Convert anything to anything, instantly. Length, weight, temperature, area, volume, speed, data storage and dozens of single-pair conversions like cm to inches and kg to lbs, each on its own fast page. No ads, no sign-up, and it works the moment you type. All 79 tools below are free, run in your browser, and need no sign-up.
Free length and distance converter. Convert between millimeters, centimeters, meters, kilometers, inches, feet, yards, and miles instantly as you type.
Free weight and mass converter. Convert between grams, kilograms, metric tonnes, ounces, pounds, and stones instantly with exact factors as you type.
Free temperature converter. Convert between Celsius, Fahrenheit, and Kelvin instantly with correct offset formulas, updating live as you type a value.
Free volume converter. Convert between milliliters, liters, US and imperial gallons, quarts, pints, cups, and fluid ounces instantly as you type.
Free area converter. Convert between square meters, square feet, square kilometers, acres, hectares, square miles, and more instantly as you type.
Free speed converter. Convert between meters per second, km/h, mph, knots, and feet per second instantly with exact factors, updating live as you type.
Free time unit converter. Convert between seconds, minutes, hours, days, weeks, months, and years instantly with exact factors, updating live as you type.
Free digital storage converter. Convert between bytes, KB, MB, GB, TB, and PB using decimal (1000) or binary (1024) units, live as you type.
Free pressure converter. Convert between pascals, kilopascals, bar, psi, atmospheres, mmHg, and torr instantly with exact factors, live as you type.
Free energy converter. Convert between joules, kilojoules, calories, kilocalories, watt-hours, kilowatt-hours, and BTU instantly as you type.
Free power converter. Convert between watts, kilowatts, megawatts, horsepower (metric and mechanical), and BTU per hour instantly as you type.
Free fuel economy converter. Convert between miles per gallon (US and UK) and liters per 100 km using the correct reciprocal formula, live as you type.
Free angle converter. Convert between degrees, radians, gradians, arcminutes, arcseconds, and full turns instantly with exact factors, live as you type.
Free cooking measurement converter. Convert between cups, tablespoons, teaspoons, fluid ounces, and milliliters for recipes instantly as you type.
Free shoe size converter. Convert US, UK, EU, and centimeter shoe sizes for men and women using standard sizing tables, updating live as you type.
Free frequency converter. Convert between hertz, kilohertz, megahertz, gigahertz, and RPM instantly with exact factors, updating live as you type.
Free cm to inches converter. Convert centimeters to inches instantly using the exact factor (1 inch = 2.54 cm). Live result as you type, no sign-up.
Free inches to cm converter. Convert inches to centimeters instantly using the exact factor (1 inch = 2.54 cm). Live result as you type, private.
Free kg to lbs converter. Convert kilograms to pounds instantly using the exact factor (1 kg = 2.2046226218 lb). Live result as you type, no sign-up.
Free lbs to kg converter. Convert pounds to kilograms instantly using the exact factor (1 lb = 0.45359237 kg). Live result as you type, private.
Free Celsius to Fahrenheit converter. Convert C to F instantly using the correct formula (F = C x 9/5 + 32). Live result as you type, no sign-up.
Free Fahrenheit to Celsius converter. Convert F to C instantly using the correct formula (C = (F - 32) x 5/9). Live result as you type, private.
Free feet to cm converter. Convert feet to centimeters instantly using the exact factor (1 ft = 30.48 cm). Live result as you type, no sign-up.
Free meters to feet converter. Convert meters to feet instantly using the exact factor (1 m = 3.280839895 ft). Live result as you type, private.
Free miles to km converter. Convert miles to kilometers instantly using the exact factor (1 mile = 1.609344 km). Live result as you type, no sign-up.
Free km to miles converter. Convert kilometers to miles instantly using the exact factor (1 km = 0.6213711922 mi). Live result as you type, private.
