RF Calculator
Free online RF and RAN calculator tools for telecom engineers — signal quality, resource blocks, frequency bands, spectrum efficiency, channel numbers, PIM, and O-RAN capacity.
An RF calculator simplifies the calculations of the radio-frequency (RF) formulas that network engineers use every day. Whether you are converting LTE signal quality metrics, identifying which cellular band a frequency belongs to, or checking whether two carriers will produce passive intermodulation (PIM) interference, these tools apply the relevant 3GPP specification formulas instantly — saving manual calculation time in the field or office.
The RF calculators below cover the most common tasks in 4G LTE and 5G NR network planning and optimisation — from signal quality and resource allocation to propagation modelling, receiver design, and O-RAN fronthaul dimensioning. Each tool links directly to the 3GPP or IEC standard used so you can verify every formula and reference it in technical reports.
RSRP / RSRQ / RSSI Calculator
Convert between LTE signal quality metrics. Derive any one of RSRP, RSRQ, or RSSI from the other two per 3GPP TS 36.214.
PRB Calculator
Calculate Physical Resource Block count and resource elements for LTE (4G) and 5G NR across all channel bandwidths and numerologies.
Frequency → Band Converter
Identify all GSM, UMTS, LTE and 5G NR bands matching a given frequency. Covers DL/UL, FDD/TDD, with a full reference table of 70+ cellular bands.
Spectrum Efficiency Calculator
Calculate peak spectral efficiency (bps/Hz) and data rate for 2G GSM, 3G HSPA+, 4G LTE, and 5G NR based on modulation, MIMO layers, and bandwidth.
ARFCN → Frequency Calculator
Convert any ARFCN, UARFCN, LTE EARFCN or 5G NR-ARFCN to carrier frequency. Auto-detects GSM and UMTS bands with overlapping range handling.
PIM Calculator
Calculate 3rd, 5th and 7th order passive intermodulation products for two carrier frequencies. Flags products that fall in-band.
Open RAN Capacity Calculator
Dimension O-RAN deployments: eCPRI fronthaul bandwidth per RU, DU count, CU-UP capacity, and midhaul/backhaul. Supports 2T2R to 64T64R with BFP compression.
SINR → CQI → MCS → Throughput
Map SINR (dB) to CQI index, modulation scheme, code rate and estimated peak throughput for LTE and 5G NR. Uses 3GPP TS 36.213 and TS 38.214 CQI tables with MIMO layer support.
Cell Radius & Site Count Estimator
Calculate maximum cell radius from MAPL using Okumura-Hata, COST-231 or free-space propagation models. Estimates sites needed to cover a geographic area.
Noise Figure & Receiver Sensitivity
Calculate receiver sensitivity from noise figure and bandwidth. Compute cascaded NF using the Friis formula for LNA, filter and mixer chains in LTE and 5G NR receivers.
Frequency ↔ Wavelength Calculator
Convert frequency to wavelength and wavelength to frequency for any RF signal. Calculates free-space wavelength, half-wave dipole and quarter-wave monopole antenna lengths.
EIRP / ERP Calculator
Calculate Effective Isotropic Radiated Power (EIRP) and Effective Radiated Power (ERP) from transmit power, antenna gain and cable losses. Supports dBm, dBW, W and dBd inputs with regulatory context.
Frequently Asked Questions
What is an RF calculator?▾
An RF calculator simplifies radio-frequency computations used in cellular network planning, deployment, and optimization. Instead of manually applying 3GPP formulas, you enter the known parameters and get instant results for metrics such as signal quality (RSRP/RSRQ), resource allocation (PRB count), band identification, spectral efficiency, channel numbers (ARFCN/EARFCN/NR-ARFCN), and passive intermodulation (PIM) products.
Who uses RF calculators?▾
RF planners, network optimisation engineers, drive-test technicians, site integration engineers, and telecoms students use RF calculators daily. They are useful during network audits, troubleshooting sessions, field maintenance, and exam preparation for 3GPP-related certifications and vendor-specific training.
What does RSRP mean in LTE?▾
RSRP (Reference Signal Received Power) is the average received power of the LTE cell-specific reference signals (CRS), measured in dBm. It is the primary indicator for coverage, cell selection, and handover decisions per 3GPP TS 36.214. Values above −80 dBm indicate excellent coverage; below −110 dBm is considered poor.
How do I find which band a frequency belongs to?▾
Use the Frequency → Band Converter. Enter the frequency in MHz or GHz and the tool matches it against a database of 70+ cellular bands across GSM, UMTS/WCDMA, LTE, and 5G NR. Results are grouped by band name (e.g., "850 MHz" → GSM 850, LTE B5, NR n5) and show both FDD and TDD allocations.
What is spectral efficiency and how is it calculated?▾
Spectral efficiency (SE) is the data rate achievable per unit of spectrum, in bits per second per hertz (bps/Hz). It is calculated as: SE = MIMO layers × bits/symbol × coding rate × (1 − overhead). For example, 4G LTE with 4×4 MIMO, 256QAM, 0.93 coding rate and 25% overhead gives 4 × 8 × 0.93 × 0.75 ≈ 22.3 bps/Hz peak SE. 5G NR with 8-layer MIMO can exceed 30 bps/Hz.
Are these RF calculators free to use?▾
Yes. All RF calculators on TelcoCalc are completely free. They run entirely in your browser using 3GPP-standardised formulas — no account, download, or installation required. Reference standards include 3GPP TS 45.005 (GSM), TS 25.101 (UMTS), TS 36.101 (LTE), TS 38.101-1/2 (5G NR FR1/FR2), and IEC 62037 (PIM).
3GPP Reference Standards
- GSM: 3GPP TS 45.005 — Radio transmission and reception
- UMTS/WCDMA: 3GPP TS 25.101 — UE radio transmission and reception (FDD)
- LTE: 3GPP TS 36.101 — E-UTRA UE radio transmission and reception; TS 36.214 — Physical layer measurements
- 5G NR (FR1): 3GPP TS 38.101-1 — NR UE radio transmission and reception (FR1)
- 5G NR (FR2 / mmWave): 3GPP TS 38.101-2 — NR UE radio transmission and reception (FR2)
- PIM: IEC 62037 — Passive intermodulation; 3GPP TS 25.466