RSRP, RSRQ and RSSI Calculator
RSRQ = N × RSRP ÷ RSSI, in dB. Enter two and read the third.
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RSRP, RSRQ and RSSI Calculator by TheCalcTools
How the RSRP, RSRQ and RSSI Calculator works
Enter the measured RSRP and RSSI (or the RSSI from a scanner) and pick the carrier bandwidth.
RSRQ is N (the number of PRBs in the measurement bandwidth) times RSRP divided by RSSI.
The tool also shows the RSSI when every resource element is transmitting and the implied load.
The formula
Worked example
Using the default values shown in the calculator:
| RSRP (dBm) | -95 dBm |
|---|---|
| RSSI (dBm) | -68 dBm |
| Bandwidth (PRBs) | 20 MHz (100 PRB) |
- RSRQ = 10 log₁₀ 100 + (−95) − (−68) = 20 − 95 + 68 = -7.0 dB.
- RSSI with every subcarrier active would be -64.2 dBm, so the cell is using about 42% of resources.
Result:
| RSRQ (dB) | -7.0 |
|---|---|
| RSSI if all subcarriers carry power (dBm) | -64.2 |
| RSRQ at full load (dB) | -10.8 |
| Estimated resource usage | 42% |
Frequently asked questions
What is a good RSRQ?
As a rough guide: above −10 dB is good, −10 to −15 dB fair, below −15 dB poor. Even a fully loaded cell gives about −10.8 dB, so a lightly loaded cell can read lower than −10 dB only if there is interference.
Why is RSRP not enough?
RSRP shows signal strength; RSRQ and SINR show quality. Strong RSRP with poor RSRQ points to interference or overlap.
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.