Convert Decimeter to Millimeter Online

About Decimeter to Millimeter Conversion

This converter converts Decimeter (dm) to Millimeter (mm). One Decimeter (dm) equals 100 Millimeter (mm).

Formula:

1 Decimeter (dm) = 100 Millimeter (mm)

Example:

1 dm = 100 mm
2 dm = 200 mm

Decimeter (dm) to Millimeter (mm) Conversion

Decimeter to Millimeter conversion explained with exact factors, step-by-step examples, and situations where this conversion is commonly used.

Conversion Formula

Millimeter = Decimeter × 100

To convert Decimeter (dm) to Millimeter (mm), multiply the value by 100. This factor is obtained by comparing their exact meter definitions.

Worked Example

Convert 1 dm to mm.

  • Step 1: Write the formula: mm = dm × 100
  • Step 2: Substitute: 1 × 100
  • Step 3: Result: 100 mm
So, 1 dm = 100 mm.

About the Units

Decimeter (dm)

One Decimeter (dm) equals 100 Millimeter (mm)

A widely used unit across scientific, engineering, and measurement contexts.

Millimeter (mm)

One Millimeter (mm) equals 0.01 Decimeter (dm)

Common in precision engineering and laboratory measurement.

Where This Conversion Is Used

  • Converting values from Decimeter to Millimeter for engineering or scientific workflows.
  • Used when normalizing mixed-unit datasets requiring consistent Millimeter representation.
  • Applied when comparing different measurement systems across tools and documents.

Frequently Asked Questions

How many Millimeter (mm) are in 1 Decimeter (dm)?

1 dm = 100 mm.

What is the formula for converting Decimeter (dm) to Millimeter (mm)?

Multiply the dm value by 100.

Can I reverse the conversion?

Yes. 1 mm = 0.01 dm.

Conclusion

By applying the conversion factor shown above, you can reliably convert Decimeter (dm) to Millimeter (mm) for use in scientific analysis, engineering calculations, academic work, or daily measurements.

Quick Links for Unit Converters

Convert Decimeter to Other Units

Decimeter to Inch

1 dm = 3.9370078740157486 in

1 Decimeter (dm) = 3.9370078740157486 Inches (in)

1 decimeter equals 3.9370078740157486 inches.

Decimeter to Foot

1 dm = 0.32808398950131235 ft

1 Decimeter (dm) = 0.32808398950131235 Foot (ft)

1 decimeter equals 0.32808398950131235 foot.

Decimeter to Feet

1 dm = 0.32808398950131235 ft

1 Decimeter (dm) = 0.32808398950131235 Feet (ft)

1 decimeter equals 0.32808398950131235 feet.

Decimeter to Centimeter

1 dm = 10 cm

1 Decimeter (dm) = 10 Centimeters (cm)

1 decimeter equals 10 centimeters.

Decimeter to Meter

1 dm = 0.1 m

1 Decimeter (dm) = 0.1 Meter (m)

1 decimeter equals 0.1 meter.

Decimeter to Kilometer

1 dm = 0.0001 km

1 Decimeter (dm) = 0.0001 Kilometer (km)

1 decimeter equals 0.0001 kilometer.

Decimeter to Millimeter

1 dm = 100 mm

1 Decimeter (dm) = 100 Millimeters (mm)

1 decimeter equals 100 millimeters.

Decimeter to Yard

1 dm = 0.10936132983377078 yd

1 Decimeter (dm) = 0.10936132983377078 Yard (yd)

1 decimeter equals 0.10936132983377078 yard.

Decimeter to Yoctometer

1 dm = 1.0000000000000001e+23 ym

1 Decimeter (dm) = 1.0000000000000001e+23 Yoctometers (ym)

1 decimeter equals 1.0000000000000001e+23 yoctometers.

Decimeter to Zeptometer

1 dm = 100000000000000020000 zm

1 Decimeter (dm) = 100000000000000020000 Zeptometers (zm)

1 decimeter equals 100000000000000020000 zeptometers.

