Ham Radio Calculators

Essential calculators for antenna building, feedline selection, and bench work. All calculations run instantly in your browser.

AntennaCoax LossWavelengthA / W / VPower/dBOhm's Law

Frequency (MHz)

Quick Pick

3.97.214.221.328.450.1146.52446

Antenna Type

Half-Wave DipoleQuarter-Wave VerticalJ-PoleFull-Wave Loop