Converters

Convert between inches, centimeters, meters, feet, yards, kilometers, and miles instantly with a simple browser-based length converter.

Convert between kilograms, grams, milligrams, pounds, ounces, and tonnes instantly with a fast browser-based weight converter.

Convert numbers between binary, octal, decimal, and hexadecimal online with instant cross-updates for debugging, low-level work, and programming tasks.

Convert HEX, RGB, and HSL colors online, fine-tune values with a live picker, and copy formats ready for CSS, design systems, or UI work.

Convert temperatures between Celsius, Fahrenheit, Kelvin, and Rankine with instant two-way updates.

Convert between bytes, kilobytes, megabytes, gigabytes, and more in both decimal (KB) and binary (KiB) units.

Convert between square meters, square feet, acres, hectares, and more area units instantly.

Convert liters, gallons, milliliters, cubic meters and other volume units with live two-way sync.

Convert speed between mph, km/h, m/s, knots, and more with live calculation.

Convert durations between milliseconds, seconds, minutes, hours, days, and weeks.

Convert angles between degrees, radians, gradians, and turns with real-time updates.

Convert numbers to Roman numerals and back (1–3999). Fast, private, client-side.

Convert numbers into written English words. Handles big numbers, negatives, and decimals.