Axis

Sound level

decibel milliwattdBm

Power level relative to 1 mW.

Dimension
power
Canonical signature
L^2*M*T^-3
System
common
Exactness
Exact by definition

Definition record

How this unit is defined

Canonical base
1 dBm = 0.001258925411794167 W
Conversion type
log
Historical notes
dBm is a power measure; converting to dBV needs impedance.
Aliases
dbm, decibel relative to 1 mW

Same dimension

Related units

wattsiWhorsepower (mechanical)imperial ushpquettawattsiQWronnawattsiRWyottawattsiYWzettawattsiZWexawattsiEWpetawattsiPW

Common conversions

Every conversion routes through the canonical base of the dimension.

1 dBm = 0.001258925411794167 W

Exact by definition relationship

10 dBm = 0.01 W

Exact by definition relationship