# Convert millimeters to microns

Enter the number of millimeters you want to convert to microns in the text box below. The conversion to length in microns will update as you type.

millimeters (mm)
1 millimeters = 1,000 microns

## Precise decimal and fraction answers

The conversion in microns rounded to six significant decimal places is 1 mm = 1,000.000000 µ. The precise fraction answer is 1,000 0/1 µ.

### Decimal Precision

Conversion from one to ten decimal places

• 1 mm = 1,000.0 µ
• 1 mm = 1,000.00 µ
• 1 mm = 1,000.000 µ
• 1 mm = 1,000.0000 µ
• 1 mm = 1,000.00000 µ
• 1 mm = 1,000.000000 µ
• 1 mm = 1,000.0000000 µ
• 1 mm = 1,000.00000000 µ
• 1 mm = 1,000.000000000 µ
• 1 mm = 1,000.0000000000 µ

## How many microns are in a millimeter?

There are 1,000 microns in one millimeter. A millimeter is 1,000 times longer than a micron. A micron is 0.10% of a millimeter

## Millimeters to microns conversion factor and formulas

Formula

The conversion factor between millimeters and microns is 1,000. This represents the ratio of microns per one millimeter. To calculate the value in microns, we can either multiply by the conversion factor or divide by its inverse.

### Multiplication

To convert from millimeters to microns, multiply millimeters by 1,000.
The formula is expressed as:
mm × 1,000 = µ

### Division

Alternatively we can divide by the inverse conversion factor to get the same result.
The inverse of 1,000 is 1/1,000 or 0.001. To convert from millimeters to microns, divide millimeters by 0.001.
The formula is expressed as:
mm ÷ 0.001 = µ

A conversion from millimeters to microns are units within in the metric (SI) or SI compatible systems.

SI Unit

Within the SI (metric) system of measurement, the millimeter is officially defined as one thousandth (1/1,000) of a meter. It is commonly used when measuring very short lengths. Internationally it is spelled 'millimetre' whereas the U.S. spells it 'millimeter'. The symbol for millimeters is mm.

SI Unit

The micrometer is a very small unit of length within the SI (metric) system. It is officially defined as one millionth (1/1,000,000) of a meter or one thousandth (1/1,000) of a millimeter. The micrometer is also commonly referred to as a micron. It is commonly used when measuring microscopic sizes like bacteria or biological cells. Internationally it is spelled 'micrometre' whereas the U.S. spells it 'micrometer'. The symbol for a micrometer is µ.

## Reverse this conversion

Convert from microns to millimeters instead.

## 1 millimeters to other length units

### Metric

• 1 mm = 1×10-6 km
• 1 mm = 0.001 m
• 1 mm = 0.01 dm
• 1 mm = 0.1 cm
• 1 mm = 1 mm
• 1 mm = 1,000 µ
• 1 mm = 1,000,000 nm

### Imperial/U.S.

• 1 mm = 6.214×10-7 mi
• 1 mm = 0.001 yd
• 1 mm = 0.003 ft
• 1 mm = 0.039 in

## References and Citations

1. International Bureau of Weights and Measures (BIPM) The International System of Units (SI)

## Millimeters to microns conversion table

mm µ
1 mm 1,000 µ
2 mm 2,000 µ
3 mm 3,000 µ
4 mm 4,000 µ
5 mm 5,000 µ
6 mm 6,000 µ
7 mm 7,000 µ
8 mm 8,000 µ
9 mm 9,000 µ
10 mm 10,000 µ
mm µ
20 mm 20,000 µ
30 mm 30,000 µ
40 mm 40,000 µ
50 mm 50,000 µ
60 mm 60,000 µ
70 mm 70,000 µ
80 mm 80,000 µ
90 mm 90,000 µ
100 mm 100,000 µ
1,000 mm 1,000,000 µ