Friis Transmission Equation Calculator | |
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Transmitter Power (Pt) | |

Transmitter Gain (Gt) | |

Receiver Gain (Gr) | |

Distance (d) | |

Frequency (f) | |

Recieved Power (Pr): | {{friisTransmissionResult()}} |

## Formula:

### Pr=Pt × Gt × Gr × (c/(4 × π × d× f))2

### P(dB)r=Pt + Gt + Gr + (20 × log(c/(4 × π × d × f)))

Where,

Pr = Received Power

Pt = Transmitter Power

Gt = Transmitter Gain

Gr = Receiver Gain

d = Distance

f = Frequency

P(dB)r = Received Power in dB

c = Speed of light (equal to 3 ×108 m/s)