dBm to Watts Calculator

This dBm to watts calculator interchanges and converts the power measurements between units of decibel milliwatts (dBm) and watts (W), and milliwatts(mW).

What is dBm?

dBm is the acronym for Decibels per milliwatt & is a unit of power.

The intensity of the sound and the electrical signal power is described in the Decibels per milliwatt(dBm). dBm describes the amount of power an antenna or an amplifier is able to produce. You can transform the units between decibels per milliwatt (dBm) and watts (W)/milliwatts (mW) with the help of dBm to watts calculator.

How to Convert dBm to Watts?

Our calculator uses the following formula for dB to watts conversion:

P (W) = 1W ⋅ 10((P(dBm) – 30) / 10)

Where:

P (W) = power in watts

P (dBm) = power in dBm

Our db to watts converter gauges the dBm from Watt and back Watt from dBm.

How to Convert dBm to mW?

For dBm to milliwatt conversion, you need to use the formula:

P(mW) = 1mW ⋅ 10(P(dBm) / 10)

Where

P(mW) = power in milliwatts

P(dBm) = power in dBm

How to Convert Watt to dBm?

For watts to dBm conversion use the formula:

P(dBm) = 10 ⋅ log10( P(W) / 1W) + 30

Where

P(dBm) = power in dBm

P(W) = power in watts

How to Convert mW to dBm?

The mW to dBm conversion can be done by the following formula:

P(dBm) = 10 ⋅ log10(P(mW) / 1mW)

Where:

P(dBm) =power in dBm

P(mW) = power in milliwatts.

Practical Example:

Let’s consider there is a signal with a power of 30 dBm, then what is the dBm to watt conversion?

Solution:

Now for the dBm to watt conversion, use the dBm to watts formula

P(W) = 1W ⋅ 10(P (dBm) / 10) / 1000

Enter the values of the dBm:

P(watts) = 10(30/10) / 1000 =1 watts

To covert the dBm to milliwatt multiplied it by 1000:

P(milliWatt) = 1000 mW

The dBm to Watt Conversion Table:

The dBm to watt conversion table makes it easy to understand the concept:

Power (dBm)	Power (dBW)	Power (watt)	Power (mW)
-100 dBm	-130 dBW	0.1 pW	0.0000000001 mW
-90 dBm	-120 dBW	1 pW	0.000000001 mW
-80 dBm	-110 dBW	10 pW	0.00000001 mW
-70 dBm	-100 dBW	100 pW	0.0000001 mW
-60 dBm	-90 dBW	1 nW	0.000001 mW
-50 dBm	-80 dBW	10 nW	0.00001 mW
-40 dBm	-70 dBW	100 nW	0.0001 mW
-30 dBm	-60 dBW	1 μW	0.001 mW
-20 dBm	-50 dBW	10 μW	0.01 mW
-10 dBm	-40 dBW	100 μW	0.1 mW
-1 dBm	-31 dBW	794 μW	0.794 mW
0 dBm	-30 dBW	1.000 mW	1.000 mW
1 dBm	-29 dBW	1.259 mW	1.259 mW
10 dBm	-20 dBW	10 mW	10 mW
20 dBm	-10 dBW	100 mW	100 mW
30 dBm	0 dBW	1 W	1000 mW
40 dBm	10 dBW	10 W	10000 mW
50 dBm	20 dBW	100 W	100000 mW
60 dBm	30 dBW	1 kW	1000000 mW
70 dBm	40 dBW	10 kW	10000000 mW
80 dBm	50 dBW	100 kW	100000000 mW
90 dBm	60 dBW	1 MW	1000000000 mW
100 dBm	70 dBW	10 MW	10000000000 mW

The db to watts calculator is a useful tool for converting power levels between units (dBm) to milliwatts (mW) and Watts.

The Working of dBm to Watts Calculator:

Let’s see the dBm to watt calculator functionality in simple steps:

Input:

Choose the conversion type
Enter the units
Hit the calculate

Output:

dBm to watts conversion
Watts to dBm conversion
dBm to milliwatts conversion

References:

From the source Wikipedia: dBm, Watts
From the source of Wilsonpro.com dB, What is dBm?