Metrology toolkit · 01

Precision unit conversion, built for the workbench.

A focused engineering converter with SI-referenced calculations, explicit scope notes, and display precision you control.

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BIPM + NIST validated
Converted result LIVE
25.4mm
1 in = 25.4 mm
Display precision
Internal referencemetre (m)
MethodCanonical-unit conversion
Scope note

The international inch is defined as exactly 25.4 millimetres.

Validation basis

SI prefixes and the exact international inch (0.0254 m); foot, yard, and mil are derived from that definition.

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