I get frustrated with Google. There so much much information that a lot of it is bound to be contradictory. I would always go with what the package says. You can always google a specifc brand or product rather than a generic search.

From the packages:

Bob's Red Mill Organic Chia Seeds
2tbls (26g)
130 cal, 7g fat, 10g carb, 10g dietary fiber, 6g protein (zero net carbs)

Sanar Naturals Organic Superfood Chia Seed
1tbls (14g)
66 cal, 4g fat, 5,5g carb, 4.8g dietary fiber, 4g protein ( .7 net carbs or 5 per 100g)

Nutiva Organic Chia Seed
1 tbls (12g)
60 cal, 3g fat, 5g carb, 5g dietary fiber, 3g protein (zero net carbs)