Nutrition Calculator
Estimate daily calorie needs (BMR and TDEE) and a target intake for your goal. Free.
Nutrition calculator
This nutrition calculator estimates your daily calorie needs: BMR (resting) and TDEE (total burn based on activity). Choose a goal (maintain, lose or gain weight) to get a suggested daily intake. For guidance only; not a substitute for professional or medical advice.
Frequently Asked Questions
What is a nutrition calculator?
A nutrition calculator helps you work out daily calorie needs and sometimes macro targets (protein, carbs, fat) from your age, sex, weight, height and activity. Use it to plan intake for maintaining, losing or gaining weight.
How many calories do I need per day?
Your daily need depends on BMR (resting burn) and activity. The calculator uses the Mifflin-St Jeor equation for BMR and an activity multiplier to give an estimated TDEE. You can then set a target for maintain, lose or gain.
Is the nutrition calculator free?
Yes. Free to use. For guidance only; not a substitute for professional advice.
What is BMR?
BMR (Basal Metabolic Rate) is the calories your body burns at rest to maintain life. It is estimated from age, sex, weight and height. TDEE is BMR × activity level.
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Cite This Calculator
Reference this calculator on your website or in your work using the citation below:
HTML Citation Code:
<p>Calculator: <a href="https://onlinecalculator.co.uk/health/nutrition-calculator" target="_blank">Nutrition Calculator</a> - OnlineCalculator.co.uk</p>APA Style Citation:
OnlineCalculator.co.uk. (2025). Nutrition Calculator. Retrieved from https://onlinecalculator.co.uk/health/nutrition-calculatorNote: This calculator is free to use and reference. No permission required for educational or commercial citation.