Convert length, weight, land area, volume, temperature, speed, data size and time using exact conversion factors.
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Most units people still use every day are now defined in terms of metric ones, and many of those definitions are exact rather than measured. Since the international yard and pound agreement of 1959, one yard is exactly 0.9144 metre and one pound is exactly 0.45359237 kilogram. Everything else in the imperial and US systems follows from those two numbers: an inch is 2.54 centimetres exactly, a mile is 1,609.344 metres, an acre is 43,560 square feet or 4,046.8564224 square metres. This converter stores those exact factors, as listed by NIST Special Publication 811, rather than rounded ones, so converting 100 acres gives 404,685.64224 square metres and not a figure that drifts in the third decimal place.
Property papers and listings in India mix several systems. Square yard, often called gaj in north India, is 9 square feet and is common for residential plots in Delhi, Uttar Pradesh and Telangana. Guntha, used in Maharashtra, Karnataka and Gujarat, is one fortieth of an acre: 121 square yards or 1,089 square feet. Cent, common in Kerala, Tamil Nadu and Andhra Pradesh, is one hundredth of an acre, or 435.6 square feet. The acre and the hectare, which is 10,000 square metres, are used everywhere, and the hectare is what official land records increasingly use.
You will not find bigha, biswa, kanal or marla here on purpose. A bigha in Assam, a bigha in West Bengal and a bigha in Uttar Pradesh are different sizes, and the size can change between districts of the same state. We could not confirm each value from an official government source, and a converter that silently assumes one state's bigha could cost you money in a land deal. Check the conversion used in your district's land records, then convert from square feet or square metres here.
Storage makers and network speeds use the decimal SI prefixes: a kilobyte is 1,000 bytes and a gigabyte is 1,000,000,000 bytes. Many operating systems count in powers of two instead, which the IEC names kibibyte (1,024 bytes), mebibyte and gibibyte. That is why a new 512 GB phone shows about 476 GiB of space. Both families are listed so you can see the difference. Network speeds are quoted in bits, not bytes: a 100 Mbps connection moves at most 12.5 megabytes a second.
A plot is advertised as 10 guntha. Choose Area and land, enter 10, convert from Guntha to Square foot, and you get 10,890 square feet, which is a quarter of an acre or about 1,011.7 square metres.
