RFID Read Range Calculator

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

リーダーTX出力（dBm）

アンテナゲイン（dBi）

ケーブル損失（dB）

タグ感度（dBm）

周波数（MHz）

環境要素

推定読み取り範囲

0.0 m

(0.0 ft)

フリス伝送公式

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

EIRP = P_tx + G_ant - L_cable（線形スケール）

よくある質問

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.