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Sources and Accuracy
Length conversions use the metre as the reference unit. Common imperial relationships are exact where standardized, such as 1 inch = 0.0254 metre and 1 foot = 0.3048 metre.
Displayed results are rounded for readability. The calculator keeps enough precision for everyday use and switches to scientific notation for very large or very small values. Last reviewed: 2026-05-21.
About These Units
micrometer [µm]
Definition
The micrometer (µm) is a length unit used to express measurements in this converter.
History
This unit is included because it appears in practical measurement systems, technical references, product specifications, or everyday conversion needs.
Current use
Use micrometer when comparing length values, checking specifications, converting between systems, or preparing quick estimates.
centimeter [cm]
Definition
The centimeter is one hundredth of a meter and is a convenient metric unit for small everyday lengths.
History
Centimeters come from the decimal metric system, where prefixes make units scale cleanly by powers of ten.
Current use
Centimeters are common for body measurements, clothing sizes, school work, crafts, furniture, and product dimensions.