Per 100 g, Butter has 717 calories and 0.9 g of protein, while Olive oil has 884 calories and 0 g. Butter is the lighter choice, 167 kcal fewer per 100 g. Butter carries more protein, 0.9 g more per 100 g.
| Per 100 g | Butter | Olive oil |
|---|---|---|
| Calories | 717 kcal | 884 kcal |
| Protein | 0.9 g | 0 g |
| Carbs | 0.1 g | 0 g |
| Fat | 81.1 g | 100 g |
| Fiber | 0 g | 0 g |
Butter wins on both: fewer calories and more protein per 100 g.
Both columns are USDA FoodData Central numbers — the same sourced data Joules logs from, rather than the crowd-sourced entries that make many trackers disagree with each other.
Per 100 g, Butter has 717 calories and Olive oil has 884. Butter is lower by 167 kcal. Compare per 100 g first, then scale to your actual portion.
Per 100 g, Butter has 0.9 g of protein and Olive oil has 0 g. Butter has 0.9 g more.
Neither is off-limits. Fewer calories per 100 g gives you more room in a deficit, but portion size and the rest of your day matter more than the swap itself. Log whichever you actually eat and watch your daily total.
Both foods come from USDA FoodData Central (SR Legacy): FDC ID 173410 for Butter and 171413 for Olive oil, taken per 100 g so the comparison is like-for-like.
Snap a photo of Butter or Olive oil in Joules and the calories and macros are logged for you — from the same USDA data.
Get JoulesA note on accuracy: calculators like this one provide estimates based on population-level formulas — your real needs vary with genetics, muscle mass, medical conditions, and more. Results are for information only and are not medical advice, a diagnosis, or a prescription. Talk to a doctor or registered dietitian before making significant changes to your diet or exercise, especially if you have a health condition, are pregnant, or are under 18.
Nutrition data: USDA FoodData Central, FDC ID 173410 · FDC ID 171413 (SR Legacy), per 100 g. Both entries are compared on the same basis.
