Unit Converter
Convert between common units of length, weight, volume, area, speed, time, data and temperature, using exact conversion factors.
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Unit Converter by TheCalcTools
How the Unit Converter works
Choose the kind of quantity, type a value, and pick the units to convert from and to. The converter turns your value into a base unit (metres, kilograms, litres, square metres, metres per second, seconds or bytes) and then into the target unit, using exact definitions.
Temperature is the exception: it uses formulas because the scales have different zero points. Data storage includes both decimal units (KB = 1,000 bytes, as used by drive makers and networks) and binary units (KiB = 1,024 bytes, as used by many operating systems). Results show up to eight significant digits.
The formula
Worked example
Convert 10 miles to kilometres:
| Quantity | Length |
|---|---|
| Value | 10 miles → kilometres |
- 1 mile is exactly 1,609.344 metres.
- 10 × 1,609.344 ÷ 1,000 = 16.09344 km.
- Result: 16.09344 km (1 mi = 1.609344 km).
Result:
| Result | 16.09344 |
|---|---|
| Conversion factor | 1 mi = 1.609344 km |
Frequently asked questions
How many kilometres are in a mile?
One mile is exactly 1.609344 kilometres.
What is the difference between MB and MiB?
A megabyte (MB) is 1,000,000 bytes; a mebibyte (MiB) is 1,048,576 bytes. Storage makers and networks use MB; many operating systems report MiB but label it MB.
Are US and imperial gallons the same?
No. A US gallon is 3.785 litres; an imperial gallon is 4.546 litres.
How do I convert Celsius to Fahrenheit?
Multiply by 9, divide by 5 and add 32. 100 °C is 212 °F.
Sources and further reading
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