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!

The cow gestation calculator allows you to compute the day calving will start for different breeds of cow.

The dog raisin toxicity calculator tells you whether the amount of raisins that your beloved dog consumed is toxic and poses a danger to its health. 🐕

Vampire apocalypse calculator shows what would happen if vampires were among us using the predator - prey model.