Decimeter to Attometer

1 dm = 100000000000000000 am

1 Decimeter (dm) = 100000000000000000 Attometers (am)

1 decimeter equals 100000000000000000 attometers.

Decimeter to Femtometer

1 dm = 100000000000000 fm

1 Decimeter (dm) = 100000000000000 Femtometers (fm)

1 decimeter equals 100000000000000 femtometers.

Decimeter to Picometer

1 dm = 100000000000 pm

1 Decimeter (dm) = 100000000000 Picometers (pm)

1 decimeter equals 100000000000 picometers.

Decimeter to Nanometer

1 dm = 100000000 nm

1 Decimeter (dm) = 100000000 Nanometers (nm)

1 decimeter equals 100000000 nanometers.

Decimeter to Micrometer

1 dm = 100000.00000000001 µm

1 Decimeter (dm) = 100000.00000000001 Micrometers (µm)

1 decimeter equals 100000.00000000001 micrometers.

Decimeter to Decameter

1 dm = 0.01 dam

1 Decimeter (dm) = 0.01 Decameter (dam)

1 decimeter equals 0.01 decameter.

Decimeter to Hectometer

1 dm = 0.001 hm

1 Decimeter (dm) = 0.001 Hectometer (hm)

1 decimeter equals 0.001 hectometer.

Decimeter to Megameter

1 dm = 1.0000000000000001e-7 Mm

1 Decimeter (dm) = 1.0000000000000001e-7 Megameter (Mm)

1 decimeter equals 1.0000000000000001e-7 megameter.

Decimeter to Gigameter

1 dm = 1e-10 Gm

1 Decimeter (dm) = 1e-10 Gigameter (Gm)

1 decimeter equals 1e-10 gigameter.

Decimeter to Terameter

1 dm = 1e-13 Tm

1 Decimeter (dm) = 1e-13 Terameter (Tm)

1 decimeter equals 1e-13 terameter.

Decimeter to Petameter

1 dm = 1.0000000000000001e-16 Pm

1 Decimeter (dm) = 1.0000000000000001e-16 Petameter (Pm)

1 decimeter equals 1.0000000000000001e-16 petameter.

Decimeter to Exameter

1 dm = 1.0000000000000001e-19 Em

1 Decimeter (dm) = 1.0000000000000001e-19 Exameter (Em)

1 decimeter equals 1.0000000000000001e-19 exameter.

Decimeter to Zettameter

1 dm = 1e-22 Zm

1 Decimeter (dm) = 1e-22 Zettameter (Zm)

1 decimeter equals 1e-22 zettameter.

Decimeter to Yottameter

1 dm = 1e-25 Ym

1 Decimeter (dm) = 1e-25 Yottameter (Ym)

1 decimeter equals 1e-25 yottameter.

Decimeter to Cubit

1 dm = 0.21872265966754156 cubit

1 Decimeter (dm) = 0.21872265966754156 Cubit (cubit)

1 decimeter equals 0.21872265966754156 cubit.

Decimeter to Span

1 dm = 0.4374453193350831 span

1 Decimeter (dm) = 0.4374453193350831 Span (span)

1 decimeter equals 0.4374453193350831 span.

Decimeter to Hand

1 dm = 0.9842519685039371 hh

1 Decimeter (dm) = 0.9842519685039371 Hand (hh)

1 decimeter equals 0.9842519685039371 hand.

Decimeter to Palm

1 dm = 1.3123359580052494 palm

1 Decimeter (dm) = 1.3123359580052494 Palms (palm)

1 decimeter equals 1.3123359580052494 palms.

Decimeter to Digit

1 dm = 5.2493438320209975 digit

1 Decimeter (dm) = 5.2493438320209975 Digits (digit)

1 decimeter equals 5.2493438320209975 digits.

Decimeter to Link

1 dm = 0.4970969537898672 link

1 Decimeter (dm) = 0.4970969537898672 Link (link)

1 decimeter equals 0.4970969537898672 link.

