Free Health & Nutrition Calculators
Science-based tools to help you understand your body, plan your nutrition, and reach your goals. All calculators are free, private, and require no sign-up.
Meal Plan Generator New
Build a free 7-day meal plan from real food — simple repeatable meals, portions matched to your calories, and a grocery list you can memorize.
Weight Loss Calculator
Find out how long it will take to reach your goal weight. Get a realistic timeline with adaptive calorie modeling.
TDEE Calculator
Calculate your Total Daily Energy Expenditure — the total calories you burn per day based on BMR and activity level.
BMR Calculator
Find your Basal Metabolic Rate — the calories your body burns at complete rest just to keep you alive.
BMI Calculator
Calculate your Body Mass Index and find your healthy weight range based on your height and weight.
Ideal Body Weight
Find your ideal weight range using four published formulas (Devine, Robinson, Miller, and Hamwi) based on your height and gender.
Daily Calorie Intake
How many calories do you need per day? Get a personalized estimate based on your stats and activity level.
Macro Calculator
Calculate your daily protein, carbs, and fat targets. Try the CalorieJoy smart split method.
Body Fat Percentage
Estimate your body fat using the US Navy method. Get your fat mass, lean mass, and fitness category.
Water Intake
How much water should you drink daily? Get your target based on weight, activity, and climate.
Protein on GLP-1
On Ozempic or Wegovy? Find your daily protein target to lose fat without losing muscle.
Put these calculators on your website
Every calculator here is available as a free embeddable widget - no signup, automatic dark mode, one copy-paste. Get the free embed code