Calbha Mòr is a tidal islet in Eddrachillis Bay, Sutherland, Scotland.
Calbha Mòr lies north of the Kylesku Bridge and west of the Duartmore Forest, in a location that is relatively inaccessible from the A894 road. It covers and comprises two rounded hills, the higher of which reaches .
It is separated from its smaller neighbour, Calbha Beag, by a channel deep. Calbha Beag is in area.
The sheltered BÃÂ gh Chalbha lies to the east and a major fish escape from a fish farm took place here in 2003.