Converters
Convert length, weight, temperature, cooking measures and data sizes.
Unit conversion is one of the most common everyday searches. These focused converters show the exact factor, the result in several related units and a short explanation so you can check the answer rather than trusting a black box.
All Calculators51
CM to Inches Converter
Convert centimetres to inches and feet, with a quick height reference.
KG to Pounds Converter
Convert kilograms to pounds and ounces, with stone reference.
Celsius to Fahrenheit Converter
Convert Celsius to Fahrenheit and Kelvin, with common reference points.
Cups to Millilitres Converter
Convert US cups to millilitres, fluid ounces and tablespoons.
Angle degrees to radians
Convert angles between degrees, radians, gradians and turns, with exact π fractions.
Area m2 to ft2
Convert square metres to square feet and back, with square yards and hectares.
Clothing men US to EU
Convert men’s suit and jacket sizes from US to EU labels, with the chest measurement in centimetres.
Clothing women US to EU
Convert women’s US dress sizes to EU labels and see the equivalent UK size.
Cooking grams to oz
Convert grams to ounces and pounds, with an optional per-serving split for recipes.
Cooking oven C to F
Convert oven temperatures between Celsius and Fahrenheit, with fan and gas mark equivalents.
Cooking tbsp to tsp
Convert tablespoons to teaspoons, millilitres and fluid ounces for US, metric and Australian measures.
Currency manual rate
Convert an amount with an exchange rate you supply, including an optional fee.
Data B to KB
Convert bytes to kilobytes, megabytes and gigabytes using decimal or binary units.
Data MB to GB
Convert megabytes to gigabytes and terabytes with decimal or binary definitions.
Energy kJ to kcal
Convert kilojoules to kilocalories and see the food energy per serving.
Fuel L/100km to mpg US
Convert litres per 100 km to US and UK miles per gallon, with fuel needed for a trip.
Length km to miles
Convert kilometres to miles, with metres and nautical miles for reference.
Length m to feet
Convert metres to feet and inches, with a choice of inch precision.
Pace min/km to min/mi
Convert running pace from minutes per kilometre to minutes per mile, with a race finish estimate.
Paper A4 to Letter
Compare A4 and US Letter paper sizes, with area and stack weight.
Screen aspect ratio
Find a screen’s width, height and pixel density from its diagonal and aspect ratio.
Shoe size US to EU
Convert US shoe sizes to EU and UK sizes for men and women, with a foot-length check.
Speed kmh to mph
Convert kilometres per hour to miles per hour, metres per second and knots.
Time minutes to hours
Convert minutes to decimal hours and hours-and-minutes, with seconds for precision.
Time seconds to minutes
Convert seconds to minutes, hours and video frames.
Time zone offset
Convert a local time between UTC offsets and see whether the date changes.
Volume litres to US gallons
Convert litres to US gallons, UK gallons and pints.
Volume ml to fl oz
Convert millilitres to US or UK fluid ounces, with tablespoons and cups.
Weight g to ounces
Convert grams to ounces and pounds, with a per-serving option.
Unit Converter - Convert Length, Weight, Temperature Online
Free unit converter for length, weight, temperature, volume, speed, and area. Convert metric to imperial and back instantly.
Hat size conversion
Convert a head measurement into US, UK and metric hat sizes with an eighth-inch size guide.
Print size
Work out the printed dimensions of an image at a chosen DPI, in inches or centimetres.
Resolution px to cm
Convert pixel dimensions into physical centimetres and inches at a given pixels-per-inch value.
Ring size conversion
Convert between US, UK and EU ring sizes from a diameter or circumference measurement.
Area acre to hectare
Convert acres to hectares and back, with square metre and square foot equivalents.
Bandwidth Mbps to MB/s
Convert a network speed between megabits and megabytes per second, with transfer times.
CSS rem to px
Convert rem values to pixels, or pixels back to rem, at any root font size.
Cooking butter sticks
Convert butter between US sticks, cups, grams, tablespoons and ounces.
Crypto manual rate
Convert a crypto amount at a rate you enter yourself, with an optional conversion fee.
Data GB to TB
Convert gigabytes and terabytes using decimal or binary unit standards.
Force N to lbf
Convert force between newtons, pound-force, kilogram-force and poundals.
Frequency Hz to rpm
Convert frequency in hertz to revolutions per minute, with angular velocity and period.
Fuel mpg UK to US
Compare UK and US fuel economy, and convert to litres per 100 km and km per litre.
Hard drive real capacity
See how much of an advertised drive capacity is usable after binary reporting and formatting.
Power W to hp
Convert power between watts, kilowatts, mechanical horsepower and metric PS.
Pressure bar to psi
Convert pressure between bar, psi, kilopascals and atmospheres.
Shoe size UK to US
Convert adult UK shoe sizes to US and EU sizes for men and women.
Temperature C to K
Convert Celsius to Kelvin and Fahrenheit, with a check against absolute zero.
Time hours to days
Convert hours to days, weeks and working days, or go the other way.
Torque Nm to lb-ft
Convert torque between newton-metres and pound-feet, with pound-inches and kgf·m.
Typography pt to px
Convert typographic points to pixels at a chosen PPI, or pixels back to points.
Frequently asked questions
Why are some conversions not exact?
Most unit definitions are exact, but display rounding can change the last digit. The underlying factor is shown with each result.
Is a US cup the same as a metric cup?
No. A US customary cup is about 236.6 ml; a metric cup is 250 ml. The difference matters in baking.