How area conversion works
To convert between any pair of area units, the simplest approach is to use the square meter as an intermediate step, since it is the base unit of the International System. The input value is first turned into square meters, and that total is then converted into the desired target unit. That is exactly how this calculator works behind the scenes.
Conversion factors used
1 square meter = 10,000 square centimeters
1 square kilometer = 1,000,000 square meters
1 hectare = 10,000 square meters
1 acre = 4,046.8564224 square meters
1 square foot = 0.09290304 square meters
1 square mile = 2,589,988.110336 square meters
Worked example
A 50 hectare farm equals 500,000 square meters, since each hectare is exactly 10,000 square meters. In acres, the same 50 hectares correspond to roughly 123.55 acres, because each acre is about 0.4047 hectares.
Hectares and acres: common units for rural land
The hectare is the standard unit for measuring large areas of land across most of the world, widely used in agriculture and rural real estate. The acre, on the other hand, is the traditional unit used in the United States and United Kingdom for the same purpose. A hectare is considerably larger than an acre: it takes roughly 2.47 acres to make up a hectare, which often causes confusion in international comparisons of rural properties.
Calculating area from length and width
The most common way to find the area of a plot, room or rectangular lot is to multiply the length by the width, as long as both measurements use the same unit. For example, a plot 10 meters long and 20 meters wide has an area of 200 square meters. The calculator on this page runs that calculation automatically and converts the result into square meters and hectares, making it easier to compare with other plots.