Lemon bar calories come to 166 for one medium 38 g bar and 437 per 100 g. The number to notice is sugar: a medium bar carries 16 g of it, and carbs plus fat supply almost all of the energy while protein sits at just 5% of the calories. Bar size swings the total more than anything else.
166kcal
1 medium bar · 38 g, baked cookie bar
5%protein
1.9 gProtein
24 gCarbs
7.2 gFat
How to burn off 166 kcal
—Walking, brisk
—Jogging
—Cycling, moderate
—Swimming
Skip the math. BodyPal counts these calories from your steps and workouts automatically.
Nutrition facts
Baked cookie bar · per 38 g
Calories
166 kcal
Protein
1.9 g
Carbohydrate
24 g
Fat
7.2 g
Saturated fat
1.4 g
Cholesterol
29 mg
Sodium
85 mg
Potassium
27 mg
Iron
0.7 mg
Source: USDA FoodData Central
🛡️
Verified nutrition data
Numbers on this page come from USDA FoodData Central, the U.S. Department of Agriculture’s food composition database, and from manufacturer labels where a branded product is named. Last verified September 2026. How we verify our data →
Lemon bar: calories, protein and sodium by serving
Percent of daily value uses the FDA reference of 2,000 kcal a day.
Serving
kcal
Protein
Carbs
Fat
Sodium
% DV kcal
1 medium (38 g)
166
1.9 g
23.8 g
7.2 g
85 mg
8%
1 large (56 g)
245
2.9 g
35.1 g
10.6 g
125 mg
12%
1 small (25 g)
109
1.3 g
15.7 g
4.7 g
56 mg
5%
100 g
437
5.1 g
62.7 g
18.9 g
224 mg
22%
3 × 1 medium (38 g)
498
5.8 g
255 mg
5 × 1 medium (38 g)
830
9.7 g
426 mg
Bar size swings the total from 109 to 245
A lemon bar has no standard size, so the number on your plate depends on how the pan was cut. A small 25 g square is 109 calories, a medium 38 g bar is 166, and a large 56 g bar is 245. That large bar is 12% of the daily calorie value, against 8% for the medium and 5% for the small.
The bigger risk is the second piece. Two medium bars add up to 332 calories, three reach 498, and five come to 830 for 190 g of dessert. Lemon bars are small, soft and easy to eat in a row, and the total climbs faster than the plate suggests.
If you are tracking, weigh one bar from the batch once and use that size for the rest. Homemade pans often get cut into generous pieces, and logging a medium bar when you actually ate a large one leaves a real gap in your count. A kitchen scale settles it in seconds.
Carbs bring 57% of the calories and fat 39%
Per 100 g, a lemon bar holds 62.7 g of carbs, 18.9 g of fat and only 5.1 g of protein. Converted to energy, carbs supply 57% of the calories, fat 39% and protein just 5%. This is a dessert built on sugar and fat, and the split shows it plainly.
Protein barely registers. A medium bar has 1.9 g, which is 4% of the daily value, and even five medium bars only reach 9.7 g. Fiber is just as thin at 0.3 g per medium bar and 0.8 g per 100 g, so there is little in the bar to keep you full.
Fat is the quieter contributor. A medium bar carries 7.2 g of fat and a large one 10.6 g. Saturated fat is 3.8 g per 100 g against a daily value of 20 g, and cholesterol is 75 mg per 100 g against a daily value of 300 mg. Neither is extreme for one bar, but both stack up across several.
Sugar is the row to watch, not sodium
Sugar makes up 42.1 g of every 100 g of lemon bar. That is 16 g in a medium bar, 23.6 g in a large one and 10.5 g in a small square. Most of the 23.8 g of carbs in a medium bar is sugar, which is why the tart flavor fools people: it tastes lighter than it is.
