How many calories in basil?

Answer 1

Effectively none. (It's not entirely calorie-free, but you're unlikely to use enough of it in any given dish to have a substantial impact on the calories.)

If you're literally eating it like a salad, you can basically treat it like lettuce, or any other leafy vegetable, as far as calories go. I did find one website that claimed that two tablespoons of fresh basil (about a fifth of an ounce) had 1 calorie.