Speaking to the ITV-F1 programme, Ecclestone said: "Next year will be the same, but the year after we will lose two or three and gain two or three."
A number of countries have shown interest in hosting a Formula One Grand Prix, including Russia, China, Turkey, Egypt, Lebanon and Bahrain.
Ecclestone has already promised Russia a place if they can come up with the facilities and guarantee revenues - and Ecclestone hinted that China would also be a strong contender. "We may be going to that place where there's a lot of people and they eat nice Chinese food," he said.
Circuits that could lose out in any reshuffle would be Hungary, Brazil, Belgium and San Marino.
Formula One supremo Bernie Ecclestone intends to make dramatic changes to the Formula One venue calendar for the 2004 season.
