Unit Converter
Conversion values used
1 mile = 1.609344 km, 1 foot = 0.3048 m, 1 inch = 2.54 cm, 1 pound = 0.45359237 kg, 1 ounce = 28.349523125 g, 1 acre = 0.40468564224 hectare. These are the international standard definitions. For data, 1 KB is counted as 1024 bytes.
Local units such as bigha
Units like bigha and guntha vary by state and region, so they are not included. For land transactions, use the value from your state revenue department.
Frequently asked questions
Why are negative values allowed for temperature?
Temperature can go below zero but not below absolute zero (−273.15 °C), so lower values show an error.
How many centimetres are in an inch?
One inch is exactly 2.54 centimetres.
How many square metres are in an acre?
One acre is about 4,046.86 square metres.
Is this tool free?
Yes. It is free to use, with no sign-up or login.
Does it work on my phone?
Yes. The page works on phone, tablet and computer browsers.
Which units can I convert?
Length, weight, temperature, area, volume, speed, time and data sizes. Pick a category and the units from the lists.
Can I swap the units?
Yes. Press Swap to reverse the From and To units.
How accurate are the results?
Results use the international standard values listed on the page, so they are accurate for everyday use.