Bytes, bits, MB and MiB: why your drive has “less” space
The difference between decimal and binary units, and between megabits and megabytes, with examples.
Unit converter
Convert length, weight, temperature and more.
Runs in your browser
You can use a dot or comma as the decimal separator.
Result
6.213711922 mi
10 km = 6.213711922 mi
1 km = 0.6213711922 mi
| Millimetres | 10,000,000 mm |
|---|---|
| Centimetres | 1,000,000 cm |
| Metres | 10,000 m |
| Inches | 393,700.7874 in |
| Feet | 32,808.39895 ft |
| Yards | 10,936.13298 yd |
| Miles | 6.213711922 mi |
| Nautical miles | 5.399568035 nmi |
What it does: Unit converter
Convert between metric and imperial/US units: kilometres to miles, kilograms to pounds, Celsius to Fahrenheit, bar to psi, kilocalories to kilojoules or litres per 100 km to miles per gallon, and many more. You always choose the source and target units explicitly to avoid mix-ups.
Besides the result, you get the conversion factor (or the formula, for temperatures) and the value in every unit of the same quantity.
How to use it
- Choose the quantity: length, weight, temperature, volume, area, speed, time, pressure, energy or fuel consumption.
- Enter the value and select the source and target units.
- Use the ⇄ button to reverse the conversion.
Examples
American recipe
1 US cup is about 237 ml, and 1 ounce (weight) is 28.35 g.
Driving abroad
A 100 km/h limit is about 62.1 mph.
Tyre pressure
2.3 bar is about 33.4 psi, the unit many petrol-station gauges use.
Limits, formulas and assumptions
- Exact factors from international definitions: 1 inch = 2.54 cm; 1 pound = 0.45359237 kg; 1 mile = 1,609.344 m.
- Kitchen measures (cup, tablespoon, fluid ounce) are US measures; UK and other countries' versions may differ slightly.
- US gallons (3.785 l) and UK gallons (4.546 l) are different: pick the right one.
- A year is taken as 365 days.
- Fuel consumption isn't proportional: a car using fewer L/100 km does more miles per gallon, so it's converted with the inverse.
Frequently asked questions
How do I convert Celsius to Fahrenheit in my head?
Roughly, double it and add 30: 20 °C ≈ 70 °F (exactly 68 °F).
Why aren't digital units (MB, GB) here?
They have their own tool, the digital size converter, which separates decimal and binary units.
How many digits are shown?
Up to 10 significant digits; extreme values use scientific notation.
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