How are estimated sales and revenue calculated?
I don't blame you for wanting to know how we calculate our estimates...and we are more than happy to share that info with you!
The bottom-line is that Jungle Scout uses the information from Amazon's Best Sellers Rank (BSR) and estimates sales and revenue from that. But, creating algorithms to generate estimates that are as accurate as possible is more complicated than just using a product's BSR.
We also use an in-house data collection system to gather over a million data points from Amazon sales each month. In addition, we employ a data scientist to create new models every month, based off of this data, to ensure our members always have the most up to date and accurate algorithms available.
As for the period of time these estimates represent, they represent a 30-day time period.
You may want to read Greg's blog, on the science behind our estimates, as it has great information about how we estimate sales as well. :)