FeedBurner’s subscriber count is based on an approximation of how many times your feed has been requested in a 24-hour period. Subscribers is inferred from an analysis of the many different feed readers and aggregators that retrieve this feed daily. Subscribers is not computed for browsers and bots that access your feed.

Subscribers counts are calculated by matching IP address and feed reader combinations, then using our detailed understanding of the multitude of readers, aggregators, and bots on the market to make additional inferences.