Decimeter to Ell

1 dm = 0.08748906386701663 ell

1 Decimeter (dm) = 0.08748906386701663 Ell (ell)

1 decimeter equals 0.08748906386701663 ell.

Decimeter to Barleycorn

1 dm = 11.80637544273908 barleycorn

1 Decimeter (dm) = 11.80637544273908 Barleycorns (barleycorn)

1 decimeter equals 11.80637544273908 barleycorns.

Decimeter to Astronomical Unit

1 dm = 6.684587122268446e-13 AU

1 Decimeter (dm) = 6.684587122268446e-13 Astronomical Unit (AU)

1 decimeter equals 6.684587122268446e-13 Astronomicalunit.

Decimeter to Light-Second

1 dm = 3.3356409519815207e-10 ls

1 Decimeter (dm) = 3.3356409519815207e-10 Light-Second (ls)

1 decimeter equals 3.3356409519815207e-10 Light-Second.

Decimeter to Light-Minute

1 dm = 5.559401586635868e-12 lm

1 Decimeter (dm) = 5.559401586635868e-12 Light-Minute (lm)

1 decimeter equals 5.559401586635868e-12 Light-Minute.

Decimeter to Light-Hour

1 dm = 9.265669309342727e-14 lh

1 Decimeter (dm) = 9.265669309342727e-14 Light-Hour (lh)

1 decimeter equals 9.265669309342727e-14 Light-Hour.

Decimeter to Light-Day

1 dm = 3.860695546453768e-15 ld

1 Decimeter (dm) = 3.860695546453768e-15 Light-Day (ld)

1 decimeter equals 3.860695546453768e-15 Light-Day.

Decimeter to Light-Year

1 dm = 1.0570008340246155e-17 ly

1 Decimeter (dm) = 1.0570008340246155e-17 Light-Year (ly)

1 decimeter equals 1.0570008340246155e-17 Light-Year.

Decimeter to Parsec

1 dm = 3.2407792894443624e-18 pc

1 Decimeter (dm) = 3.2407792894443624e-18 Parsec (pc)

1 decimeter equals 3.2407792894443624e-18 Parsec.

Decimeter to Kiloparsec

1 dm = 3.2407792894443623e-21 kpc

1 Decimeter (dm) = 3.2407792894443623e-21 Kiloparsec (kpc)

1 decimeter equals 3.2407792894443623e-21 Kiloparsec.

Decimeter to Megaparsec

1 dm = 3.2407792894443624e-24 Mpc

1 Decimeter (dm) = 3.2407792894443624e-24 Megaparsec (Mpc)

1 decimeter equals 3.2407792894443624e-24 Megaparsec.

Decimeter to Gigaparsec

1 dm = 3.240779289444363e-27 Gpc

1 Decimeter (dm) = 3.240779289444363e-27 Gigaparsec (Gpc)

1 decimeter equals 3.240779289444363e-27 Gigaparsec.

Decimeter to Nautical Mile

1 dm = 0.00005399568034557236 NM

1 Decimeter (dm) = 0.00005399568034557236 Nautical Mile (NM)

1 decimeter equals 0.00005399568034557236 Nautical Mile.

Decimeter to Fathom

1 dm = 0.05468066491688539 ftm

1 Decimeter (dm) = 0.05468066491688539 Fathom (ftm)

1 decimeter equals 0.05468066491688539 fathom.

Decimeter to Cable Length

1 dm = 0.0004556722076407116 cable

1 Decimeter (dm) = 0.0004556722076407116 Cable Length (cable)

1 decimeter equals 0.0004556722076407116 Cable Length .

Decimeter to Nautical League

1 dm = 0.000017998560115190787 NL

1 Decimeter (dm) = 0.000017998560115190787 Nautical League (NL)

1 decimeter equals 0.000017998560115190787 Nautical League.

Decimeter to Thou

1 dm = 3937.0078740157483 mil

1 Decimeter (dm) = 3937.0078740157483 Thous (mil)

1 decimeter equals 3937.0078740157483 thous.

