RFID Read Range Calculator

Calculate RFID read range based on reader power, tag sensitivity, and antenna gain.

Reader TX Power (dBm)

Antenna Gain (dBi)

Cable Loss (dB)

Tag Sensitivity (dBm)

Frequency (MHz)

Environment Factor

Estimated Read Range

0.0 m

(0.0 ft)

Friis Transmission Formula

R = (c / 4πf) × √(EIRP / P_tag) × env_factor

Where EIRP = P_tx + G_ant - L_cable (in linear scale)

Frequently Asked Questions

Yes, all tools on RFIDFYI are completely free with no account required. Tools run entirely in your browser (client-side JavaScript) and do not send your data to any server.

All tools are fully responsive and work on smartphones, tablets, and desktop browsers. Calculation and encoding tools work on any device.