ARFCN Calculator

Channel spacing: 200 kHz
Downlink Frequncy 200 kHz

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Uplink Frequncy 200 kHz

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Select a GSM band and enter ARFCN to view frequency range (200 kHz span).

What is ARFCN?

ARFCN (Absolute Radio Frequency Channel Number) is a unique number assigned to each radio channel in GSM systems. Instead of using raw frequency values, GSM networks use ARFCN numbers to simplify channel allocation and planning.

Key Points:

How ARFCN Works in GSM

In GSM, each channel contains an uplink frequency (Mobile Station to BTS) and a downlink frequency (BTS to Mobile Station). The standard GSM channel spacing is 200 kHz.

Basic GSM ARFCN Formula
Uplink Frequency (MHz) = Base Frequency + (ARFCN × 0.2)
Downlink Frequency (MHz) = Uplink Frequency + Duplex Spacing

GSM Frequency Bands and ARFCN Ranges

GSM operates in multiple bands worldwide. The most important GSM band types are listed below.

GSM 900 Band

Parameter Value
Uplink890 – 915 MHz
Downlink935 – 960 MHz
Duplex spacing45 MHz
ARFCN range1 – 124
Channel spacing200 kHz
Formula (GSM 900):Uplink = 890 + (ARFCN × 0.2)
Downlink = Uplink + 45

Extended GSM (E-GSM 900)

Parameter Value
Uplink880 – 915 MHz
Downlink925 – 960 MHz
Duplex spacing45 MHz
ARFCN range0 - 124 and 975 – 1023

GSM 1800 (DCS 1800)

Parameter Value
Uplink1710 – 1785 MHz
Downlink1805 – 1880 MHz
Duplex spacing95 MHz
ARFCN range512 – 885
Channel spacing200 kHz
Formula (GSM 1800):Uplink = 1710 + ((ARFCN − 512) × 0.2)
Downlink = Uplink + 95

GSM 850 Band

Parameter Value
Uplink824 – 849 MHz
Downlink869 – 894 MHz
Duplex spacing45 MHz
ARFCN range128 – 251

GSM 1900 (PCS 1900)

Parameter Value
Uplink1850 – 1910 MHz
Downlink1930 – 1990 MHz
Duplex spacing80 MHz
ARFCN range512 – 810

Why ARFCN is Important in RF Engineering

FAQ on ARFCN Calculator

1. What does ARFCN stand for?

ARFCN stands for Absolute Radio Frequency Channel Number.

2. What is GSM channel spacing?

In GSM, the channel spacing is 200 kHz (0.2 MHz).

3. Is ARFCN used in LTE and 5G?

Yes. LTE uses EARFCN and 5G uses NR-ARFCN.