Unit converter
Length, weight, temperature, area
In other units
- Millimeter (mm)
- 1000
- Centimeter (cm)
- 100
- Kilometer (km)
- 0.001
- Inch (in)
- 39.37007874
- Foot (ft)
- 3.280839895
- Yard (yd)
- 1.093613298
- Mile (mi)
- 0.0006213711922
- Ja 자 (30.3 cm)
- 3.3
Values are calculated on this device only and never saved.
How to use
- Under Conversion type, choose length, weight, temperature, area, volume, or speed.
- Pick the two units and type a number in Value to convert.
- You can also type in the Result box to convert the other way, or use the button between them to swap the units.
- See the same value in every other unit under In other units.
FAQ
Are gallons and cups US or imperial?
US. One gallon is 3.785411784 L, one cup is about 236.6 mL, and fluid ounces are US fluid ounces (about 29.57 mL). Imperial gallons (about 4.546 L) aren’t supported.
How do I convert Celsius to Fahrenheit?
Choose Temperature; Celsius and Fahrenheit are paired by default. Type in either box and the other updates, so 20°C shows 68°F. Temperatures below absolute zero (−273.15°C, −459.67°F, 0 K) don’t exist, so you’ll see a notice instead of a result.
What number formats can I type?
Commas and spaces are ignored, so 1,000 works. Scientific notation like 1e-3 works too. If anything other than a number is typed, you’ll see “Numbers only, please.”
Why does the result show an e or get rounded?
Results are rounded to 10 significant digits. Values of 10^15 or more, or smaller than 0.000001, are shown in scientific notation such as 1.5e-7.
What are pyeong, geun, and the other Korean units?
They’re traditional units still common in Korea. A pyeong is 400/121 m² (about 3.306 m²) and is used for floor area. A geun is counted here as 600 g, the measure for meat. A don is 3.75 g, often used for gold, and a ja is about 30.3 cm.