Universal Unit Converter
Welcome to UnitToolbox – your fast and easy online unit converter. Instantly convert any unit of length, weight, volume, temperature, area, and more. Whether you're working on homework, engineering, cooking, or planning a DIY project, our simple tool gives you accurate results in seconds.
Common Converters
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Length
Convert meters, centimeters, feet, inches, and more. -
Weight / Mass
Quickly convert kilograms, grams, pounds, ounces, and tons. -
Volume
Convert liters, milliliters, gallons, cups, and other volume units. -
Temperature
Switch between Celsius, Fahrenheit, Kelvin, and more. -
Area
Convert square meters, acres, hectares, and other area units. -
Time
Convert seconds, minutes, hours, days, weeks, months, and years. -
Pressure
Convert pascals, bars, PSI, atmospheres, and more. -
Energy
Switch between joules, calories, kilowatt-hours, and BTUs. -
Speed
Convert kilometers per hour, miles per hour, meters per second, etc. -
Angle
Convert degrees, radians, gradians, revolutions, and more.
Popular Conversions
Quick links to the most searched unit conversions like kg to lbs, cm to inches, Fahrenheit to Celsius, and more.
Why Users Love UnitToolbox?
- ⚡ Fast, accurate conversions
- 📱 Works on any device
- 🔒 No logins, no tracking
- 💡 Easy-to-understand results with explanations
FAQ – UnitToolbox Unit Converter
- What is UnitToolbox used for?
- UnitToolbox is a free online tool that helps you quickly convert units like meters to feet, Celsius to Fahrenheit, or kilograms to pounds. It’s ideal for students, engineers, DIYers, and everyday users.
- Is UnitToolbox free to use?
- Yes! UnitToolbox is 100% free, with no logins or subscriptions required. Just open the site and convert any unit instantly.
- Does UnitToolbox work on mobile phones?
- Absolutely. The site is fully mobile-optimized, so you can convert units on your phone, tablet, or desktop with ease.
