Link Budget Calculator

Calculate RF link margin from transmit power and losses.

Transmit Power (dBm)

Tx Antenna Gain (dBi)

Rx Antenna Gain (dBi)

Path Loss (dB)

Rx Sensitivity (dBm)

Formula

Margin = Tx Power + Tx Gain + Rx Gain - Path Loss - Rx Sensitivity

What is a link budget?

It sums gains and subtracts losses to find the received signal margin.

What link margin is considered safe?

A margin of at least 10 dB provides a reliable link.