Link Budget Calculator

Received powerSNR

vs distancevs frequency

Max distance (km)Show noise floor

At 5 km, 915 MHz

Received power

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Noise floor

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SNR

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Link margin

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Path loss

Free space	–
Atmospheric gases	–
Cloud / fog	–
Rain	–
Feedline / system	–
Total	–

RadioEnvironment

Preset:Meshtastic 915 MHzMeshtastic 868 MHzWi-Fi 2.4 GHz5.8 GHz PtP

Link

Distance (km)Frequency (GHz)Bandwidth (MHz)Required SNR (dB)TX antenna height (m)RX antenna height (m)

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Elevation angle (°)

Polarization tilt (°)

Tilt 0° is horizontal, 90° vertical. Only affects rain loss.

Transmitter

TX power (dBm)Antenna gain (dBi)Losses (dB)

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Receiver

Antenna gain (dBi)Losses (dB)

Credit: Link-Budget-GUI by SpecterStrider under Apache 2.0 licence.