Free Online Calorie Calculator
The numbers are estimates built on population averages, useful as a starting point rather than a prescription.
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How to use Calorie Calculator
- Enter age, sex, height and weight.
- Choose your activity level.
- Read BMR and maintenance calories.
- Compare the gentle deficit and surplus targets.
Questions about Calorie Calculator
How accurate is it?
Typically within ten to twenty percent for a healthy adult; measured energy expenditure is the only exact answer.
Should I eat at the deficit figure?
Treat it as a reference and check any significant change with a qualified professional.
About Calorie Calculator
Estimate daily calorie and macro needs with our free online Calorie Calculator. 100% browser-based, fast, and private—no login or file uploads required.
These calculators and converters turn everyday numbers into answers instantly: percentages, BMI, loans and interest, units, colours and dates, with the formula shown so you can check the working.
This tool runs in your browser. The file is not uploaded. Results update as you type and are rounded for display; for money or legal figures keep the unrounded value and double-check against your own spreadsheet before relying on it.