LTE EARFCN to Frequency Calculator
Decode drive-test and OSS channel numbers.
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LTE EARFCN to Frequency Calculator by TheCalcTools
How the LTE EARFCN to Frequency Calculator works
Pick the LTE band, choose the conversion direction and enter the number.
Downlink frequency = F_DL_low + 0.1 × (N_DL − N_Offs-DL).
For FDD bands the uplink is lower by the duplex spacing.
The formula
Worked example
Using the default values shown in the calculator:
| LTE band | Band 3 (DL from 1805 MHz) |
|---|---|
| Convert | EARFCN → frequency |
| EARFCN (or DL frequency in MHz) | 1300 |
- Band 3 (1805 MHz start, N_offs 1200): EARFCN 1300 → 1805 + 0.1 × (1300 − 1200) = 1,815.0 MHz.
- Uplink = 1720.0 MHz (duplex 95 MHz).
Result:
| Downlink frequency (MHz) | 1,815.0 |
|---|---|
| Uplink frequency (MHz; FDD) | 1720.0 |
| EARFCN | 1,300 |
| Duplex spacing (MHz) | 95 |
Frequently asked questions
Is the EARFCN in range?
Check that the result lies inside the band’s downlink range in 3GPP TS 36.101; this tool does not reject out-of-band values.
Which bands are included?
Common bands 1, 2, 3, 4, 5, 7, 8, 20, 28, 38, 40 and 41. Other bands use the same formula with their own table values.
Sources and further reading
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This calculator gives estimates for information only. Check important results independently before you rely on them. See our disclaimer.