RF Utility: RF and Cellular Calculators
Free engineering calculators for power, propagation, cable loss and cellular bands. Check the units, follow a worked example and explore the source references.
Wavelength Calculator
Wavelength, half-wave and quarter-wave lengths with velocity factor.
VSWR & Return Loss
Convert mismatch measurements into reflection and reflected power.
RF Link Budget
EIRP, received power and link margin with a signed waterfall and PASS/FAIL verdict.
Coax Cable Loss
Cable attenuation with verified Times LMR and Gigatronix LBC data, typical RG references and manual entry.
LTE EARFCN Calculator
Convert LTE EARFCN to Frequency and back. 3GPP TS 36.101.
5G NR ARFCN Calculator
Convert channel numbers with the current FR1 model. Limitations explained.
Frequency Band Finder
Identify LTE and 5G bands from a raw frequency.
Free Space Path Loss
FSPL plus wavelength and antenna element lengths.
dBm to Watts
Convert RF power between dBm, Watts and mW.
Explore by Category
Tested Calculations
Automated checks for the supplied formulas, with dataset limits explained on each tool.
Client-Side Speed
Calculator inputs stay in your browser. Reference pages arrive as fast, readable HTML.
Engineer-First UX
Information-dense, dark-mode ready, zero distracting fluff.