Unit Converters
Convert between length, weight, temperature, speed, and more.
6 tools
Sorted by popularityLength Converter
Convert between meters, feet, inches, cm, km, miles, and more.
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Temperature Converter
Convert Celsius, Fahrenheit, and Kelvin in real time.
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Weight Converter
Convert between kilograms, pounds, ounces, grams, stones, and more.
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Speed Converter
Convert between km/h, mph, m/s, knots, and Mach number instantly.
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Data Storage Converter
Convert between bits, bytes, KB, MB, GB, TB, and PB instantly.
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Time Converter
Convert between seconds, minutes, hours, days, weeks, months, and years.
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Frequently asked questions
Are these unit converters 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.