Calories in Peanut Butter
Peanut butter contains 588 kcal per 100g — very calorie-dense. A typical 2 Tbsp serving (32g) is 188 kcal with 7g of protein and 8g of carbs.
Nutrition by portion size
| Portion | kcal | Carbs (g) | Protein (g) | Fat (g) | Fiber (g) |
|---|---|---|---|---|---|
| 1 Tbsp peanut butter (16g) | 94 | 4 | 3.5 | 8 | 1 |
| 2 Tbsp peanut butter (32g) | 188 | 8 | 7 | 16 | 2 |
| 100g peanut butter | 588 | 24 | 22 | 50 | 6 |
| 1 tsp peanut butter (5g) | 29 | 1.2 | 1.1 | 2.5 | 0.3 |
| 1/4 cup peanut butter (~64g) | 376 | 16 | 14 | 32 | 4 |
Per 100g — variant comparison
| Variant | kcal | Carbs (g) | Protein (g) | Fat (g) | Fiber (g) |
|---|---|---|---|---|---|
| Smooth (regular) | 588 | 24 | 22 | 50 | 6 |
| Crunchy (regular) | 593 | 22 | 25 | 51 | 6.5 |
| Reduced fat | 520 | 35 | 25 | 36 | 6 |
| Natural (no added sugar/oil) | 580 | 20 | 25 | 50 | 8 |
| Powdered peanut butter (mixed) | 333 | 33 | 33 | 11 | 11 |
About these numbers
Peanut butter is calorie-dense by design — 50g of fat per 100g — but the fat is primarily monounsaturated (oleic acid), the same cardioprotective fat as olive oil. Per 2 Tbsp serving (the standard), it delivers 7g of protein, 8g of carbs, 2g of fiber, and meaningful magnesium, niacin, vitamin E, and folate. The 2017 Hou et al. meta-analysis of 22 cohort studies (n=900,000+) found peanut butter consumption was associated with reduced cardiovascular disease and all-cause mortality at moderate intakes.
The portion-control challenge is real. A heaping tablespoon often weighs closer to 25g than the labelled 16g — a 50% calorie underestimation that adds up over a daily PB habit. For weight loss specifically, measuring by spoon and erring on the small side is the practical workflow. Powdered peanut butter (defatted PB blended back with water) provides similar protein at half the calories, useful when calorie targets are tight.
Use the calculators
- Calorie Deficit Calculator — find how this portion fits your daily target
- Glycemic Load Calculator — compute exact GL for any serving size
- Macro Calculator — set protein, carb, fat splits for cut/maintain/bulk
- Net Carbs Calculator — useful for keto and T1D insulin dosing
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Frequently asked questions
- How many calories are in peanut butter?
- A standard 2 Tbsp serving (32g) of regular peanut butter contains approximately 188 kcal with 7g protein, 8g carbs, and 16g fat. Per 100g, peanut butter is 588 kcal — among the most calorie-dense common foods. The biggest tracking pitfall is portion underestimation: a "heaping" tablespoon usually weighs 22–28g, not the labelled 16g.
- Is peanut butter good for weight loss?
- Yes, in controlled portions. Despite the calorie density, peanut butter is weight-neutral in most observational studies and has high satiety per calorie due to fat + protein + fiber. The 2017 Hou et al. meta-analysis found peanut butter consumption was associated with reduced obesity risk despite the calories. For weight loss specifically: measure portions strictly (use a spoon, not eyeballing), pick natural varieties without added sugar/oil, and consider powdered PB when calorie targets are very tight.
- Natural or regular peanut butter — which is better?
- Natural (no added sugar/oil) is generally better. Regular peanut butters often contain 1–2g added sugar per serving and partially hydrogenated oils. Natural versions are essentially just ground peanuts with maybe a pinch of salt. Nutritionally similar calorie/macro profile but cleaner ingredient list. The catch: natural separates and requires stirring. For most adults, the choice is largely preference; for tight diabetes/cardiovascular optimisation, natural wins.
- What's powdered peanut butter and is it worth it?
- Powdered peanut butter is defatted ground peanuts — the protein and flavour are preserved while ~75% of the fat (and calories) are removed. When mixed with water, you get a peanut butter-like spread at ~50 kcal per 2 Tbsp serving vs 188 kcal for regular. The macronutrient profile shifts dramatically (more protein-dense, far less fat). For weight loss and protein-focused eating, powdered PB is genuinely useful. For baking and recipes where the fat content matters, regular PB still wins.
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