A square inch is the area of a one-inch square.
Square inches to Square Decimeters Converter — in2 to dm2
Convert Square inch (in2) to Square Decimeter (dm2) using the exact conversion factor (1 square inch = 0.064516 square decimeter). See the formula, worked examples, and conversion table.
Square inches to Square Decimeters 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 0.00064516 / 0.01.
Area uses the square meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Square inches to Square Decimeters
Comparing Square inch and Square Decimeter 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 square inch is the area of a one-inch square, and square metric area unit.
Formula
square decimeters = square inches × 0.064516
This factor comes from each unit's defined relationship to the category's base unit: 1 square inch equals 0.00064516 base units, and 1 square decimeter equals 0.01 base units, so dividing one by the other gives the direct square inch-to-square decimeter factor of 0.064516.
Simple example
1 in2 × 0.064516 = 0.064516 dm2
1 square inch = 0.064516 square decimeters.
Real-world example
10 in2 × 0.064516 = 0.64516 dm2
10 square inches = 0.64516 square decimeters.
Conversion table
| Square inch (in2) | Square Decimeter (dm2) |
|---|---|
| 1 in2 | 0.064516 dm2 |
| 5 in2 | 0.32258 dm2 |
| 10 in2 | 0.64516 dm2 |
| 25 in2 | 1.6129 dm2 |
| 50 in2 | 3.2258 dm2 |
| 100 in2 | 6.4516 dm2 |
Reverse conversion: Square Decimeter to Square inch
0.064516 dm2 × 15.500031 = 1 in2
0.064516 square decimeters = 1 square inches.
square inches = square decimeters × 15.5000310001
For a page dedicated to this direction, see Square Decimeter to Square inch.
Understanding the Square inch (in2)
A square inch is the area of a one-inch square.
Understanding the Square Decimeter (dm2)
Square metric area unit.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many square decimeters are in 1 square inch?
1 square inch equals 0.064516 square decimeters, using the exact defined conversion factor rather than an estimate.
How do I convert square inch to square decimeter?
Multiply the square inch value by 0.064516. The converter above does this instantly to whatever precision you set.
How do I convert square decimeter back to square inch?
Use the reverse factor: 1 square decimeter equals 15.500031 square inches. You can also use the swap control in the converter above to flip the direction instantly.
What is a square inch?
Square inch (in2) is a unit of area.
What is a square decimeter?
Square Decimeter (dm2) is a unit of area.
Is the square inch to square decimeter conversion exact?
Yes. Both square inch and square decimeter are defined by fixed standards rather than physical artifacts, so the factor of 0.064516 used above is exact to as many digits as you choose to display.