A US public land survey section is one square mile or 640 acres.
Sections to Square Millimeters Converter — section to mm2
Convert Section (section) to Square Millimeter (mm2) using the exact conversion factor (1 section = 2.589988e+12 square millimeter). See the formula, worked examples, and conversion table.
Sections to Square Millimeters converter
Converter
Area Converter
Convert land, construction, mapping, survey, and scientific area units.
Context values
Some unit families need one extra value for a physically accurate result.
Square metric area unit.
Result = input x 2.58998811e+6 / 1e-6.
Area uses the square meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Sections to Square Millimeters
Comparing Section and Square Millimeter is common in agriculture and real estate, where US land is typically measured in acres and most of the rest of the world uses hectares. Specifically: A US public land survey section is one square mile or 640 acres, and square metric area unit.
Formula
square millimeters = sections × 2.589988e+12
This factor comes from each unit's defined relationship to the category's base unit: 1 section equals 2589988.11034 base units, and 1 square millimeter equals 0.000001 base units, so dividing one by the other gives the direct section-to-square millimeter factor of 2.589988e+12.
Simple example
1 section × 2.589988e+12 = 2.589988e+12 mm2
1 section = 2.589988e+12 square millimeters.
Real-world example
10 section × 2.589988e+12 = 2.589988e+13 mm2
10 sections = 2.589988e+13 square millimeters.
Conversion table
| Section (section) | Square Millimeter (mm2) |
|---|---|
| 1 section | 2.589988e+12 mm2 |
| 5 section | 1.294994e+13 mm2 |
| 10 section | 2.589988e+13 mm2 |
| 25 section | 6.47497e+13 mm2 |
| 50 section | 1.294994e+14 mm2 |
| 100 section | 2.589988e+14 mm2 |
Reverse conversion: Square Millimeter to Section
2.589988e+12 mm2 × 3.861022e-13 = 0.9999999574 section
2.589988e+12 square millimeters = 0.9999999574 sections.
sections = square millimeters × 3.861022e-13
For a page dedicated to this direction, see Square Millimeter to Section.
Understanding the Section (section)
A US public land survey section is one square mile or 640 acres.
Understanding the Square Millimeter (mm2)
Square metric area unit.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many square millimeters are in 1 section?
1 section equals 2.589988e+12 square millimeters, using the exact defined conversion factor rather than an estimate.
How do I convert section to square millimeter?
Multiply the section value by 2.589988e+12. The converter above does this instantly to whatever precision you set.
How do I convert square millimeter back to section?
Use the reverse factor: 1 square millimeter equals 3.861022e-13 sections. You can also use the swap control in the converter above to flip the direction instantly.
What is a section?
Section (section) is a unit of area.
What is a square millimeter?
Square Millimeter (mm2) is a unit of area.
Is the section to square millimeter conversion exact?
Yes. Both section and square millimeter are defined by fixed standards rather than physical artifacts, so the factor of 2.589988e+12 used above is exact to as many digits as you choose to display.