The question, as stated, cannot be answered sensibly. An acre is a measure of area, with dimensions [L2]. A kilometre is a measure of distance, with dimensions [L]. The two measure different things and elementary dimensional analysis teaches that you cannot convert between measures with different dimensions such as these without additional information.
1 million (square meters) = 247.105381 acres
One million what?
One kilometer
2.5 acres
There are one million millimeters in a kilometer, so a millimeter would represent one millionth of a kilometer.
1 million (square meters) = 247.105381 acres
One acre is 0.004 square kilometers, so 166 square kilometers would be 41,500 acres.
One million what?
Kilometers measure length and acres measure area. Therefore, one can't convert kilometers to acres.
one acre is 43,560 square feet. So, one million acres would be 43,560,000,000 square feet.
really? 1,000,000
Acres are used for measuring area, while kilometers are used for measuring distance. These two units can't be converted between one to another.
One million millimetres is equal to one kilometre.
A mile is a linear measurement. An acre is the measurement of area. It is not possible to compare acres to miles.
1 millimeters = 0.000001 kilometers
Capella is a binary system. One star is approximately 15.4 million kilometers in diameter, the other is approximately 11.5 million kilometers in diameter.
1,500,000 (One and a half million)