Millimeters to Inches Converter

1 mm = 0.03937007874 in. Type any value below for the exact inches figure.

mm
0.0393700787402in

1 mm = 0.0393700787402 in

Conversion summary

1 mm = 0.03937007874 in

Formula
Inch = Millimeter ÷ 25.4
Category
Length
Units
mm → in

1 mm in other units

Values update with the converter above. Select a row to open that conversion's detailed page.

Metric

US / Imperial

  • Foot0.00328084 ft
  • Inch0.03937008 in
  • Yard0.001093613 yd
  • Mile0.0000006213712 mi
  • Furlong0.00000497097 fur
  • Nautical mile0.0000005399568 nmi
  • Fathom0.0005468066 ftm

Traditional and regional

  • Scandinavian mile0.0000001 mil
  • Arshin0.001470588 arshin
  • Endaze0.001538462 endaze
  • Byzantine Foot0.00317662 pus
  • Byzantine Fathom0.0005294367 orgyia
  • Cig0.003003003 cig

Scientific

  • Astronomical Unit6.68459E-15 AU
  • Light-year1.057E-19 ly
  • Parsec3.24078E-20 pc
  • Angstrom10,000,000 Å

How do you convert millimeters to inches?

To convert millimeters to inches, divide the number of millimeters by 25.4. 1 mm = 0.0393701 in.

Conversion formula

Inch = Millimeter ÷ 25.4

Millimeters to inches conversion table

Millimeters (mm)Inches (in)
0.66 mm0.0259843 in
1 mm0.0393701 in
5 mm0.19685 in
10 mm0.393701 in
25.4 mm1 in
50 mm1.9685 in

What is Millimeter?

The millimeter is a unit of length equal to one thousandth of a meter. It is widely used in technical and precision work.

Short history of Millimeter

The millimeter became especially important as manufacturing and engineering required tighter tolerances and repeatable precision.

Open the Millimeter unit guide

What is Inch?

The inch is a short unit of length used in imperial and United States customary systems. One inch is exactly 2.54 centimeters.

Short history of Inch

The inch developed from older local measures tied to the body. The modern international inch has been fixed at exactly 25.4 millimeters since 1959.

Open the Inch unit guide

Frequently asked questions

What is 1 Millimeter in Inch?

1 mm = 0.03937007874 in.

How do you convert Millimeter to Inch?

To convert millimeters to inches, divide the number of millimeters by 25.4. 1 mm = 0.0393701 in.

Frequently asked questions

How many inches are in 1 millimeter?

1 mm = 0.0393701 in.

How do you convert millimeters to inches?

To convert millimeters to inches, divide the number of millimeters by 25.4. 1 mm = 0.0393701 in.

How many millimeters are in 1 inch?

1 in = 25.4 mm.

Sources

  1. BIPM: The International System of Units (SI Brochure)
  2. NIST: SI Units – Length
  3. NIST: Guide for the Use of the International System of Units

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