Sodium is not the problem here. A medium bar has 85 mg, 4% of the 2300 mg daily value, and a large bar has 125 mg, or 5%. Potassium is low as well, at 71 mg per 100 g, so the bar adds little on either side of that balance.
If you watch sugar, the small square is the practical choice. It keeps sugar near 10.5 g and calories at 109 while still giving you the full lemon-curd taste. Cutting the pan into smaller squares is the easiest fix, because nobody feels shortchanged by a neat little piece.
One bar fits a day; a plate of them does not
A single medium lemon bar at 166 calories fits into most days as a planned dessert. The catch is that it brings almost nothing besides energy: 1.9 g of protein and 0.3 g of fiber. Treat it as dessert, not as a snack that will hold you over until dinner.
Context helps. Eaten after a meal with protein and vegetables, a bar closes the meal instead of starting a grazing session. With coffee or tea and nothing else, it is easy to reach for a second, which takes you to 332 calories before you notice.
Packaged versions from Fiber One, Atkins or Larabar are built differently from a bakery-style bar, so read their own labels rather than borrowing the numbers here. If you would rather not weigh anything, BodyPal can log a lemon bar from a photo.
How does lemon bar compare?
Here is how a lemon bar stacks up against a brownie bite, a Biscoff cookie and a Snickers bar, per 100 g and per usual serving.
Verdict: Per 100 g the lemon bar at 437 calories is lighter than a Snickers bar at 491 or a Biscoff cookie at 514, and only the brownie bite at 405 comes in lower. For the smallest hit pick a Biscoff cookie at 61 or a brownie bite at 113; if you want a full-size treat, a medium lemon bar at 166 beats a Snickers bar at 280.
Most popular lemon bar brands in the United States
Ranked by popularity in the BodyPal database
# Productkcal / 100 g
1Larabar Lemon Bar Mini Fruit and Nut Bar1 bar · 22 g437 kcal
Most packaged lemon bars are fruit, fiber or protein snack bars rather than a bakery lemon square, so their per-gram numbers run lower. Source: manufacturer labels / USDA FoodData Central.
Lemon bar FAQs
How many calories are in one lemon bar?
A medium lemon bar of 38 g has about 166 calories. A small 25 g bar is 109 calories and a large 56 g bar is 245.
Is a lemon bar good for weight loss?
One medium bar is 166 calories with 16 g of sugar, 2.0 g of protein and 0.3 g of fiber. It is a dessert-sized portion rather than a filling snack.
Lemon bar vs Snickers bar: which has more calories?
Per 100 g a lemon bar is 437 calories and a Snickers bar is 491, so the candy bar is denser. A medium 38 g lemon bar comes to 166 calories.
How much sugar is in a lemon bar?
A lemon bar has 42.1 g of sugar per 100 g, which works out to about 16 g in a medium 38 g bar and 24 g in a large 56 g bar.
How many carbs are in a lemon bar?
A medium 38 g lemon bar has 23.8 g of carbs, and 16 g of that is sugar. A large 56 g bar has 35.1 g and a small 25 g square has 15.7 g. Per 100 g the figure is 62.7 g.
How many calories are in a lemon bar square?
A small 25 g lemon bar square has 109 calories. A medium 38 g piece has 166 and a large 56 g piece has 245, so how big you cut the pan decides the count.
What are the nutrition facts for a lemon bar?
Per 100 g, a lemon bar has 437 calories, 62.7 g carbs, 18.9 g fat, 5.1 g protein, 42.1 g sugars and 224 mg sodium. A medium 38 g bar has 166 calories, 7.2 g fat and 1.9 g protein.
How many calories are in two lemon bars?
Two medium lemon bars have 332 calories. Three come to 498 and five reach 830, so a second or third bar adds up faster than the small size suggests.
How much fat is in a lemon bar?
A medium lemon bar has 7.2 g of fat, and fat supplies 39% of its calories. A large bar has 10.6 g and a small one 4.7 g. Saturated fat is 3.8 g per 100 g.
