Jpeg calculating max size

Question

I have to say the I don\'t know much about how file formats work. My question is say I have a jpeg file that is 200 px by 200 px, how can one calculate what the maximum size th

Answer 1

As a rule of thumb, no JPEG is going to be larger than an equivalent size 32-bit bitmap. A 32-bit bitmap will have 4 bytes per pixel in the image, so multiply the dimensions together (200x200 = 40000), then multiply that by 4 bytes (40000x4 = 160000), and you'll have an upper bound in bytes - for your example, 160000 bytes is approximately 156kb.