Free calculators that show the formula, your inputs, every step and the assumptions, with sources cited. Share any result with a link; no account, no cookies.
Antenna Length Calculator
Dipole and quarter-wave lengths from the speed of light, checked against the ARRL 468/f rule, with trim guidance.SWR to Return Loss Calculator
Convert SWR, return loss and |Γ| in any direction, plus mismatch loss and reflected power.Coax Loss Calculator
Your cable's datasheet loss, scaled to your frequency, plus the extra loss SWR causes on the line.
Dipole and quarter-wave lengths from the speed of light, checked against the ARRL 468/f rule, with trim guidance.SWR to Return Loss Calculator
Convert SWR, return loss and |Γ| in any direction, plus mismatch loss and reflected power.Coax Loss Calculator
Your cable's datasheet loss, scaled to your frequency, plus the extra loss SWR causes on the line.