Micrometres to millimetres converter

Convert micrometres (µm) to millimetres (mm).

Length converter

Instant conversion

Edit either value. Decimals and scientific notation supported.

From value

µm

Measurement format

From unit

To value

Measurement format

To unit

CONVERSION

1 µm ≈ 0.001 mm

Display precision

Precision changes displayed rounding, not calculation accuracy.

FORMULAmm = µm ÷ 1000

FORMULA & EXAMPLES

How to convert Micrometres to millimetres

mm = µm ÷ 1000

Divide the µm reading by 1000.

Worked examples

1 µm ≈ 0.001 mm

1 ÷ 1000 ≈ 0.001

1000 µm ≈ 1 mm

1000 ÷ 1000 ≈ 1

Micrometres to millimetres table

Fixed reference · Micrometre to Millimetre

Reference values use this page’s named pair and default context. Calculator precision and font settings do not change this table.

Micrometre (µm)	Millimetre (mm)
0	0
0.1	0.0001
0.5	0.0005
1	0.001
2	0.002
5	0.005
10	0.01
25	0.025
50	0.05
100	0.1
1000	1

Table results use 10 significant figures; decimal formula coefficients use up to 15. Calculations use the unit definitions before rounding. Extra digits do not improve measurement accuracy.

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