Wondering on how many images your memory card can hold using that X-mp'ed digital camera of yours? I too wondered not long ago, good thing i found an online megapixel calculator and i would like to share it with you people.

Below is the list of the common megapixel sizes of the cameras in the market today. I believe that these images are using normal/ default image quality settings.

3.9 Megapixels
Resolution: 2272 x 1704 (or 3,871,488) pixels
RAW format: 5.8 MB
JPG format: 1.2 Megabytes

5.0 Megapixels
Resolution: 2592 x 1944 (or 5,038,848) pixels
RAW format: 7.6 MB
JPG format: 1.4 MB

6.0 Megapixels
Resolution: 2816 x 2112 (or 5,947,392) pixels
RAW format: 8.9 MB
JPG format: 1.6 MB

7.1 Megapixels
Resolution: 3072 x 2304 (or 7,077,888) pixels
RAW format: 10.6 MB
JPG format: 1.8 MB

8.0 Megapixels
Resolution: 3264 x 2448 (or 7,990,272) pixels
RAW format: 12.0 MB
JPG format: 1.9 MB

10.0 Megapixels
Resolution: 3648 x 2736 (or 9,980,928) pixels
RAW format: 15.0 MB
JPG format: 2.2 MB

12.7 Megapixels
Resolution: 4368 x 2912 (or 12,719,616) pixels
RAW format: 19.1 MB
JPG format: 2.6 MB

When set to maximum quality the file size increases, to get the file size when set to max quality multiply the file sizes above by around 1.25-1.50 to get the ESTIMATED file size of the corresponding megapixel.

I hope this helps ^__^