# Square Decimeters to Square Inches Converter

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Convert Square Inches to Square Decimeters (sq in to sq dm) ▶

## Conversion Table

 square decimeters to square inches sq dm sq in 1 sq dm 15.5 sq in 2 sq dm 31.0001 sq in 3 sq dm 46.5001 sq in 4 sq dm 62.0001 sq in 5 sq dm 77.5002 sq in 6 sq dm 93.0002 sq in 7 sq dm 108.5002 sq in 8 sq dm 124.0002 sq in 9 sq dm 139.5003 sq in 10 sq dm 155.0003 sq in 11 sq dm 170.5003 sq in 12 sq dm 186.0004 sq in 13 sq dm 201.5004 sq in 14 sq dm 217.0004 sq in 15 sq dm 232.5005 sq in 16 sq dm 248.0005 sq in 17 sq dm 263.5005 sq in 18 sq dm 279.0006 sq in 19 sq dm 294.5006 sq in 20 sq dm 310.0006 sq in

## How to convert

1 square decimeter (sq dm) = 15.500031 square inch (sq in). Square Decimeter (sq dm) is a unit of Area used in Metric system. Square Inch (sq in) is a unit of Area used in Standard system.

## Square Decimeter: A Unit of Area

A square decimeter is a unit of area in the metric system. It is equal to the area of a square with sides of one decimeter. The symbol for square decimeter is dm2.

## Definition of the Square Decimeter

The square decimeter is defined as the area of a square that has a side length of 1 decimeter, or one tenth of a meter. This is equivalent to 0.01 square meter, or 100 square centimeters, or 0.0001 square kilometer.

The square decimeter is a derived unit in the International System of Units (SI), which means that it is derived from the base unit of length, the meter. It is also a coherent unit, which means that it does not require any conversion factor when used with other SI units.

## History of the Square Decimeter

The square decimeter was introduced in France in 1795 as part of the metric system, which aimed to simplify and standardize the units of measurement. The metric system was based on the decimal system, which used powers of ten to relate different units of the same quantity.

The square decimeter was originally intended to be a unit of area equal to one hundredth of a square meter, or one ten-thousandth of a square kilometer. However, due to a mistake in the definition of the meter at that time, the actual area of a square decimeter was slightly smaller than intended. This error was corrected in 1889, when the meter was redefined based on the distance between two marks on a platinum-iridium bar kept in Paris.

The square decimeter became widely used throughout the world for measuring medium-sized areas, especially in science, engineering, and medicine. It is also used in some everyday applications, such as measuring floor space, paper size, and clothing size.

## How to Convert Square Decimeter to Other Units

To convert a square decimeter to other units of area, we can use the following conversion factors:

• 1 square decimeter = 0.01 square meter
• 1 square decimeter = 100 square centimeters
• 1 square decimeter = 0.0001 square kilometer
• 1 square decimeter = 15.500031 square inches
• 1 square decimeter = 0.107639104 square feet
• 1 square decimeter = 0.011959900 square yards

To convert from other units to a square decimeter, we can use the inverse of these conversion factors.

For example, to convert 50 square centimeters to square decimeters, we can use:

50 square centimeters x (0.01 dm2 / 1 cm2) = 0.5 dm2

## Where Square Decimeter is Used

The square decimeter is commonly used in many countries for measuring medium-sized areas, especially in science, engineering, and medicine. It is also used in some everyday applications, such as measuring floor space, paper size, and clothing size.

Some examples of uses of the square decimeter are:

• The average size of an adult human hand is about 4 dm2.
• The standard paper size for printing documents in most countries is A4, which has an area of about 6.237 dm2.
• The smallest unit of measurement for digital images is a pixel, which can have an area ranging from less than 0.000001 dm2 to more than 0.001 dm2 depending on the resolution and size of the screen.
• The largest coin in circulation in the European Union is the two euro coin, which has an area of about 0.314 dm2.
• The smallest country in the world by area, Vatican City, has an area of about 440000 dm2.

## Example Conversions of Square Decimeter to Other Units

Here are some example conversions of a square decimeter to other units:

• 1 square decimeter = 0.01 square meter
• 1 square decimeter = 100 square centimeters
• 1 square decimeter = 0.0001 square kilometer
• 1 square decimeter = 15.500031 square inches
• 1 square decimeter = 0.107639104 square feet
• 1 square decimeter = 0.011959900 square yards
• 1 square decimeter = 10000000000 nanometers^2
Square decimeters also can be marked as dm2.

## Square Inch: A Unit of Area

A square inch is a unit of area measurement of a space. It is equal to the area of a square with sides of one inch in length. The symbol for square inch is in2.

## Definition of the Square Inch

The square inch is defined as the area of a square that has a side length of 1 inch. This is equivalent to 0.00064516 square meter, or 6.4516 square centimeter, or 0.00000003937 square mile.

The square inch is not an official unit in the International System of Units (SI), but it is commonly used in the United States and the United Kingdom. It is also a customary unit in some other countries that use the imperial or US customary system of measurement.

## History of the Square Inch

The square inch was derived from the inch, which was originally based on the length of three barleycorns laid end to end. The inch was first standardized by King Edward II of England in 1324, who defined it as equal to three grains of barley, dry and round, placed end to end lengthwise.

The square inch was used as a unit of area for measuring land, buildings, and other objects. It was also used as a unit of pressure, such as pounds per square inch (psi), which is still widely used today.

The square inch was gradually replaced by the metric units of area, such as the square meter and the square centimeter, in most countries that adopted the metric system. However, it is still widely used in some fields and applications, such as engineering, carpentry, printing, and clothing.

## How to Convert Square Inch to Other Units

To convert a square inch to other units of area, we can use the following conversion factors:

• 1 square inch = 0.00064516 square meter
• 1 square inch = 6.4516 square centimeter
• 1 square inch = 0.00000003937 square mile
• 1 square inch = 0.00001076 square foot
• 1 square inch = 0.0001196 square yard
• 1 square inch = 645.16 square micrometer

To convert from other units to a square inch, we can use the inverse of these conversion factors.

For example, to convert 50 square centimeters to square inches, we can use:

50 square centimeters x (0.155000310 in2 / 1 cm2) = 7.7500155 in2

## Where Square Inch is Used

The square inch is commonly used in many countries for measuring small areas, especially in engineering, carpentry, printing, and clothing. It is also used as a unit of pressure, such as pounds per square inch (psi).

Some examples of uses of the square inch are:

• The average size of an adult human fingernail is about 0.5 in2.
• The standard paper size for printing documents in the United States and Canada is letter, which has an area of 93.5 in2.
• The smallest unit of measurement for digital images is a pixel, which can have an area ranging from less than 0.00000155 in2 to more than 0.0155 in2 depending on the resolution and size of the screen.
• The largest coin in circulation in the United States is the half dollar, which has an area of about 0.7854 in2.
• The smallest state in the United States by area, Rhode Island, has an area of about 777 billion in2.

## Example Conversions of Square Inch to Other Units

Here are some example conversions of a square inch to other units:

• 1 square inch = 0.00064516 square meter
• 1 square inch = 6.4516 square centimeter
• 1 square inch = 0.00000003937 square mile
• 1 square inch = 0.00001076 square foot
• 1 square inch = 0.0001196 square yard
• 1 square inch = 645.16 square micrometer
• 1 square inch = 1000000 nanometers^2
Square inches also can be marked as in2.

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