Impedance Mismatch to Loss Impedance Mismatch to SWR SWR to Power Loss
Z0 + j0 Ω Z0 + j0 Ω SWR to 1
R1 Ω R1 Ω
X1 Ω X1 Ω
Loss = dB SWR = to 1 Loss = dB
    SWR is always greater than 1 to 1.
    This calculator converts the SWR across an impedance mismatch to loss. It does not account for the fact that SWR measured though a lossy (i.e., real) cable will always appear lower than the true SWR.