About this tool
The Area Converter changes one area value into every common metric and imperial unit at once: square millimetres, square centimetres, square metres, ares, hectares, square kilometres, square inches, square feet, square yards, acres and square miles. Enter a number, choose the starting unit, and read them all together in the grid.
Conversion is linear with the square metre as the base unit. The factors come directly from squared length definitions: 1 ft² = 0.09290304 m², 1 in² = 0.00064516 m², 1 yd² = 0.83612736 m², 1 acre = 4046.8564224 m², 1 hectare = 10000 m² and 1 mi² = 2589988.110336 m². The value is converted to square metres (value ÷ source factor) and multiplied by each target factor, keeping every result exact.
This is handy for real estate, land, flooring and mapping work — for example converting a plot in acres to hectares or a room in square feet to square metres. Everything runs locally in your browser with plain JavaScript; nothing is uploaded, and very small or very large results are shown in scientific notation while everyday values round to six decimals.