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millimetre to micrometre

Live millimetre (mm) to micrometre (μm) converter. Plus a 10-value reference table and FAQs.

From mm

millimetre

To μm

micrometre

1 mm = 1,000μm

換算表

millimetreからmicrometreまでの 10 個のサンプル値。任意の値には上の換算器をお使いください。

1/1000 of a metre. Standard for small machined parts and rainfall.

1/1,000,000 of a metre. Cell biology, semiconductor manufacturing.

Both units belong to Length. Unitbox first expresses the input in the category reference unit (m), then expresses that same quantity in micrometre.

Common uses include plans, dimensions, travel distances, screens, and manufacturing specifications.

Reference value1 mm = 1,000 μm

CalculationBrowser-side, using Unitbox's shared unit data

Review noteFor safety-critical work, verify against the governing standard or instrument manual.

Unit definitions and conversion factors are maintained in the Unitbox methodology. Last reviewed with the current conversion dataset.

How do I convert millimetre to micrometre?

Multiply the millimetre value by 1,000 to get it in micrometre. For example, 10 mm = 10,000 μm.

What is 1 mm in μm?

1 mm = 1,000 μm.

What is 100 mm in μm?

100 mm = 100,000 μm.

What is the formula?

Linear: multiply by 1,000 (the unit factor ratio).

Use the reverse converter: micrometre → millimetre

Length has 13 units.

Free-form calculator that handles any pair in any category.