Everyday calculators

Units converter

Type a conversion such as 5 ft to cm, or pick the units. The factor or formula is shown with every answer.

  • Runs on your device
  • Formulas
  • Free, no sign-up

Converts as you type. Your search stays on this page and is not added to the address.

Runs in your browser. Nothing you type or open is uploaded. Free to use, no account. More converters & calculators

How to use the units converter

  1. Type what you want, such as 5 ft to cm, kg to lb or 100 F to C. The converter picks the category and units and shows the answer as you type.
  2. Or choose a category, the from and to units and an amount. Press ⇄ to swap the units.
  3. Every answer shows the factor or formula, so you can check it or do it by hand. Temperature uses its formulas; fuel economy handles L/100 km, which goes down as mpg goes up.
  4. If a conversion has its own page with a table of common amounts, Open the pair page takes you there.
  5. Copy link to this conversion copies a link that opens the same units and amount. The address bar is not changed while you type.

All unit conversions

Distance

kilometers to milesmiles to kilometerscentimeters to inchesinches to centimetersmeters to feetfeet to metersmillimeters to inchesyards to meterskilometers to metersmeters to kilometersfeet to inchesinches to feetmeters to centimeterscentimeters to millimeters

Weight

kilograms to poundspounds to kilogramsgrams to ouncesounces to gramspounds to ouncesounces to poundskilograms to gramsstones to kilogramskilograms to stonesstones to poundstonnes to kilogramskilograms to tonnes

Volume

liters to US gallonsUS gallons to litersmilliliters to US cupsUS cups to millilitersliters to millilitersmilliliters to litersUS tablespoons to US teaspoonsUS teaspoons to US tablespoonsUS tablespoons to millilitersUS teaspoons to millilitersUS cups to US tablespoonsUS pints to millilitersUS fluid ounces to milliliters

Area

square meters to square feetsquare feet to square metersacres to hectareshectares to acres

Speed

kilometers per hour to miles per hourmiles per hour to kilometers per hour

Data

megabytes to gigabytesgigabytes to megabytesgigabytes to terabytes

Time

hours to minutesminutes to hoursdays to hoursdays to minutes

Pressure

pounds per square inch to barsbars to pounds per square inchpounds per square inch to kilopascals

Fuel economy

miles per gallon to kilometers per literkilometers per liter to miles per gallonmiles per gallon to liters per 100 kilometersliters per 100 kilometers to miles per gallon

Temperature

celsius to fahrenheitfahrenheit to celsiuscelsius to kelvinkelvin to celsiusfahrenheit to kelvinkelvin to fahrenheit

Private by design

Privacy

Conversions run in your browser. What you type in the search box stays on this page; this tool's code doesn't send it anywhere and doesn't add it to the page address.

Use in ChatGPT and Perplexity

Ask to convert a measurement. The factors are the same ones the Units Converter app uses. The connector does not take an account and does not store the prompt.

Perplexity Pro, Max, and Enterprise: Account settings, Connectors, Custom connector, Remote. Paste this URL. No API key.

https://mcp.bestlatestapps.com/units/mcp

ChatGPT lists the app in its directory after review. Until that listing is public, a developer adds the same URL with developer mode on, under Settings, Apps and Connectors.

Connector privacy

About the Converter : Units app

Link to this tool

Found it useful? You're welcome to link to it from your README, docs or blog.

Questions

How do I convert units here?

Type something like 5 ft to cm or 70 kg to lb in the box, or pick a category, the two units and an amount. The answer and the factor appear straight away.

Which units are included?

Distance, weight, temperature, volume, area, speed, data, time, pressure and fuel economy: the conversions people search for most. The Units Converter app has the rest.

How is temperature converted?

With formulas, not a single factor: °F = °C × 9/5 + 32, °C = (°F − 32) × 5/9 and K = °C + 273.15. The converter shows the formula it used, and it refuses values below absolute zero (0 K, −273.15 °C or −459.67 °F), the coldest possible temperature.

Are US or imperial gallons and cups used?

US measures: 1 US gallon is 3.785 liters and 1 US cup is 236.6 milliliters. Data units are binary, so 1 GB is 1,024 MB.

Is what I type saved or sent anywhere?

Conversions run in your browser. The last category and units are kept in this browser so the converter opens where you left it; the search text is not stored or added to the address.