Length Conversion

Convert between metric and imperial length units. Start with mm to inches — decimal inches, nearest 1/64 fractions, charts, and shop-floor specification checks — or use the general converter here for every other direction.

Length converter

Same multi-unit tool as the homepage: mm, cm, m, km, inches, feet, yards, and miles. Defaults to millimeters → inches.

1 in = 25.4 mm

  • Primary hub mm to inches

    Primary hub: formula, bidirectional converter, 0–100 mm chart with nearest 1/64, and “how far off” specification checks.

  • Shop sizes Drill bits & sockets

    Scene decision table — common metric bit/socket sizes with decimal inches, nearest 1/64, and error in millimeters.

  • Hub cm to inches

    Full hub: formula, bidirectional converter, 0–100 cm chart with nearest 1/64, height in feet + inches, and everyday ISO sizes.

Length conversion directions

Common conversion directions. Dedicated hubs open their own pages; other pairs use the converter on this page.

  • mm to inches Hub

    Full hub with fraction inches, chart, and PAA-style “is it equal?” answers.

  • cm to inches Hub

    Full hub with decimal, nearest 1/64, feet + inches, charts, height context, and published cm values.

  • inches to cm Via converter

    Use the length converter on this page (in → cm).

  • cm to feet Via converter

    Pick cm and ft in the converter on this page.

  • meters to feet Via converter

    Use the general converter on this page (m ↔ ft).

  • km to miles Via converter

    Use the converter on this page (km ↔ mi).

  • inches to mm Via converter

    Use the converter on this page (in → mm).

  • feet to inches Via converter

    Use the converter on this page (ft ↔ in).

Popular mm to inches values

Common millimeter sizes with dedicated pages. Each reuses the shared conversion engine.

More on Length Tools