Free Length Converter

Decimeter to millimeter.

One decimeter equals 100 millimeter. Use this converter for quick, accurate dm to mm conversions.

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Precision

Conversion formula.

1 dm = 100 mm

To convert decimeter to millimeter, multiply the value in dm by 100.

Quick examples

1 dm = 100 mm
5 dm = 500 mm
10 dm = 1000 mm
100 dm = 10000 mm

Decimeter to Millimeter conversion table.

Decimeter (dm)	Millimeter (mm)
1	100
2	200
3	300
4	400
5	500
6	600
7	700
8	800
9	900
10	1000
11	1100
12	1200
13	1300
14	1400
15	1500
16	1600
17	1700
18	1800
19	1900
20	2000

Convert the other way: Millimeter to Decimeter

Related conversions.

Millimeter to Centimeter Millimeter to Decimeter Millimeter to Meter Millimeter to Kilometer Millimeter to Micrometer Millimeter to Nanometer

More Decimeter conversions.

dm → cm dm → m dm → km dm → μm dm → nm dm → in dm → ft dm → yd

Frequently asked questions.

How many millimeter are in a decimeter?

One decimeter equals 100 millimeter (mm).

How do I convert dm to mm?

Multiply the value in dm by 100. For example, 10 dm = 1000 mm.

Is this conversion exact?

Yes. This converter uses the internationally defined factor: 1 dm = 100 mm.