Convert kilometers to inches

Precise decimal and fraction answers

The conversion in inches rounded to six significant decimal places is 1 km = 39,370.078740 in. The precise fraction answer is 39,370 ¹⁰/₁₂₇ in.

Answer in feet and inches

1 km equals 3280 ft 10 ⁵/₆₄ in using feet, inches and fractional inches instead of decimals as is traditional in the imperial system. This calculation is accurate to the nearest 1/64th of an inch.

How many inches are in a kilometer?

There are 39,370.079 inches in one kilometer. A kilometer is 39,370.079 times longer than an inch. An inch is 0.0025% of a kilometer

Kilometers to inches conversion factor and formulas

The conversion factor between kilometers and inches is 39,370.079. This represents the ratio of inches per one kilometer. To calculate the value in inches, we can either multiply by the conversion factor or divide by its inverse.

Multiplication

To convert from kilometers to inches, multiply kilometers by 39,370.079.
The formula is expressed as:
km × 39,370.079 = in

Division

Alternatively we can divide by the inverse conversion factor to get the same result.
The inverse of 39,370.079 is 1/39,370.079 or 0. To convert from kilometers to inches, divide kilometers by 0.
The formula is expressed as:
km ÷ 0 = in

About this conversion

Converting kilometers to inches is a conversion between units from separate unit systems - kilometers are metric (SI) defined units while inches are US Customary / UK Imperial .

About Kilometers

Within the SI (metric) system of measurement, the kilometer is officially defined as being equal to 1,000 meters. It is commonly used as measurement for geographic distances in similar circumstances where a mile would be used in the U.S. Internationally it is spelled 'kilometre' whereas the U.S. spells it 'kilometer'. The symbol for a kilometer is km however k is sometimes used.

About Inches

The inch is a length measurement within US Customary and British Imperial units of measure. It is officially defined as 25.4 millimeters. Twelve inches equal one foot and thirty six inches equal a yard in the US/Imperial systems. The abbreviation for inches is either in or " as in 12". When measuring in inches, it is common to subdivide the inch into fractional portions like a half-inch, quarter-inch, eighth of an inch etc. instead of using decimals. Inches are frequently used in the building construction trades in the US and Canada. Internationally, inches are a common measurement of tire size and display screen sizes. Historically the inch is derived from the width of an adult thumb.

Reverse this conversion

Convert from inches to kilometers instead.

References and Citations

1. International Bureau of Weights and Measures (BIPM) The International System of Units (SI)
2. National Institute of Standards and Technology (NIST) General Tables of Units of Measurement