Is there a list on some Website of amount of pix using different Megapixels and different memory cards?

Question

Trying to find out how many pitures my daughter can get with setting at 5MP and using a 1 GB memory card.

Answer 1

1 GB on a 5MP camera should give you around 400 photos.

The file sizes differs on all cameras (even if the MP remains the same). For this reason, any website would just be a guesstimate.

Answer 2

A megapixel is 1 million pixels, and is a term used not only for the number of pixels in an image, but also to express the number of sensor elements of digital cameras or the number of display elements of digital displays. For example, a camera with an array of 2048×1536 sensor elements is commonly said to have "3.1 megapixels" (2048 × 1536 = 3,145,728).

Check this website.
http://en.wikipedia.org/wiki/Pixel