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Addiction calculator tells you how much shorter your life would be if you were addicted to alcohol, cigarettes, cocaine, methamphetamine, methadone, or heroin.

A long night of studying? Or maybe you're on a deadline? The coffee kick calculator will tell you when and how much caffeine you need to stay alert after not sleeping enough 😀☕ Check out the graph below!

Distance calculator helps you find the distance between two points on a Cartesian coordinate system.

The scientific notation calculator converts any decimal to scientific notation.