Instant · Precise · Universal
23 units available
6 categories total
To convert in² to cm²: multiply by 6.4516. To ft²: divide by 144.
1 in² = 6.4516 cm² = 645.16 mm². There are 144 in² in 1 ft² and 1,296 in² in 1 yd².
For example, 1 Square Inch (in²) = 6.919380e-12 Township (township).
| Square Inch (in²) | Township (township) |
|---|---|
| 0.1 | 6.919380e-13 |
| 0.5 | 3.459690e-12 |
| 1 | 6.919380e-12 |
| 2 | 1.383876e-11 |
| 5 | 3.459690e-11 |
| 10 | 6.919380e-11 |
| 25 | 1.729845e-10 |
| 50 | 3.459690e-10 |
| 100 | 6.919380e-10 |
| 500 | 3.459690e-9 |
| 1000 | 6.919380e-9 |
The square inch is an imperial unit of area equal to the area of a square with sides of exactly one inch (6.4516 cm²).
1 in² = 6.4516 cm² = 645.16 mm². There are 144 in² in 1 ft² and 1,296 in² in 1 yd².
To convert in² to cm²: multiply by 6.4516. To ft²: divide by 144.
PSI (pounds per square inch) pressure measurement, print resolution, material cross-sections, and small parts dimensions.
The resolution of printed photos is measured in DPI (dots per inch). A 300 DPI print has 90,000 dots per square inch.
Thinking 1 ft² = 12 in² (it's actually 144 in², since 12 × 12 = 144). The square of the conversion factor catches people off guard.
Remember: 1 ft = 12 in, so 1 ft² = 12² in² = 144 in². Always square the linear conversion factor.
A township (survey) is a unit of land area equal to 36 square miles (93.24 km²), used in the US Public Land Survey System.
1 township = 36 sections = 36 mi² = 23,040 acres ≈ 93.24 km².
To convert townships to sections: multiply by 36. To acres: multiply by 23,040. To km²: multiply by 93.24.
Legal land descriptions in the western US, mineral rights boundaries, and county subdivision.
Indiana was the first state fully surveyed using the township system (1799–1834). The grid is still visible in satellite imagery.
Confusing 'township' (the survey unit = 36 mi²) with 'township' as a political subdivision, which can vary in size.
A township = 6 mi × 6 mi = 36 sections. Each section = 1 mi² = 640 acres. It's a nested grid system.



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