Axis

Length & distance

zeptometrezm

Zepto-scaled variant of the metre, exactly zm = 0.000000000000000000001 base unit.

Dimension
length
Canonical signature
L
System
si
Exactness
Exact

Definition record

How this unit is defined

Canonical base
1 zm = 1e-21 m
Conversion type
linear
Historical notes
Defined through the fixed speed of light in vacuum, 299 792 458 m/s.
Aliases
zepto meter, zepto meters, zepto 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 zm = 1e-21 m

Exact relationship

10 zm = 1e-20 m

Exact relationship