Area Converter
Square millimeter
Definition: A square millimeter (symbol: mm┬▓) is a unit of area in the metric system equal to the area of a square with sides of one millimeter.
History/origin: The square millimeter is derived from the SI base unit of length, the meter. The prefix "milli-" indicates one-thousandth, so a square millimeter is one millionth of a square meter.
Current use: Square millimeters are primarily used in scientific fields, engineering, and manufacturing to measure very small areas, such as the cross-section of electrical wires or tiny electronic components.
Acre
Definition: An acre is a unit of land area used in the imperial and US customary systems. It is traditionally defined as the area of one chain by one furlong (66 by 660 feet), which is exactly 43,560 square feet.
History/origin: Historically, during the Middle Ages in England, an acre was defined as the amount of land that could be plowed in one day by a yoke of oxen.
Current use: The acre is still widely used to measure tracts of land and farming areas in the United States, the United Kingdom, and Canada.
Square millimeter to Acre Conversion Table
| Square millimeter [mm2] | Acre [ac] |
|---|---|
| 0.01 mm2 | 0 ac |
| 0.1 mm2 | 0 ac |
| 1 mm2 | 0 ac |
| 2 mm2 | 0 ac |
| 3 mm2 | 0 ac |
| 5 mm2 | 0 ac |
| 10 mm2 | 0 ac |
| 20 mm2 | 0 ac |
| 50 mm2 | 0.00000001 ac |
| 100 mm2 | 0.00000002 ac |
| 1000 mm2 | 0.00000025 ac |
How to Convert Square millimeter to Acre
1 mm2 = 0 ac
1 ac = 4046856420.00000048 mm2
Example: convert 15 mm2 to ac:
15 mm2 = 15 × 0 ac = 0 ac
Did You Know?
- In the Middle Ages, one acre was defined as the amount of land that a yoke of oxen could plow in a single day.