Decimeter to Rod

1 dm = 0.019883878151594685 rd

1 Decimeter (dm) = 0.019883878151594685 Rod (rd)

1 decimeter equals 0.019883878151594685 rod.

Decimeter to Chain

1 dm = 0.004970969537898671 ch

1 Decimeter (dm) = 0.004970969537898671 Chain (ch)

1 decimeter equals 0.004970969537898671 chain.

Decimeter to Furlong

1 dm = 0.0004970969537898672 fur

1 Decimeter (dm) = 0.0004970969537898672 Furlong (fur)

1 decimeter equals 0.0004970969537898672 furlong.

Decimeter to Mile

1 dm = 0.0000621371192237334 mi

1 Decimeter (dm) = 0.0000621371192237334 Mile (mi)

1 decimeter equals 0.0000621371192237334 mile.

Decimeter to League

1 dm = 0.0000207123730745778 lea

1 Decimeter (dm) = 0.0000207123730745778 League (lea)

1 decimeter equals 0.0000207123730745778 league.

Convert Millimeter to Other Units

Millimeter to Inch

1 mm = 0.03937007874015748 in

1 Millimeter (mm) = 0.03937007874015748 Inch (in)

1 millimeter equals 0.03937007874015748 inch.

Millimeter to Foot

1 mm = 0.0032808398950131233 ft

1 Millimeter (mm) = 0.0032808398950131233 Foot (ft)

1 millimeter equals 0.0032808398950131233 foot.

Millimeter to Feet

1 mm = 0.0032808398950131233 ft

1 Millimeter (mm) = 0.0032808398950131233 Feet (ft)

1 millimeter equals 0.0032808398950131233 feet.

Millimeter to Centimeter

1 mm = 0.1 cm

1 Millimeter (mm) = 0.1 Centimeter (cm)

1 millimeter equals 0.1 centimeter.

Millimeter to Meter

1 mm = 0.001 m

1 Millimeter (mm) = 0.001 Meter (m)

1 millimeter equals 0.001 meter.

Millimeter to Kilometer

1 mm = 0.000001 km

1 Millimeter (mm) = 0.000001 Kilometer (km)

1 millimeter equals 0.000001 kilometer.

Millimeter to Yard

1 mm = 0.0010936132983377078 yd

1 Millimeter (mm) = 0.0010936132983377078 Yard (yd)

1 millimeter equals 0.0010936132983377078 yard.

Millimeter to Yoctometer

1 mm = 1.0000000000000001e+21 ym

1 Millimeter (mm) = 1.0000000000000001e+21 Yoctometers (ym)

1 millimeter equals 1.0000000000000001e+21 yoctometers.

Millimeter to Zeptometer

1 mm = 1000000000000000100 zm

1 Millimeter (mm) = 1000000000000000100 Zeptometers (zm)

1 millimeter equals 1000000000000000100 zeptometers.

Millimeter to Attometer

1 mm = 1000000000000000 am

1 Millimeter (mm) = 1000000000000000 Attometers (am)

1 millimeter equals 1000000000000000 attometers.

Millimeter to Femtometer

1 mm = 1000000000000 fm

1 Millimeter (mm) = 1000000000000 Femtometers (fm)

1 millimeter equals 1000000000000 femtometers.

Millimeter to Picometer

1 mm = 1000000000 pm

1 Millimeter (mm) = 1000000000 Picometers (pm)

1 millimeter equals 1000000000 picometers.

Millimeter to Nanometer

1 mm = 1000000 nm

1 Millimeter (mm) = 1000000 Nanometers (nm)

1 millimeter equals 1000000 nanometers.

Millimeter to Micrometer

1 mm = 1000.0000000000001 µm

1 Millimeter (mm) = 1000.0000000000001 Micrometers (µm)

1 millimeter equals 1000.0000000000001 micrometers.

Millimeter to Decimeter

1 mm = 0.01 dm

1 Millimeter (mm) = 0.01 Decimeter (dm)

1 millimeter equals 0.01 decimeter.

