Axis

Length & distance

megametreMm

Mega-scaled variant of the metre, exactly Mm = 1000000 base unit.

Dimension
length
Canonical signature
L
System
si
Exactness
Exact

Definition record

How this unit is defined

Canonical base
1 Mm = 1,000,000 m
Conversion type
linear
Historical notes
Defined through the fixed speed of light in vacuum, 299 792 458 m/s.
Aliases
mega meter, mega meters, mega m in length context

Same dimension

Related units

metresiminchimperial usinfootimperial usftmileimperial usmiyardimperial usydlight-yearastronomicallypixelcsspxnanometresinm

Common conversions

Every conversion routes through the canonical base of the dimension.

1 Mm = 1,000,000 m

Exact relationship

10 Mm = 10,000,000 m

Exact relationship