All Health & Fitness Calculators and Nutrition Tools
26 free tools. Calculators run in your browser with science-backed formulas, and the food database links to detailed nutrition facts.
⚖️ Body & Weight
BMI Calculator
Calculate your Body Mass Index
BMI for Children & Teens
BMI with CDC growth chart percentiles (ages 2-20)
BMR Calculator
Basal Metabolic Rate
TDEE Calculator
Total Daily Energy Expenditure
BMR / TDEE / Macro Calculator 2026
Combined BMR, maintenance calories, calorie goal, and macro gram targets
Ideal Weight
Find your ideal weight range
Body Fat Calculator
Estimate body fat percentage
Waist-to-Hip Ratio
Assess health risk from body fat distribution
Weight Loss Timeline
See when you'll reach your goal weight
🥗 Nutrition
Calorie Calculator
Daily calorie goals for weight management
Calorie Deficit Calculator
How many calories to eat to lose weight
Macro Calculator
Protein, carbs, and fat targets
Carb Cycling Calculator
High, moderate, and low-carb day targets for training cycles
GLP-1 Macro Calculator
Protein, hydration, and muscle protection on Ozempic and GLP-1s
Protein Calculator
Daily protein intake recommendations
Water Intake Calculator
Daily water intake goals
Recipe Nutrition Calculator
Calories and macros from recipe ingredients
Food Calorie Database
Nutrition facts and macros for 410+ foods
💪 Fitness & Wellness
One Rep Max (1RM)
Calculate your one-rep max for any lift
Calories Burned
Calories burned by exercise and activity
Pace Calculator
Running and walking pace calculator
Heart Rate Zones
Training heart rate zones
Sleep Calculator
Optimal bedtime and wake time by sleep cycles
Pregnancy Due Date Calculator
Estimate your due date and track pregnancy milestones
BAC Calculator
Estimate blood alcohol content using the Widmark formula
Fitness Age Calculator
Calculate your biological fitness age vs chronological age