# Community

## How does abbyy calculate A4 page area? Answered

I have read "Billing Terms", and it says that if a page is a little bigger than A4 size (8.268*11.693 in inch), it will be treated as double A4 pages.

But I have a page with size 8.305*11.708 in inch. It is surely bigger than 8.268*11.693. When I post it to cloud OCR sdk, it just cost me 5 credits.

I am wondering why?

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All calculations are done with integer variables, so there are some rounding nuances in favor of our users. For example, for your image the calculation formula looks like this:

`imageSizeW = (11,708 (inch) * 300 (dpi)) = 3512,4 (pixels)imageSizeH = (8,305 (inch) * 300 (dpi)) = 2491,5 (pixels)resolution = 300areaOfA4 = 97 imageSizeW / resolution ≈ 11imageSizeH / resolution ≈ 8imageArea = 11 * 8 = 88 numberOfPages = imageArea / areaOfA4 = 88 / 97 = 0,907 ≈ 1 (page)`

Kindly see also the Page Counter Calculation article for some details.

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