Convert MM To KM

Please enter a value below to convert millimeters to kilometers:

In order to do a reverse conversion from kilometers to millimeters clear values in the above fields and input the value in the “Kilometers” field or go to kilometers to millimeters converter page.

Facts about Millimeter

Basic facts: A millimeter [American spelling] or millimetre [international spelling – symbol: mm] is a unit of length in the SI (International System of Units). The millimeter is equivalent to one-thousandth of a meter and it is defined as the distance traveled by light in 1/299 792 458 000 of a second.

History: The prefix “milli” is one of many metric prefixes. It shows the base unit’s one-thousandth, in this instance, the meter. The current definition is based on the distance traveled by the speed of light in a given amount of time, however, the definition of the meter has changed over time. The relationship between the meter and the millimeter is continuous. Before this definition, the meter was based on the length of a prototype meter bar. The meter has been re-defined based on the changes made to the definition of a second, in 2019.

Use: The millimeters are used to exactly measure the length of small or narrow objects. On a metric ruler or stick, it is the smallest unit of length.

Facts about Kilometer

Basic facts: A kilometer is a unit of length in the metric system, its symbol is “km”, it is equivalent to one thousand meters and 0.6214 miles. [kilo-is the SI prefix for 1000]. A slang term for the kilometer in the US, Canadian, and UK, militaries is “klick”.

History: The origin of the kilometer is related to that of the meter, and its present definition is the distance traveled by light in 1/299 792 458 seconds. The relationship between the meter and the kilometer will remain constant, although the above-mentioned definition is subject to change.

Use: Currently, it is the official unit of measurement for expressing distances between the world’s most geographical places on land. Though, there still remain some countries that mainly use the mile instead of the kilometer including the United Kingdom (UK) and the United States (US). The UK has adopted the metric system, unlike the United States, while in the UK, the metric system is widely used in government, industry, and commerce, rest of the imperial system can still be seen in the United Kingdom’s use of miles in its road systems.

How many kilometers in a mm? 

1 mm is equivalent to 0.000001 kilometers. Use 0.000001 as the factor to convert millimeters to kilometers. Below find some popular millimeters to kilometers conversion questions:

• How many kilometers in 2 millimeters?  2 millimeters x 0.000001= 0.000002 number kilometers
• How many kilometers in 3 millimeters?  3 millimeters x 0.000001 = 0.000003 number kilometers
• How many kilometers in 5 millimeters?  5 millimeters x 0.000001 = 0.000005 number kilometers
• How many kilometers in 10 millimeters? 10 millimeters x 0.000001 = 0.00001 number kilometers
• How many kilometers in 20 millimeters? 20 millimeters x 0.000001 = 0.00002 number kilometers
• How many kilometers in 50 millimeters? 50 millimeters x 0.000001 = 0.00005 number kilometers
• How many kilometers in 100 millimeters? 100 millimeters x 0.000001 = 0.0001 number kilometers
• How many kilometers in 1000 millimeters? 1000 millimeters x 0.000001 = 0.001 number kilometers

Millimeters to Kilometers Conversion Chart

Millimeters	Kilometers	Millimeters	Kilometers	Millimeters	Kilometers	Millimeters	Kilometers
1	0.000001	26	0.000026	51	0.000051	76	0.000076
2	0.000002	27	0.000027	52	0.000052	77	0.000077
3	0.000003	28	0.000028	53	0.000053	78	0.000078
4	0.000004	29	0.000029	54	0.000054	79	0.000079
5	0.000005	30	0.00003	55	0.000055	80	0.00008
6	0.000006	31	0.000031	56	0.000056	81	0.000081
7	0.000007	32	0.000032	57	0.000057	82	0.000082
8	0.000008	33	0.000033	58	0.000058	83	0.000083
9	0.000009	34	0.000034	59	0.000059	84	0.000084
10	0.00001	35	0.000035	60	0.00006	85	0.000085
11	0.000011	36	0.000036	61	0.000061	86	0.000086
12	0.000012	37	0.000037	62	0.000062	87	0.000087
13	0.000013	38	0.000038	63	0.000063	88	0.000088
14	0.000014	39	0.000039	64	0.000064	89	0.000089
15	0.000015	40	0.00004	65	0.000065	90	0.00009
16	0.000016	41	0.000041	66	0.000066	91	0.000091
17	0.000017	42	0.000042	67	0.000067	92	0.000092
18	0.000018	43	0.000043	68	0.000068	93	0.000093
19	0.000019	44	0.000044	69	0.000069	94	0.000094
20	0.00002	45	0.000045	70	0.00007	95	0.000095
21	0.000021	46	0.000046	71	0.000071	96	0.000096
22	0.000022	47	0.000047	72	0.000072	97	0.000097
23	0.000023	48	0.000048	73	0.000073	98	0.000098
24	0.000024	49	0.000049	74	0.000074	99	0.000099
25	0.000025	50	0.00005	75	0.000075	100	0.0001

Convert millimeters to other volume units

• Convert MM to Inches
• Convert MM to Feet
• Convert MM to CM