# Why does my 1 tablespoon of coffee grounds not equal 15 ml?

The bag of coffee I am using instructs to "Add 2 1/2 tablespoons (37 ml)" of ground coffee. When I measure out 2 1/2 tablespoons onto my food scale, it only comes out to about 13 ml.

Why does my 2 1/2 tablespoon measurement not equal 37 ml?

• Are you using actual tablespoon measuring spoons? And what do you mean by food scale? Usually that means something that measures weight, not volume.
– Cascabel
Commented Feb 25, 2017 at 17:36
• @Jefromi Yes I am using actual measuring spoons.And I am using a food scale that measures weight. Commented Feb 25, 2017 at 17:38
• Okay, so do you mean the scale says 13 grams, not 13 mL?
– Cascabel
Commented Feb 25, 2017 at 17:40
• @Jefromi Well, it is a digital kitchen scale ("Ozeri kitchen scale" from amazon) for measuring by weight, but it has a mL option (along with g and oz). Commented Feb 25, 2017 at 17:45
• @Jefromi I just measured again and the scale will show 13 grams and 13 ml for the same measurement. Commented Feb 25, 2017 at 17:47