How Many Calories in Peanut Butter? Official USDA Numbers

Two level tablespoons of smooth peanut butter is about 191 calories with 7.1g of protein and 16.4g of fat, by USDA FoodData Central figures. Reduced-fat peanut butter, by USDA's own serving weights, lands at about 187 calories, a saving of roughly four calories per serving. Peanut butter is reliably mislogged, and the reason is not the label. It is the spoon.

Official USDA numbers

Smooth peanut butter with salt (598 calories per 100g):

Portion	Weight	Calories	Protein	Fat	Carbs
1 tbsp	16g	96	3.6g	8.2g	3.6g
2 tbsp (USDA serving)	32g	191	7.1g	16.4g	7.1g
1 cup	258g	1,543	57.3g	132.5g	57.6g

By style, all at USDA's 2-tablespoon serving:

Style	Serving weight	Calories	Protein	Fat	Fiber
Smooth, with salt	32g	191	7.1g	16.4g	1.6g
Chunky, with salt	32g	188	7.7g	16.0g	2.6g
Reduced fat	36g	187	9.3g	12.2g	1.9g

Salted and unsalted are identical in calories. USDA lists smooth peanut butter with salt and without salt at the same 598 per 100g, differing only in sodium, 426mg versus 17mg.

The reduced-fat trap, in USDA's own numbers

This is the most useful thing on this page. Reduced-fat peanut butter is genuinely lower in fat, 34g per 100g against 51.4g, and genuinely lower in calories per 100g, 520 against 598. It still saves you almost nothing, for two compounding reasons.

First, the fat that comes out gets replaced. Carbohydrates go from 22.3g per 100g to 35.7g, because the recipe needs bulk and sweeteners to stay spreadable and palatable. Second, and this is the part nobody notices, USDA's serving weight for reduced fat is heavier: 36 grams for two tablespoons against 32 grams for regular, because the product is denser.

Run the arithmetic on the serving you actually eat: 520 x 0.36 = 187 calories, against 598 x 0.32 = 191. Four calories. You give up 4.2g of fat, take on 5.7g of carbs, and gain 2.2g of protein. That is a macro trade, and a reasonable one if you want the protein, but it is not a calorie saving, and the jar is priced and marketed as though it were.

The spoon is the real variable

Every number above assumes a level tablespoon. Almost nobody eats a level tablespoon of peanut butter. A heaped spoonful is commonly 1.5 to 2 times a level one, which means the honest range for "a spoonful of peanut butter" is roughly 96 to 190 calories for what people describe with the same two words. At 598 calories per 100g, peanut butter is nearly six calories per gram, so small errors in the scoop are large errors in the log. A 10-gram overshoot is 60 calories, and it happens silently.

This makes peanut butter the clearest example of the invisible-calorie problem we cover in Common Food Logging Mistakes. It is also why it deserves a real strategy rather than a guess.

Two things that work. Weigh the jar rather than the spoon: put the jar on a scale, take what you want, weigh it again, and the difference is your exact grams. Or standardize the spoon the way you would standardize any measurement, same spoon and same level every time, so at least your error is consistent and your trend stays readable.

For what it is worth as a food, peanut butter earns its place. It carries 7.1g of protein per serving, real fiber, and the satiety that comes with 16g of fat, which is why it works well in the protein-first framework from How to Track Macros. The issue was never that it is unhealthy. The issue is that it is dense enough to erase a deficit while feeling like a condiment.

What my own log taught me about this jar

Peanut butter is the food that convinced me photo-based logging could not work for me. A spoon of it in a bowl of oats is a brown smear. It looks the same at 15 grams and at 40 grams, and the difference is 150 calories, which is a meaningful fraction of a day. No camera reads that, and neither does a database entry, because the entry is correct and my scoop was the thing that was wrong.

What fixed it was describing it honestly instead of precisely. In Nouri I write "oats with a big spoonful of peanut butter" when it is a big spoonful, and "a level tablespoon" when I actually leveled it, and the estimate moves accordingly. The breakdown then shows me the peanut butter as its own line with its own calories, which is how I learned that my "one spoon" habit was routinely a two-serving habit. Seeing 191 next to the word peanut butter every morning changed the spoon faster than any rule would have. Nouri is iPhone (iOS only), and there is a free trial if you want to try the same experiment on your own jar.

