Health & Fitness
BMI, calorie, body fat, and workout calculators.
5 tools
Sorted by popularityBMI Calculator
Calculate your Body Mass Index in metric or imperial units.
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Calorie Calculator
Calculate your daily calorie needs based on age, weight, and activity.
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Ideal Weight Calculator
Calculate your ideal weight range using multiple medical formulas.
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Water Intake Calculator
Calculate your daily water intake recommendation based on weight and activity.
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Body Fat Calculator
Estimate body fat percentage using the US Navy method (neck, waist, height).
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Frequently asked questions
Are these health & fitness really free?
Yes — all tools on UtilDen are 100% free, no credit card, no signup.
Does my data stay private?
Every tool runs inside your browser. Nothing is sent to our servers.
Can I use these tools on mobile?
Absolutely. UtilDen is fully responsive and works great on phones and tablets.
How often are new tools added?
We ship new tools regularly. Bookmark the site or check back often.