Calculate RF free-space path loss from frequency and distance.
This calculator applies the RF formula below and returns the engineering result instantly.
Use this calculator for RF links, antenna design, wireless modules, LoRa, WiFi and embedded RF projects.
RF calculations are estimates. Verify final designs with measurements, datasheets and real installation conditions.
They are estimates based on formulas. Real systems can differ because of cables, connectors, antenna placement and environment.
Check antenna gain, cable loss, impedance matching, ground plane, legal limits and real measurements.