The hectare (/ˈhɛktɛər, -tɑːr/; SI symbol: ha) is a non-SI metric unit of area equal to a square with 100-metre sides (1 hm2), or 10,000 m2, and is primarily used in the measurement of land. There are 100 hectares in one square kilometre. An acre is about 0.405 hectare and one hectare contains about 2.47 acres.

You can think of a hectare (ha) as measuring 100m by 100m. Take the figure you have worked out in square metres (m²), then divide by 10,000 to find the number of hectares (ha). Use a calculator to convert an area in square metres (m²) into hectares (ha).

One square kilometer is equal to the area of a square with sides that are 1 kilometer in length. The square kilometer, or square kilometre, is a multiple of the square meter, which is the SI derived unit for area. In the metric system, “kilo” is the prefix for 103.

Square kilometre (International spelling as used by the International Bureau of Weights and Measures) or square kilometer (American spelling), symbol km2, is a multiple of the square metre, the SI unit of area or surface area. 1 km2 is equal to: 1,000,000 square metres (m2) 100 hectares (ha)

For example, to convert 100000 m2 to km2, multiply 100000 by 0.000001, that makes 0.1 km2 is 100000 m2.

1. square meters to square km formula.
2. square km = square meter * 0.000001.
3. square km = square meter / 1000000.

What is 1640.5986305km rounded to the nearest square kilometer

• 1641km. The rule for rounding is: If its 4 or less, you round down. If its 5 or above, you round up.
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Rounding to the nearest cent Look at the number to the right of the full cents, if the number is five or more, increase the cents by 1. If the number is four or less, keep the cents the same. For example: Round $143.864. Look at the last digit, that is 4, since 4 is less than 5 so keep cents the same.