Just how big is the iPad? Revenues from the 15-month-old iPad have now surpassed those of Macs, according to SplatF. In the most recent quarter, Apple sold 9.2 million iPads for $6 billion in revenue. This compares to 3.9 million Macs for $5.1 billion in revenue.

This news, which was unveiled during Apple’s conference call today with investors, is amazing considering the first Mac rolled off the line in 1984.

Mac vs. iPad Revenue, July 2011

Mac vs. iPad Revenue, July 2011

According to Apple COO Tim Cook:

“We do believe that some customers chose to purchase an iPad instead of a new Mac during the quarter, but we also believe that even more customers chose to purchase an iPad over a Windows PC.”

The iPad and iPhone now represent more than two-thirds of Apple’s oversale sales.

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