Millimeter to Decameter

1 mm = 0.0001 dam

1 Millimeter (mm) = 0.0001 Decameter (dam)

1 millimeter equals 0.0001 decameter.

Millimeter to Hectometer

1 mm = 0.00001 hm

1 Millimeter (mm) = 0.00001 Hectometer (hm)

1 millimeter equals 0.00001 hectometer.

Millimeter to Megameter

1 mm = 1e-9 Mm

1 Millimeter (mm) = 1e-9 Megameter (Mm)

1 millimeter equals 1e-9 megameter.

Millimeter to Gigameter

1 mm = 1e-12 Gm

1 Millimeter (mm) = 1e-12 Gigameter (Gm)

1 millimeter equals 1e-12 gigameter.

Millimeter to Terameter

1 mm = 1e-15 Tm

1 Millimeter (mm) = 1e-15 Terameter (Tm)

1 millimeter equals 1e-15 terameter.

Millimeter to Petameter

1 mm = 1e-18 Pm

1 Millimeter (mm) = 1e-18 Petameter (Pm)

1 millimeter equals 1e-18 petameter.

Millimeter to Exameter

1 mm = 1.0000000000000001e-21 Em

1 Millimeter (mm) = 1.0000000000000001e-21 Exameter (Em)

1 millimeter equals 1.0000000000000001e-21 exameter.

Millimeter to Zettameter

1 mm = 1.0000000000000001e-24 Zm

1 Millimeter (mm) = 1.0000000000000001e-24 Zettameter (Zm)

1 millimeter equals 1.0000000000000001e-24 zettameter.

Millimeter to Yottameter

1 mm = 1e-27 Ym

1 Millimeter (mm) = 1e-27 Yottameter (Ym)

1 millimeter equals 1e-27 yottameter.

Millimeter to Cubit

1 mm = 0.0021872265966754157 cubit

1 Millimeter (mm) = 0.0021872265966754157 Cubit (cubit)

1 millimeter equals 0.0021872265966754157 cubit.

Millimeter to Span

1 mm = 0.004374453193350831 span

1 Millimeter (mm) = 0.004374453193350831 Span (span)

1 millimeter equals 0.004374453193350831 span.

Millimeter to Hand

1 mm = 0.00984251968503937 hh

1 Millimeter (mm) = 0.00984251968503937 Hand (hh)

1 millimeter equals 0.00984251968503937 hand.

Millimeter to Palm

1 mm = 0.013123359580052493 palm

1 Millimeter (mm) = 0.013123359580052493 Palm (palm)

1 millimeter equals 0.013123359580052493 palm.

Millimeter to Digit

1 mm = 0.05249343832020997 digit

1 Millimeter (mm) = 0.05249343832020997 Digit (digit)

1 millimeter equals 0.05249343832020997 digit.

Millimeter to Link

1 mm = 0.004970969537898671 link

1 Millimeter (mm) = 0.004970969537898671 Link (link)

1 millimeter equals 0.004970969537898671 link.

Millimeter to Ell

1 mm = 0.0008748906386701663 ell

1 Millimeter (mm) = 0.0008748906386701663 Ell (ell)

1 millimeter equals 0.0008748906386701663 ell.

Millimeter to Barleycorn

1 mm = 0.1180637544273908 barleycorn

1 Millimeter (mm) = 0.1180637544273908 Barleycorn (barleycorn)

1 millimeter equals 0.1180637544273908 barleycorn.

Millimeter to Astronomical Unit

1 mm = 6.684587122268446e-15 AU

1 Millimeter (mm) = 6.684587122268446e-15 Astronomical Unit (AU)

1 millimeter equals 6.684587122268446e-15 Astronomicalunit.

Millimeter to Light-Second

1 mm = 3.3356409519815207e-12 ls

1 Millimeter (mm) = 3.3356409519815207e-12 Light-Second (ls)

1 millimeter equals 3.3356409519815207e-12 Light-Second.

Millimeter to Light-Minute

1 mm = 5.559401586635868e-14 lm

1 Millimeter (mm) = 5.559401586635868e-14 Light-Minute (lm)

1 millimeter equals 5.559401586635868e-14 Light-Minute.

