Calculator
Daily calories to lose weight by a goal date, from maintenance calories and your target
Health & Fitness · Weight & Nutrition
Calorie Calculator
BMR, maintenance calories and weight-change targets by Mifflin-St Jeor
Health & Fitness · Weight & Nutrition
Macro Calculator
Daily protein, fat and carbohydrate grams from a calorie target
Health & Fitness · Weight & Nutrition
Protein Calculator
Daily protein range in grams from body weight and activity
Health & Fitness · Weight & Nutrition
BMI Calculator
Body mass index and standard adult category from height and weight
Health & Fitness · Weight & Nutrition
Ideal Weight Calculator
Devine, Robinson, Miller and Hamwi ideal weight formulas from height
Health & Fitness · Weight & Nutrition
Water Intake Calculator
General daily fluid estimate from weight, exercise and weather
Health & Fitness · Weight & Nutrition
BMR Calculator
Basal metabolic rate by Mifflin-St Jeor, with daily calories at each activity level
Health & Fitness · Weight & Nutrition
Body Fat Calculator
Body fat by the U.S. Navy method and BMI, with ACE categories and lean mass
Health & Fitness · Weight & Nutrition
TDEE Calculator
Activity-adjusted daily energy needs (BMR × activity) with calorie targets for a deficit or surplus

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