Unit Converters

Convert between metric and imperial units instantly. Change centimeters to inches, kilograms to pounds, Celsius to Fahrenheit, liters to gallons and more, convert currencies with live exchange rates, or switch numbers between binary, hex and Roman numerals.

19 free tools · no account required · works on any device.

Area Converter Free area converter: convert square feet to square meters, acres to hectares, and between mm², cm², m², km², in², ft², yd², acres and square miles. ASCII Converter Free ASCII converter: convert text to decimal ASCII character codes, or turn a list of ASCII codes back into readable text. Instant and in your browser. Currency Converter Free currency converter with live exchange rates. Convert USD, EUR, GBP, INR, AUD, CAD and other world currencies, and compare rates from four providers. Data Storage Converter Free data storage converter: convert bits and bytes to KB, MB, GB, TB and PB using binary 1024-based units, the same sizes your operating system shows. Energy Converter Free energy converter: convert joules to calories, kcal to kJ, kWh to BTU and more between J, kJ, cal, kcal, Wh, kWh and BTU. Instant and accurate. Frequency Converter Free frequency converter: convert between hertz, kilohertz, megahertz, gigahertz and revolutions per minute (RPM). Instant results in your browser. Fuel Economy Converter Free fuel economy converter: convert MPG (US or UK) to L/100km and km/L, or back again. Compare car fuel consumption figures from any country. Hex to RGB Converter Free hex to RGB converter: turn a HEX color code like #3498DB into RGB values, or convert RGB values back to hex for CSS, design tools and code. Length Converter Free length converter: convert cm to inches, feet to meters, km to miles and more between mm, cm, m, km, inches, feet, yards and miles instantly. Number Base Converter Free number base converter: convert binary to decimal, decimal to hex, hex to binary and octal. Convert whole numbers between bases 2, 8, 10 and 16. Power Converter Free power converter: convert watts to horsepower, kW to hp, BTU per hour to watts and more between W, kW, MW, mechanical horsepower and BTU/h. Pressure Converter Free pressure converter: convert psi to bar, bar to kPa, atm to Pa, mmHg to torr and more. Ideal for tire pressure, weather and engineering values. Roman Numeral Converter Free Roman numeral converter: convert numbers to Roman numerals (like 2026 = MMXXVI) or Roman numerals back to numbers, from 1 to 3999. Speed Converter Free speed converter: convert km/h to mph, mph to km/h, knots, meters per second and feet per second. Instant, accurate speed conversion. Temperature Converter Free temperature converter: convert Celsius to Fahrenheit, Fahrenheit to Celsius, and to or from Kelvin, with the exact formula for every conversion. Torque Converter Free torque converter: convert newton-meters to pound-feet, lb-ft to Nm, pound-inches and kilogram-force meters for engines, bolts and torque wrenches. Unicode Converter Free Unicode converter: convert text, emoji and non-Latin characters to Unicode code points in U+XXXX notation, or decode code points back to text. Volume Converter Free volume converter: convert liters to gallons, ml to cups, fluid ounces to ml, teaspoons and tablespoons using US customary units. Great for recipes. Weight Converter Free weight converter: convert kg to lbs, pounds to kilograms, grams to ounces, stone and tonnes. Accurate mass conversion for cooking, fitness and shipping.

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