How many calories in 1 teaspoon of chopped onions?

Calories in a tablespoon of onion
There are:

• Approx 4 calories in one tablespoon of chopped raw onion

• Approx 11 -12 calories in 1 ounce (28g) of raw onion.

For information about the calorie content of other vegetables and a vegetable calories chart, which you may print out if you wish to and use as a daily guide, see the page link, further down this page, listed under Related Questions.