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Physics Calculators ▶ dBm to Watts Calculator

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**Table of Content**

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

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.

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.

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

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

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.

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 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.

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

From the source Wikipedia: dBm, Watts

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