During the roasting process, a bean loses its mass. ... If you measure your coffee by scoops, light roasted coffee will have more caffeine. Since the beans are denser than a darker roast. However if you weigh out your scoops, darker roasts will have more caffeine, because there is less mass.

Is a dark roast coffee stronger?

Let's dispel the most common myth right off the bat: A dark-roasted bean contains more caffeine than a light-roasted bean due to its stronger flavor. Not true. Actually, the caffeine content in both is virtually the same.

Does dark roast have more caffeine than medium?

So, does dark roast have more caffeine? To answer it simply, no, a dark roast coffee does not have more caffeine. A light roast coffee bean actually has more caffeine than it's dark roasted counterpart.