Nouri does take photos, and they are useful for a full plate, but for this jar the words are the data. The quickest version for me is Siri: "Hey Siri, track food in Nouri," then "toast with a big spoonful of peanut butter," said with the phone still locked and a knife in my other hand.

Those spoonfuls add up quietly, which is what the Sunday Nouri Report is for: average fat and calories against my targets, days on target for my goal, and the slip worth fixing next week, even when it is a jar.

FAQ

How many calories in 2 tablespoons of peanut butter?

About 191 calories, with 7.1g of protein and 16.4g of fat, using USDA's serving weight of 32 grams for two level tablespoons.

How many calories in 1 tablespoon of peanut butter?

About 96 calories. Peanut butter runs close to six calories per gram, so a heaped spoon can easily reach 150.

Is reduced-fat peanut butter lower in calories?

Barely. By USDA's own serving weights it is about 187 calories against 191 for regular, because the removed fat is replaced with carbohydrate and the serving weight is heavier. It does deliver more protein, 9.3g against 7.1g.

How much protein is in peanut butter?

About 7.1g per two-tablespoon serving of smooth, or 7.7g for chunky. That is useful but not enough to call it a protein food, since the same serving carries 16g of fat.

How many calories in a cup of peanut butter?

About 1,543 calories, with 132.5g of fat. This is worth knowing before baking, since a single batch of cookies can carry a full day of calories in the peanut butter alone.

Is peanut butter good for weight loss?

It can be, because protein and fat are satiating, but it is dense enough to undo a deficit if it is not measured. See Calorie Counting 101 for the target it has to fit inside.

Is natural peanut butter lower in calories?

No, not meaningfully. Peanuts themselves are the calories, and USDA lists dry-roasted peanuts at 587 per 100g, close to the 598 of peanut butter. Natural versions differ in added sugar and oil, not in energy density.

Does chunky peanut butter have fewer calories than smooth?

Essentially the same, 188 against 191 per two-tablespoon serving. Chunky carries more fiber, 2.6g against 1.6g.

How many calories in a peanut butter sandwich?

About 345 using verified components: two slices of white bread at 77 each by USDA slice weights, plus 191 for two tablespoons of peanut butter. Jam or jelly adds about 56 per tablespoon, USDA's tablespoon being 20g.

How do I measure peanut butter accurately?

Weigh the jar before and after, and the difference is your grams. It is faster than scraping a measuring spoon and removes the level-versus-heaped problem entirely.

Does salted peanut butter have more calories?

No. USDA lists salted and unsalted smooth peanut butter identically at 598 calories per 100g. The difference is sodium, 426mg against 17mg.

How many calories in peanut butter on toast?

About 268 for one slice of white toast with two tablespoons, using 77 for the slice and 191 for the peanut butter. The spread is the larger half of that number, which is true of almost every peanut butter meal.

What is the easiest way to track calories in peanut butter?

Describe the spoon the way it really was, "a heaped spoonful on toast," by typing it into Nouri or saying it to Siri. The calories and macros come back instantly with the peanut butter on its own line and the reasoning visible, and the weekly Nouri Report shows what all those spoonfuls did to your week.

Weigh the jar once, learn what your own spoon actually holds, and log it as a sentence in Nouri so the spread shows up as its own line instead of hiding inside "toast." The companion numbers are in our bread and oatmeal guides.

Sources

• USDA FoodData Central, SR Legacy: Peanut butter, smooth style, with salt (FDC 174266); Peanut butter, chunk style, with salt (FDC 174265); Peanut butter, smooth, reduced fat (FDC 172458); Peanut butter, smooth style, without salt (FDC 172470); Peanuts, all types, dry-roasted, without salt (FDC 173806), fdc.nal.usda.gov (checked September 27, 2026)
• USDA FoodData Central, SR Legacy: Jams and preserves (FDC 169641), for the jelly figure (checked September 27, 2026)
• Serving weights are USDA's own household measures, including the 32g and 36g two-tablespoon weights that drive the reduced-fat comparison
• Bread figures from our bread guide, also USDA-sourced