Free ml to oz converter. Convert milliliters to US fluid ounces instantly (1 fl oz = 29.5735 mL). Live result as you type, no sign-up, private.
Free mm to inches converter. Convert millimeters to inches instantly using the exact factor (1 inch = 25.4 mm). Live result as you type, private.
Free grams to ounces converter. Convert grams to ounces instantly using the exact factor (1 oz = 28.3495 g). Live result as you type, no sign-up.
Free liters to gallons converter. Convert liters to US gallons instantly (1 US gallon = 3.785411784 L). Live result as you type, no sign-up, private.
Free Celsius to Kelvin converter. Convert C to K instantly using the exact offset (K = C + 273.15). Live result as you type, no sign-up, private.
Free Roman numeral converter. Convert numbers to Roman numerals and Roman numerals back to numbers instantly, both directions, live as you type.
Free binary to decimal converter. Convert binary numbers to decimal instantly with input validation, updating live as you type. No sign-up, private.
Free decimal to binary converter. Convert decimal numbers to binary instantly with input validation, updating live as you type. No sign-up, private.
Free hex to decimal converter. Convert hexadecimal numbers to decimal instantly with input validation, updating live as you type. No sign-up, private.
Free kph to mph converter. Convert kilometers per hour to miles per hour instantly (1 mph = 1.609344 km/h). Live result as you type, no sign-up.
Free mph to kph converter. Convert miles per hour to kilometers per hour instantly (1 mph = 1.609344 km/h). Live result as you type, private.
Free pounds to kg converter. Convert pounds to kilograms instantly using the exact factor (1 lb = 0.45359237 kg). Live result as you type, no sign-up.
Free oz to grams converter. Convert ounces to grams instantly using the exact factor (1 oz = 28.349523125 g). Live result as you type, no sign-up.
Free cups to ml converter. Convert US cups to milliliters instantly using the exact factor (1 cup = 236.5882365 mL). Live result as you type, private.
Free ml to cups converter. Convert milliliters to US cups instantly using the exact factor (1 cup = 236.5882365 mL). Live result as you type, no sign-up.
Free tbsp to ml converter. Convert US tablespoons to milliliters instantly (1 tbsp = 14.7868 mL). Live result as you type, no sign-up, private.
Free tsp to ml converter. Convert US teaspoons to milliliters instantly (1 tsp = 4.9289 mL). Live result as you type, no sign-up, private.
Free stone to lbs converter. Convert stone to pounds instantly using the exact factor (1 stone = 14 lb). Live result as you type, no sign-up, private.
Free lbs to stone converter. Convert pounds to stone instantly using the exact factor (1 stone = 14 lb). Live result as you type, no sign-up, private.
Free stone to kg converter. Convert stone to kilograms instantly using the exact factor (1 stone = 6.35029318 kg). Live result as you type, private.
Free fl oz to ml converter. Convert US fluid ounces to milliliters instantly (1 fl oz = 29.5735 mL). Live result as you type, no sign-up, private.
Free gallons to liters converter. Convert US gallons to liters instantly (1 US gallon = 3.785411784 L). Live result as you type, no sign-up, private.
Free MB to GB converter. Convert megabytes to gigabytes instantly using decimal units (1 GB = 1000 MB). Live result as you type, no sign-up, private.
Free GB to MB converter. Convert gigabytes to megabytes instantly using decimal units (1 GB = 1000 MB). Live result as you type, no sign-up, private.
Free KB to MB converter. Convert kilobytes to megabytes instantly using decimal units (1 MB = 1000 KB). Live result as you type, no sign-up, private.
Free GB to TB converter. Convert gigabytes to terabytes instantly using decimal units (1 TB = 1000 GB). Live result as you type, no sign-up, private.
Free bytes to KB converter. Convert bytes to kilobytes instantly using decimal units (1 KB = 1000 bytes). Live result as you type, no sign-up, private.
