dBm to mW Conversion

The decibel-milliwatts (dBm) to milliwatts (mW) conversion calculator is a useful tool for converting power levels between units. To use the calculator, enter the power value in the designated field and click the “Convert” button. To start over, simply click the “Reset” button. This tool is useful for those working with radio frequency (RF) systems and other electronics where power levels are often measured in dBm.

dBm to mW Conversion Calculator

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How to Convert dBm to mW?

The power conversion of dBm to mW is given by the formula:

P_(mW) = 1mW ⋅ 10^{P(dBm) / 10}

So

1 dBm = 1,258925 mW

Example

Let’s say we have a power measurement of -20 dBm. We want to convert this value to mW.

To do this, we’ll use the following formula:

P_(mW) = 1mW ⋅ 10^{P(dBm) / 10}

Substituting our value of -20 dBm into the formula, we get:

P_(mW)= 10^(-20/10) mW = 0.01 mW

So the power measurement of -20 dBm is equivalent to 0.01 mW.

Another example could be if we have a power measurement of 5 dBm, then we can convert it to mW using the same formula:

P_(mW) = 10^(dBm/10) mW = 10^(5/10) mW = 3.162 mW

So the power measurement of 5 dBm is equivalent to 3.162277 mW.

dBm to mW Conversion Table

See Also