Enter the power in dBm into the calculator to determine the equivalent power in Watts. This calculator provides a quick conversion from dBm (decibel-milliwatts) to Watts.
dBm to Watts Formula
The following formula is used to convert dBm to Watts:
P(W) = 10^{((P(dBm) - 30) / 10)}Variables:
- P(W) is the power in Watts
- P(dBm) is the power in dBm
To convert dBm to Watts, subtract 30 from the dBm value, divide by 10, and then raise 10 to the power of the result.
What is dBm?
dBm is a unit of power expressed in decibels relative to one milliwatt (mW). It is a convenient way to express power levels in communication systems, RF engineering, and electronics. dBm is a logarithmic unit, which allows for representation of very large or small numbers in a compact format.
How to Calculate Power in Watts from dBm?
The following steps outline how to convert the power from dBm to Watts.
- First, determine the power in dBm.
- Next, use the formula P(W) = 10^((P(dBm) – 30) / 10).
- Finally, calculate the power in Watts.
- After inserting the dBm value and calculating the result, check your answer with the calculator above.
Example Problem:
Use the following variable as an example problem to test your knowledge.
Power in dBm (P(dBm)) = 20 dBm
Using the formula, the power in Watts is calculated as:
P(W) = 10^((20 – 30) / 10) = 0.1 Watts