Millimeter to Light-Hour

1 mm = 9.265669309342728e-16 lh

1 Millimeter (mm) = 9.265669309342728e-16 Light-Hour (lh)

1 millimeter equals 9.265669309342728e-16 Light-Hour.

Millimeter to Light-Day

1 mm = 3.860695546453768e-17 ld

1 Millimeter (mm) = 3.860695546453768e-17 Light-Day (ld)

1 millimeter equals 3.860695546453768e-17 Light-Day.

Millimeter to Light-Year

1 mm = 1.0570008340246155e-19 ly

1 Millimeter (mm) = 1.0570008340246155e-19 Light-Year (ly)

1 millimeter equals 1.0570008340246155e-19 Light-Year.

Millimeter to Parsec

1 mm = 3.2407792894443624e-20 pc

1 Millimeter (mm) = 3.2407792894443624e-20 Parsec (pc)

1 millimeter equals 3.2407792894443624e-20 Parsec.

Millimeter to Kiloparsec

1 mm = 3.2407792894443625e-23 kpc

1 Millimeter (mm) = 3.2407792894443625e-23 Kiloparsec (kpc)

1 millimeter equals 3.2407792894443625e-23 Kiloparsec.

Millimeter to Megaparsec

1 mm = 3.240779289444362e-26 Mpc

1 Millimeter (mm) = 3.240779289444362e-26 Megaparsec (Mpc)

1 millimeter equals 3.240779289444362e-26 Megaparsec.

Millimeter to Gigaparsec

1 mm = 3.2407792894443624e-29 Gpc

1 Millimeter (mm) = 3.2407792894443624e-29 Gigaparsec (Gpc)

1 millimeter equals 3.2407792894443624e-29 Gigaparsec.

Millimeter to Nautical Mile

1 mm = 5.399568034557235e-7 NM

1 Millimeter (mm) = 5.399568034557235e-7 Nautical Mile (NM)

1 millimeter equals 5.399568034557235e-7 Nautical Mile.

Millimeter to Fathom

1 mm = 0.0005468066491688539 ftm

1 Millimeter (mm) = 0.0005468066491688539 Fathom (ftm)

1 millimeter equals 0.0005468066491688539 fathom.

Millimeter to Cable Length

1 mm = 0.000004556722076407116 cable

1 Millimeter (mm) = 0.000004556722076407116 Cable Length (cable)

1 millimeter equals 0.000004556722076407116 Cable Length .

Millimeter to Nautical League

1 mm = 1.7998560115190786e-7 NL

1 Millimeter (mm) = 1.7998560115190786e-7 Nautical League (NL)

1 millimeter equals 1.7998560115190786e-7 Nautical League.

Millimeter to Thou

1 mm = 39.37007874015748 mil

1 Millimeter (mm) = 39.37007874015748 Thous (mil)

1 millimeter equals 39.37007874015748 thous.

Millimeter to Rod

1 mm = 0.00019883878151594686 rd

1 Millimeter (mm) = 0.00019883878151594686 Rod (rd)

1 millimeter equals 0.00019883878151594686 rod.

Millimeter to Chain

1 mm = 0.000049709695378986714 ch

1 Millimeter (mm) = 0.000049709695378986714 Chain (ch)

1 millimeter equals 0.000049709695378986714 chain.

Millimeter to Furlong

1 mm = 0.000004970969537898672 fur

1 Millimeter (mm) = 0.000004970969537898672 Furlong (fur)

1 millimeter equals 0.000004970969537898672 furlong.

Millimeter to Mile

1 mm = 6.21371192237334e-7 mi

1 Millimeter (mm) = 6.21371192237334e-7 Mile (mi)

1 millimeter equals 6.21371192237334e-7 mile.

Millimeter to League

1 mm = 2.07123730745778e-7 lea

1 Millimeter (mm) = 2.07123730745778e-7 League (lea)

1 millimeter equals 2.07123730745778e-7 league.