Free watts to horsepower converter. Convert watts to mechanical horsepower instantly (1 hp = 745.7 W). Live result as you type, no sign-up, private.
Free horsepower to watts converter. Convert mechanical horsepower to watts instantly (1 hp = 745.7 W). Live result as you type, no sign-up, private.
Free psi to bar converter. Convert pounds per square inch to bar instantly (1 bar = 14.5038 psi). Live result as you type, no sign-up, private.
Free bar to psi converter. Convert bar to pounds per square inch instantly (1 bar = 14.5038 psi). Live result as you type, no sign-up, private.
Free pascal to psi converter. Convert pascals to pounds per square inch instantly (1 psi = 6894.76 Pa). Live result as you type, no sign-up, private.
Free square meters to square feet converter. Convert m2 to ft2 instantly (1 m2 = 10.7639 ft2). Live result as you type, no sign-up, private.
Free square feet to square meters converter. Convert ft2 to m2 instantly (1 ft2 = 0.092903 m2). Live result as you type, no sign-up, private.
Free hectares to acres converter. Convert hectares to acres instantly (1 hectare = 2.47105 acres). Live result as you type, no sign-up, private.
Free acres to hectares converter. Convert acres to hectares instantly (1 acre = 0.404686 hectares). Live result as you type, no sign-up, private.
Free knots to mph converter. Convert knots to miles per hour instantly (1 knot = 1.15078 mph). Live result as you type, no sign-up, private.
Free tons to pounds converter. Convert US short tons to pounds instantly using the exact factor (1 ton = 2000 lb). Live result in your browser as you type.
Free pounds to tons converter. Convert pounds to US short tons instantly using the exact factor (1 ton = 2000 lb). Live result in your browser as you type.
Free kg to stone converter. Convert kilograms to stone instantly using the exact factor (1 stone = 6.35029318 kg). Live result in your browser as you type.
Free ounces to grams converter. Convert ounces to grams instantly using the exact factor (1 oz = 28.349523125 g). Live result in your browser as you type.
Free teaspoons to tablespoons converter. Convert tsp to tbsp instantly using the exact ratio (1 tbsp = 3 tsp). Live result in your browser as you type.
Free gallons to cups converter. Convert US gallons to cups instantly using the exact ratio (1 gallon = 16 cups). Live result in your browser as you type.
Free quarts to liters converter. Convert US quarts to liters instantly using the exact factor (1 quart = 0.946352946 L). Live result in your browser as you type.
Free pints to milliliters converter. Convert US pints to mL instantly using the exact factor (1 pint = 473.176473 mL). Live result in your browser as you type.
Free yards to feet converter. Convert yards to feet instantly using the exact ratio (1 yard = 3 feet). Live result in your browser as you type.
Free miles to feet converter. Convert miles to feet instantly using the exact ratio (1 mile = 5280 feet). Live result in your browser as you type.
Free bits to bytes converter. Convert bits to bytes instantly using the exact ratio (1 byte = 8 bits). Live result in your browser as you type.
Free megabits to megabytes converter. Convert Mbps to MB per second instantly (8 bits = 1 byte). Live result in your browser as you type.
Free degrees to radians converter. Convert degrees to radians instantly using the exact factor (pi/180). Live result in your browser as you type.
Free radians to degrees converter. Convert radians to degrees instantly using the exact factor (180/pi). Live result in your browser as you type.
Free Celsius to Rankine converter. Convert C to Rankine instantly using the correct formula (R = C x 1.8 + 491.67). Live result in your browser as you type.
Free Fahrenheit to Kelvin converter. Convert F to K instantly using the correct formula (K = (F - 32) x 5/9 + 273.15). Live result in your browser as you type.
Yes. Every tool in this toolkit is completely free, with no sign-up and no usage limits.
Yes. They run in any modern web browser on phone, tablet or desktop, with nothing to install.
Yes. These tools run entirely in your browser, so nothing you enter is uploaded to a server.