millimetre mm

1/1000 of a metre. Standard for small machined parts and rainfall.

Quick convert — millimetre to popular units

Live converter, three directions. Type any value to update all three.

millimetre
metre
1 mm = 0.001m
millimetre
kilometre
1 mm = 1.00e-6km
millimetre
centimetre
1 mm = 0.1cm

Conversion table — millimetre to every Length unit

All values for 1 mm (forward) and 1 reverse unit → {symbol}.

To / From 1 mm = 1 to-unit =
metre (m) 0.001 m 1,000 mm
kilometre (km) 1.000000e-6 km 1,000,000 mm
centimetre (cm) 0.1 cm 10 mm
micrometre (μm) 1,000 μm 0.001 mm
nanometre (nm) 1,000,000 nm 1.000000e-6 mm
mile (mi) 6.213712e-7 mi 1,609,344 mm
yard (yd) 0.00109361 yd 914.4 mm
foot (ft) 0.00328084 ft 304.8 mm
inch (in) 0.03937008 in 25.4 mm
nautical mile (nmi) 5.399568e-7 nmi 1,852,000 mm
light-year (ly) 1.057001e-19 ly 9.460730e+18 mm
ångström (Å) 10,000,000 Å 1.000000e-7 mm

Frequently Asked Questions

What does mm stand for?

millimetre (mm) is a unit of Length.

How many mm are in 1 m?

1 m = 0.001 mm, so 1 mm = 1,000 m.

Is this the SI base unit?

No. millimetre is one of several units in the Length category. The SI base is m.

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