Megapixel

CCD resolution of one million pixels. digital cameras are commonly rated by Megapixels. You multiply the horizontal resolution by the vertical resolution to get the total pixel count:

1280 x 960 pixels = 1 Megapixel
1600 x 1200 pixels = 2 Megapixels
2048 x 1536 pixels = 3 Megapixels
2272 x 1704 pixels = 4 Megapixels
2560 x 1920 pixels = 5 Megapixels … and so on