How much caffeine is in coffee?

An 8-ounce cup of brewed coffee contains between 95 and 200 milligrams of caffeine, while an 8-ounce cup of instant coffee ranges from 27 to 173 milligrams. Single-serve varieties of brewed coffee contain 75 to 150 milligrams, while specialty drinks such as lattes contain between 63 and 175 milligrams.

Studies show that regular coffee consumption may reduce the risk of heart disease, stroke, type 2 diabetes and cancers of the liver, colon, prostate and ovaries. Drinking coffee can increase energy and improve memory. Experts agree that people should drink no more than four cups or 400 milligrams of coffee each day to reap the health benefits.