Is it "less calories" or "fewer calories"?

A little morei

Nutrition labels often say "less," but grammar treats calories as countable — you can have exactly 120 of them. The same logic applies to grams of sugar or milligrams of sodium: fewer for countable units, less for the overall amount (like "less fat" when fat is the mass).

The full entryii

More quick answersiii

• → When do I use "fewer"? Use fewer for things you can count: fewer chairs, fewer errors, fewer hours logged.
• → When do I use "less"? Use less for amounts you measure rather than count: less water, less noise, less patience.
• → Is it "less people" or "fewer people"? "Fewer people." People are countable, so the correct word is fewer.
• → Is it "10 items or less" or "10 items or fewer"? Grammatically, "10 items or fewer." Items are countable, so they take fewer.
• → Is it "under 10 people" or "fewer than 10 people"? "Fewer than 10 people" is the precise form — people are countable, so fewer fits.