1 tablespoon of olive oil in grams?
It depends on what substance you're measuring. A tablespoon is a
measure of volume, and a gram is a measure of mass, so you can't
convert them directly.
1 tablespoon is 15 ml. Thus, 1 tablespoon of water has a mass of
15 grams, but a tablespoon of some other substance may weigh more
or less than that.