Convert millimeter to inch

1 mm = 0.03937007874 in

1 mm = 0.03937 in
1 mm in every length unit
Planck length6.1871e+31 lP
femtometer1,000,000,000,000 fm
picometer1,000,000,000 pm
bohr radius18,897,000 a0
angstrom10,000,000 Å
nanometer1,000,000 nm
micrometer1,000 μm
thou39.37 thou
point2.8346 pt
millimeter1 mm
pica0.23622 pc
centimeter0.1 cm
inch0.03937 in
decimeter0.01 dm
hand0.0098425 hh
link0.004971 li
foot0.0032808 ft
US survey foot0.0032808 ftUS
yard0.0010936 yd
meter0.001 m
fathom0.00054681 ftm
rod0.00019884 rd
chain0.00004971 ch
cable length0.0000053996 cb
furlong0.000004971 fur
kilometer0.000001 km
mile6.2137e-07 mi
nautical mile5.3996e-07 nmi
league2.0712e-07 lea
megameter1.0000e-09 Mm
Earth radius1.5696e-10 REarth
light-second3.3356e-12 ls
lunar distance2.6015e-12 LD
solar radius1.4374e-12 Rsun
light-minute5.5594e-14 lmin
astronomical unit6.6846e-15 AU
light-year1.0570e-19 ly
parsec3.2408e-20 pc
kiloparsec3.2408e-23 kpc
megaparsec3.2408e-26 Mpc
gigaparsec3.2408e-29 Gpc
How the conversion works

Multiply by 0.03937007874 to go from millimeter to inch, or divide by it to go back. Every conversion on this site routes through the SI value (m) rather than a table of pairwise factors, so a round-trip returns exactly what you started with.

Going the other way? inch to millimeter — 1 in = 25.4 mm.

millimeter to inch — common values
1 mm0.039370079 in
2 mm0.078740157 in
3 mm0.11811024 in
5 mm0.19685039 in
10 mm0.39370079 in
15 mm0.59055118 in
20 mm0.78740157 in
25 mm0.98425197 in
50 mm1.9685039 in
75 mm2.9527559 in
100 mm3.9370079 in
250 mm9.8425197 in
500 mm19.685039 in
1000 mm39.370079 in