# Square Inches to Square Kilometers Converter

Enter the area in square inches below to get the value converted to square kilometers.

Results in Square Kilometers: 1 sq in = 6.4516E-10 sq km
Hint: use a scientific notation calculator to convert E notation to decimal

Do you want to convert square kilometers to square inches?

## How to Convert Square Inches to Square Kilometers

To convert a measurement in square inches to a measurement in square kilometers, multiply the area by the following conversion ratio: 6.4516E-10 square kilometers/square inch.

Since one square inch is equal to 6.4516E-10 square kilometers, you can use this simple formula to convert:

square kilometers = square inches × 6.4516E-10

The area in square kilometers is equal to the area in square inches multiplied by 6.4516E-10.

For example, here's how to convert 5,000,000,000 square inches to square kilometers using the formula above.
square kilometers = (5,000,000,000 sq in × 6.4516E-10) = 3.2258 sq km

## What is a Square Inch?

One square inch is equivalent to the area of a square with sides that are each 1 inch in length. One square inch is equal to 1/144 of a square foot or 1/1,296 of a square yard.

The square inch is a US customary and imperial unit of area. A square inch is sometimes also referred to as a square in. Square inches can be abbreviated as sq in, and are also sometimes abbreviated as in². For example, 1 square inch can be written as 1 sq in or 1 in².

## What is a Square Kilometer?

One square kilometer is equivalent to the area of a square with sides that are each 1 kilometer in length. One square kilometer is equal to 0.386102 square miles or 1,000,000 square meters.

The square kilometer, or square kilometre, is a multiple of the square meter, which is the SI derived unit for area. In the metric system, "kilo" is the prefix for thousands, or 103. A square kilometer is sometimes also referred to as a square km. Square kilometers can be abbreviated as sq km, and are also sometimes abbreviated as km². For example, 1 square kilometer can be written as 1 sq km or 1 km².

## Square Inch to Square Kilometer Conversion Table

Table showing various square inch measurements converted to square kilometers.
Square Inches Square Kilometers
1 sq in 0.00000000064516 sq km
2 sq in 0.0000000012903 sq km
3 sq in 0.0000000019355 sq km
4 sq in 0.0000000025806 sq km
5 sq in 0.0000000032258 sq km
6 sq in 0.000000003871 sq km
7 sq in 0.0000000045161 sq km
8 sq in 0.0000000051613 sq km
9 sq in 0.0000000058064 sq km
10 sq in 0.0000000064516 sq km
100 sq in 0.000000064516 sq km
1,000 sq in 0.00000064516 sq km
10,000 sq in 0.0000064516 sq km
100,000 sq in 0.000064516 sq km
1,000,000 sq in 0.000645 sq km
10,000,000 sq in 0.006452 sq km
100,000,000 sq in 0.064516 sq km
1,000,000,000 sq in 0.64516 sq km
10,000,000,000 sq in 6.4516 sq km