Free nutrition calculators

Quick, free tools for the numbers behind eating well — no account, no email. Each one runs entirely in your browser and updates as you type, in metric or imperial. Use them to set a starting point, then let NibbleCal handle the day-to-day logging from a photo of your plate.

• TDEE calculator Estimate your total daily energy expenditure — the calories you burn in a day.
• Calorie deficit calculator Set a weight-loss target and see a realistic weekly estimate.
• Macro calculator Split your calories into protein, carbs, and fat in grams.
• BMI calculator Find your body mass index and WHO category, explained neutrally.