EVERYDAY
Length
Distance, height, thickness and astronomical length.
Try a decimal, 1e-9, 1/3, or 5 1/2.
Result0.0393701 in1 mm = 0.0393701 in
EVERYDAY · ENGINEERING · SCIENCE
mm to in Converter
Convert millimetre (mm) to inch (in). Enter a value for an instant result, or use the examples and reverse conversion below.
520units ready to convert
HOW IT IS CALCULATED
Convert through metre
Enter a millimetre value to calculate inch with full internal precision before display rounding.
Display PrecisionAuto · 6 significant digits
Auto trims unnecessary zeroes and uses scientific notation for extreme magnitudes. Use Digits to set the display precision; calculations retain full precision.
QUICK REFERENCE
All units in this quantity
| Unit | Symbol | Converted value |
|---|---|---|
| quectometrefrom mm | qm | 1e27 |
| rontometrefrom mm | rm | 1e24 |
| yoctometrefrom mm | ym | 1e21 |
| zeptometrefrom mm | zm | 1e18 |
| attometrefrom mm | am | 1e15 |
| femtometrefrom mm | fm | 1000000000000 |
| picometrefrom mm | pm | 1000000000 |
| nanometrefrom mm | nm | 1000000 |
| ångströmfrom mm | Å | 10000000 |
| micrometrefrom mm | µm | 1000 |
| millimetrefrom mm | mm | 1 |
| centimetrefrom mm | cm | 0.1 |
| decimetrefrom mm | dm | 0.01 |
| metrefrom mm | m | 0.001 |
| decametrefrom mm | dam | 0.0001 |
| hectometrefrom mm | hm | 0.00001 |
| kilometrefrom mm | km | 0.000001 |
| megametrefrom mm | Mm | 0.000000001 |
| gigametrefrom mm | Gm | 1e-12 |
| terametrefrom mm | Tm | 1e-15 |
| petametrefrom mm | Pm | 1e-18 |
| exametrefrom mm | Em | 1e-21 |
| zettametrefrom mm | Zm | 1e-24 |
| yottametrefrom mm | Ym | 1e-27 |
| ronnametrefrom mm | Rm | 1e-30 |
| quettametrefrom mm | Qm | 1e-33 |
| thou / milfrom mm | mil | 39.3701 |
| inchfrom mm | in | 0.0393701 |
| footfrom mm | ft | 0.00328084 |
| yardfrom mm | yd | 0.00109361 |
| chainfrom mm | ch | 0.0000497097 |
| furlongfrom mm | fur | 0.00000497097 |
| international milefrom mm | mi | 0.000000621371 |
| nautical milefrom mm | nmi | 0.000000539957 |
| U.S. survey footfrom mm | ftUS | 0.00328083 |
| typographic pointfrom mm | pt | 2.83465 |
| astronomical unitfrom mm | au | 6.68459e-15 |
| light-secondfrom mm | ls | 3.33564e-12 |
| light-yearfrom mm | ly | 1.057e-19 |
| parsecfrom mm | pc | 3.24078e-20 |
SI symbols follow international notation. U.S. and Imperial measures are labelled separately where their values differ.
mm to in Conversion Reference
Millimetre (mm) and inch (in) are units of length. Use this page to convert in either direction.
Conversion Examples
| Millimetre (mm) | Inch (in) |
|---|---|
| 1 mm | 0.0393701 in |
| 5 mm | 0.19685 in |
| 10 mm | 0.393701 in |
| 100 mm | 3.93701 in |
Examples are rounded to 6 significant digits. The interactive converter retains full calculation precision; change Display Precision to see more digits.
Reverse Conversion
Related Length Conversions
mm to qm (millimetre to quectometre)mm to rm (millimetre to rontometre)mm to ym (millimetre to yoctometre)mm to zm (millimetre to zeptometre)mm to am (millimetre to attometre)mm to fm (millimetre to femtometre)mm to pm (millimetre to picometre)mm to nm (millimetre to nanometre)mm to Å (millimetre to ångström)mm to µm (millimetre to micrometre)mm to cm (millimetre to centimetre)mm to dm (millimetre to decimetre)mm to m (millimetre to metre)mm to dam (millimetre to decametre)mm to hm (millimetre to hectometre)mm to km (millimetre to kilometre)mm to Mm (millimetre to megametre)mm to Gm (millimetre to gigametre)mm to Tm (millimetre to terametre)mm to Pm (millimetre to petametre)mm to Em (millimetre to exametre)mm to Zm (millimetre to zettametre)mm to Ym (millimetre to yottametre)mm to Rm (millimetre to ronnametre)mm to Qm (millimetre to quettametre)mm to mil (millimetre to thou / mil)mm to ft (millimetre to foot)mm to yd (millimetre to yard)mm to ch (millimetre to chain)mm to fur (millimetre to furlong)mm to mi (millimetre to international mile)mm to nmi (millimetre to nautical mile)mm to ftUS (millimetre to U.S. survey foot)mm to pt (millimetre to typographic point)mm to au (millimetre to astronomical unit)mm to ls (millimetre to light-second)mm to ly (millimetre to light-year)mm to pc (millimetre to parsec)