# W, dBW, and dBm Calculator

## This calculator and formula will convert RF power in watts to decibels and decibels into watts.  RF power can be displayed in both watts and decibels. Using decibels provides an easier route to navigate the gains and losses in power.

Inputs
Power
dBW
dBm
W

PdBm = power in decibel-milliwatts

PdBW  = power in decibel-watts

PmW = power in milliwatts

PW = power in watts

### Equations

$$PdBm = 10log10PmW$$

$$PdBW = 10log10PW$$

$$PmW = 10 pdBm/10$$

$$PdBW = PdBm - 30$$

### Application

These calculations can be used when you need to calculate power losses and gains between a transmitter and a receiver.