Note that to convert any of these energy quanitities into another in the real world would require perfect efficiency of conversion. Thermodyanmics will not allow this.

Energy contained in

grams of butter.

Energy needed to boil

litres of water from room temperature.

Kinetic energy of

Volkswagen Beetles dropped from 2 meters.

Energy capacity of

Macbook Air batteries

Nutritional energy of

2000 Calorie recommended daily food intakes.

Energy of

grams of Uranium-235 undergoing nuclear fission.

Energy output of a strong amateur cyclist pedaling for