How do I convert Kilometer (km) to Inch (in)?

1 km equals 39370.07874 in using SI-based conversion and precise factors.

What is the formula to convert Kilometer (km) to Inch (in)?

This is a linear unit conversion using a constant factor between units.

Yes, it uses exact definitions or standardized constants (e.g., 1 in = 25.4 mm).

Use the shareable URL pattern: /convert/km-to-in/1

Category: Length

Value From To Precision

39370.07874 in

1 km = 39370.07874 in

High-precision rounding: 6 decimals

We convert by pivoting through the SI base unit for Length and applying exact factors where applicable.

Share this conversion: /convert/km-to-in/1

Length measures distance. SI base is the meter; many legacy units survive in trade and navigation.

Kilometer (km)

1,000 meters. Common for road and geographic distances.

History: Adopted with the metric system during the 19th century.

Inch (in)

Imperial/US customary unit of length; exactly 25.4 mm.

History: Fixed at exactly 25.4 mm by international agreement in 1959.