Convert micrometers to millimeters
1 µm = 0.001 mm — exactly. Both units are defined against the SI, so this factor is a fraction, not an approximation.
0.001mm
As a fraction: 1/1000
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1 µm = 0.001 mm
Show this value in all 50 length units
- Gigameters Gm 1e-15
- Megameters Mm 1e-12
- Kilometers km 1e-9
- Hectometers hm 1e-8
- Decameters dam 0.000 000 1
- Meters m 0.000 001
- Decimeters dm 0.000 01
- Centimeters cm 0.0001
- Millimeters mm 0.001
- Micrometers µm 1
- Nanometers nm 1000
- Picometers pm 1 000 000
- Femtometers fm 1 000 000 000
- Inches in 0.000 039 370 078 740 2
- Feet ft 0.000 003 280 839 895 01
- Yards yd 0.000 001 093 613 298 34
- Miles mi 6.21371192237e-10
- Nautical miles nmi 5.39956803456e-10
- Thous thou 0.039 370 078 740 2
- Hands hh 0.000 009 842 519 685 04
- Links li 0.000 004 970 969 537 9
- Spans span 0.000 004 374 453 193 35
- Cubits cubit 0.000 002 187 226 596 68
- Ells ell 0.000 000 874 890 638 67
- Fathoms ftm 0.000 000 546 806 649 169
- Rods rd 0.000 000 198 838 781 516
- Chains ch 4.9709695379e-8
- Furlongs fur 4.9709695379e-9
- Leagues lea 2.07123730746e-10
- Barleycorns barleycorn 0.000 118 110 236 22
- US survey feet ft (US) 0.000 003 280 833 333 33
- US survey miles mi (US) 6.21369949495e-10
- Ångströms Å 10 000
- Microns µ 1
- Bohr radiuss a₀ 18 897.261 259 1
- Planck lengths ℓₚ 6.18714249917e+28
- Astronomical units au 6.68458712227e-18
- Light-years ly 1.05700083402e-22
- Light-seconds ls 3.33564095198e-15
- Light-minutes lmin 5.55940158664e-17
- Parsecs pc 3.24077928944e-23
- Kiloparsecs kpc 3.24077928944e-26
- Megaparsecs Mpc 3.24077928944e-29
- Solar radiuss R☉ 1.43740117867e-15
- Earth radiuss R🜨 1.56961230576e-13
- Point (DTP)s pt 0.002 834 645 669 29
- Picas pc 0.000 236 220 472 441
- Scandinavian miles mil 1e-10
- Versts вер 9.37382827147e-10
- Lis 里 2e-9
Every row is Micrometer (µm) converted through the meter, in exact rational arithmetic.
How to convert micrometers to millimeters
Multiply the number of micrometers by 0.001 to get millimeters.
The exact factor is 0.001 — as a fraction, 1/1000.
Micrometer to Millimeter conversion table
| Micrometers (µm) | Millimeters (mm) |
|---|---|
| 1 µm | 0.001 |
| 2 µm | 0.002 |
| 3 µm | 0.003 |
| 5 µm | 0.005 |
| 10 µm | 0.01 |
| 20 µm | 0.02 |
| 25 µm | 0.025 |
| 50 µm | 0.05 |
| 100 µm | 0.1 |
| 250 µm | 0.25 |
| 500 µm | 0.5 |
| 1000 µm | 1 |
Millimeter to Micrometer conversion table
| Millimeters (mm) | Micrometers (µm) |
|---|---|
| 1 mm | 1000 |
| 2 mm | 2000 |
| 3 mm | 3000 |
| 5 mm | 5000 |
| 10 mm | 10 000 |
| 20 mm | 20 000 |
| 25 mm | 25 000 |
| 50 mm | 50 000 |
| 100 mm | 100 000 |
| 250 mm | 250 000 |
| 500 mm | 500 000 |
| 1000 mm | 1 000 000 |
Frequently asked
How many millimeters are in a micrometer?
One micrometer equals 0.001 millimeters (µm → mm). That figure is exact, not rounded.
How do you convert micrometers to millimeters?
Multiply the number of micrometers by 0.001 to get millimeters.
What is 1 mm in micrometers?
One millimeter is 1000 micrometers.
What is 10 µm in mm?
10 µm = 0.01 mm.