Megapixel is like megabite. Megabite has 1 000 000 bytes so megapixel has 1000 000 pixels. Mega refers to 10^6
That will vary based on what the image is of, what the file type is, how it's compressed, etc. A typical 1 MB image will be at least 1 megapixel.
the two units are in no way related so no equivalence can me made exspet ya mum she knows every thing
they are two completely different things
The prefix M (mega) is equivalent to 10^6 (one million). 1 megapixel = 1*10^6 = 1000000 pixels 800000 pixels = 800000/10^6 = 0.8 megapixels