Converters
Convert units, data, and colors with free tools that process everything in your browser—no uploads or watermarks.
Every tool is free, watermark-free, and runs entirely in your browser—nothing uploads to our servers. If anything needs extra permissions, we call it out right away.
Temperature
Convert between Celsius, Fahrenheit, and Kelvin
Length/Distance
Convert between meters, feet, miles, kilometers, and more
Weight/Mass
Convert between kilograms, pounds, ounces, and more
Volume
Convert between liters, gallons, cups, and more
Area
Convert between square meters, acres, hectares, and more
Speed
Convert between mph, km/h, knots, and more
Time Units
Convert between seconds, minutes, hours, days, and more
Pressure
Convert between PSI, bar, pascal, and more
Energy
Convert between joules, calories, BTU, and more
Power
Convert between watts, horsepower, and more
Data Storage
Convert between bytes, kilobytes, megabytes, gigabytes, and more
Data Rate
Convert between Mbps, Kbps, MB/s, and more
Color Converter
Convert between HEX, RGB, HSL, and other color formats
Contrast Checker
Check color contrast for accessibility compliance