This Coax Loss Calculator covers most of the coax types available for Ham and Commercial use.  It calculates the direct loss of the coax itself, and, if an SWR value is entered, will calculate the additional loss in the cable due to SWR.
Choose Parameters
Line Type:
Line Length: Feet Meters
Frequency:  MHz
Load SWR:  : 1
Power In:  W
Matched Loss:  dB
SWR Loss:  dB
Total Loss:  dB
Power Out:  W