How do I convert km to in?

Use the formula shown above or enter a value to see km converted to in instantly.

What is the formula for km to in?

The converter calculates in by applying the category-specific conversion factor for Length.

km and in are both part of the Length category; pick the unit that matches your measurement context (e.g., scale, region, or industry standard).

Length Converter & Reference

Use the live converter below to translate between Kilometer (km) and Inch (in). Scroll further for quick examples, formula tips, and related units.

Formula insight: Most unit conversions use a simple multiplication or division by a conversion factor. The calculator shows the exact formula used.

Convert

Kilometer

Inch

39,370.0787

Rounded result (4 decimals max)

Formula

1 km = 39,370.0787 in

Conversion sourcesTap or click to view references

The International System of Units (SI) — NIST Special Publication 330
National Institute of Standards and Technology (NIST). The SI Brochure (SP 330) is the definitive English edition of the BIPM SI tables. NIST’s edition lists the official constants and conversion factors tying inch-pound units to SI, which SwapUnits applies for length, mass, temperature, pressure, volume, and related conversions. See /standards/nist-si-tenfold for the complete decimal multiple/submultiple table. View source · View SI table

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