Free · Unit conversions

Micrometer, Metric & Customary Length Converter

Convert micrometers alongside metric, customary and selected scientific length scales.

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Enter the known values in the units shown. Results update as you type.
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25,400 micrometers equal 25.4 millimeters, 0.0254 meters, one international inch or 254,000,000 angstroms.

Meters = micrometers × 10⁻⁶; inches = micrometers ÷ 25400; angstroms = micrometers × 10000

Enter these known values and leave the other values blank.

A micrometer (µm), also called a micron, is exactly one millionth of a meter. The international inch is exactly 0.0254 m. This model preserves signed lengths and offsets.
The optional light-year uses a 365.25-day Julian year and the exact vacuum speed of light. Output rounding does not establish measurement precision.
The optional Earth-radius scale uses 6,371,000 m and the solar-radius scale uses 695,700,000 m as reference values. They are scale conventions here, not live measurements of those bodies.

No. Micron is another name for the micrometer, symbol µm.

Exactly 1,000. A measurement of 250 µm is 0.25 mm.

The light-year uses exactly 299792458 m/s times a 31557600-second Julian year, replacing the rounded reference factor.