The inch is a unit of length in the imperial and US customary systems, defined as exactly 25.4 millimeters.

The kilometer is a unit of length equal to 1,000 meters, commonly used to express distances between geographic locations.

Where is Inch used in everyday life?

Screen sizes (TVs, monitors), drill bit sizes, pipe diameters, screw dimensions, and rainfall measurement in the US.

What are common mistakes when converting Inch?

Forgetting that fractions of an inch use powers of 2 (1/2, 1/4, 1/8, 1/16), not decimal subdivisions like metric.

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"1" Inch

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Inch (in)

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Meter(m)Copy Answer
Attometer(am)Copy Answer
Femtometer(fm)Copy Answer
Picometer(pm)Copy Answer
Nanometer(nm)Copy Answer
Micrometer(µm)Copy Answer
Millimeter(mm)Copy Answer
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Decimeter(dm)Copy Answer
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Kilometer(km)Copy Answer
Megameter(Mm)Copy Answer
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Foot(ft)Copy Answer
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Mile(mi)Copy Answer
Planck Length(ℓP)Copy Answer
Electron Radius (Classical)(re)Copy Answer
Bohr Radius(a₀)Copy Answer
Earth's Equatorial Radius(R⊕ (eq))Copy Answer
Earth's Polar Radius(R⊕ (polar))Copy Answer
Astronomical Unit(AU)Copy Answer
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31 conversions shown

How to Convert Inch to Kilometer

To convert inches to cm: multiply by 2.54. To convert cm to inches: divide by 2.54.

1 in = 25.4 mm = 2.54 cm = 1/12 ft = 1/36 yd.

For example, 1 Inch (in) = 0.0000254 Kilometer (km).