Unit Converter

What you can convert

Eight categories are covered: length, weight, temperature, area, volume, speed, time and data storage. Choose a category, pick the From and To units, type a value and the result updates instantly. The swap button reverses the direction, which is useful when you are converting back and forth, such as kilometres and miles while planning a trip.

Examples worth knowing

• Length: 1 mile is exactly 1.609344 kilometres, so 5 miles is about 8.05 km.
• Temperature: °C = (°F − 32) × 5 ÷ 9, so 72 °F is about 22.2 °C. Temperature cannot be converted with a single multiplier because the scales start at different zero points.
• Weight: 1 kilogram is about 2.2046 pounds, handy for luggage limits and recipes.
• Data: storage vendors often count 1 GB as 1,000 MB while operating systems may count 1,024 MB, which is why a new drive shows less space than advertised.

Tips for reliable conversions

Check the unit names carefully: US and imperial gallons, and fluid ounces versus ounces of weight, are different quantities. For cooking and fuel economy, confirm which system a recipe or car manual uses. Round only your final answer, not the steps in between. If you need more than a single conversion, such as working out cost per kilogram from a price per pound, combine this tool with the Scientific Calculator or the Percentage Calculator. For money, use the Currency Converter, since exchange rates change daily.

When a result looks odd, check the order of the units first: converting 5 kilometres to miles gives about 3.1, while converting 5 miles to kilometres gives about 8.05, and mixing up From and To is the most common slip. The swap button fixes that in one tap. Results are shown with sensible rounding, so keep the unrounded figure in mind for engineering or scientific work.