Will vs. Going to

Will and going to are the two most common ways of expressing the future. While they are similar in many aspects, there are three differences:

1) Predictions

Predictions expressed by "will" are based on your intuition and experience.

Predictions expressed by "going to" are based on what's happening at the present moment.

Test 1, Test 2

2)

"Going to" usually refers to the near future. While will doesn't refer to any specific moment  (it may sometimes concern very far future).

3) Intention

This is a subtle difference but it is noticable: if someone uses the "going to" form, the person is often talking about his or her intentions. In other words, there is an ephasis on the intention of doing something.

Test 1