Nutrition Tools
Nutrition calculators
Twelve free calculators based on published formulas. Your inputs stay in your browser and are never saved.
Meal planning · Flagship tool
Dietenza Diet Planner
A personalised 1–7 day meal plan with foods from your country, gram and household portions, nutrient-matched swaps, a shopping list and PDF download.
Create My Free Plan →Calculators
BMI Calculator
Check your body mass index against WHO adult ranges.
Open calculator →Daily Calorie Needs
Estimate daily calories to maintain, lose or gain weight.
Open calculator →BMR Calculator
Calories your body uses at complete rest.
Open calculator →TDEE Calculator
Total daily energy expenditure including activity.
Open calculator →Healthy Weight Range
Healthy weight range for your height.
Open calculator →Body Fat Estimate
Estimate body fat from tape measurements.
Open calculator →Macronutrient Calculator
Split daily calories into carbs, protein and fat.
Open calculator →Daily Protein
How much protein you need per day.
Open calculator →Daily Water Intake
Recommended total daily water intake.
Open calculator →Weight Gain / Loss Planner
Plan a safe timeline and daily calories to reach your goal.
Open calculator →Pregnancy Calories & Weight Gain
Guideline weight gain and extra calories by trimester.
Open calculator →Child BMI-for-Age
BMI percentile for children and teens aged 2–20.
Open calculator →