A quesadilla has few moving parts: a tortilla, cheese, the fat in the pan and sometimes a filling. That makes it easy to count, as long as you know how big the tortilla is and how much cheese went in. USDA's numbers give a baseline, and the home-built math further down shows how a quesadilla grows past 600 calories.
Quick answer: a cheese quesadilla (4.2 oz) has about 379 calories according to USDA, about 95 per quarter wedge. A chicken quesadilla (4.9 oz) has about 402, or 100 a wedge.
Quesadilla calories by filling
USDA weighs a whole quesadilla at 4.2 to 5.6 oz, depending on the filling, and a triangular piece at a quarter of that. Here is each one whole and by the wedge:
Quesadilla | Whole | Calories (whole) | Calories (1 wedge) | Protein (whole) | Sodium (whole) |
|---|---|---|---|---|---|
Egg | 4.9 oz (140 g) | 349 | 87 | 15.3 g | 658 mg |
Vegetables | 4.9 oz (140 g) | 354 | 89 | 11.4 g | 734 mg |
Cheese only | 4.2 oz (120 g) | 379 | 95 | 16.0 g | 811 mg |
Chicken | 4.9 oz (140 g) | 402 | 100 | 20.2 g | 841 mg |
Beef or pork | 4.9 oz (140 g) | 427 | 107 | 19.7 g | 840 mg |
Chicken and vegetables | 5.6 oz (160 g) | 432 | 108 | 18.1 g | 947 mg |
Beef or pork and vegetables | 5.6 oz (160 g) | 446 | 112 | 17.8 g | 947 mg |
Source: USDA FoodData Central (FNDDS). A wedge is one triangular piece, a quarter of the whole.
The cheese-only quesadilla is the smallest here but the richest per ounce: 316 calories per 100 g and about 10 g of saturated fat, half of the 20 g Daily Value. Adding chicken or vegetables dilutes the cheese, so those versions have fewer calories per ounce, but they come out heavier overall because the whole quesadilla weighs more. Every quesadilla in the table has more than 650 mg of sodium.

Tortilla plus cheese: where the calories come from
A home-made quesadilla is easy to add up from its parts. A cheese quesadilla on a large flour tortilla, folded in half and cooked in butter:
Large flour tortilla (2.5 oz, 71 g): 217 calories
Shredded cheddar, 1/2 cup: 231 calories
Butter for the pan, 1 tsp: 35 calories
Total: about 483 calories, with 19 g of protein and about 15 g of saturated fat
Add 3 oz of grilled chicken breast (150 calories) and the same quesadilla comes to about 633, with 44 g of protein. Cooking it in 1 tbsp of butter instead of 1 tsp adds about 70 more.
Source: USDA FoodData Central (FNDDS): flour tortilla, Cheddar cheese, butter, grilled chicken breast.
The tortilla and the cheese carry almost the whole number, so those are the two dials to turn. A medium flour tortilla (1.6 oz) has 138 calories, 79 fewer than a large one; the shell comparison in our guide to taco calories covers corn and whole wheat too. The cheese is the bigger dial:
Cheese, shredded | 1/2 cup | 1/4 cup |
|---|---|---|
Cheddar | 231 | 116 |
Monterey Jack | 221 | 111 |
Mexican blend | 205 | 102 |
Reduced-fat cheddar | 179 | 89 |
Queso asadero | 168 | 84 |
Mozzarella, part skim | 167 | 84 |
Reduced-fat Mexican blend | 159 | 80 |
Source: USDA FoodData Central (FNDDS).
Swapping cheddar for part-skim mozzarella at the same half cup saves 64 calories and keeps the protein, about 13 g either way. Cutting the cheese from half a cup to a quarter cup saves more, 83 to 116 calories depending on the cheese.

Dips and frozen quesadillas
What goes on the side can add more than half a wedge. Per 2 tbsp, according to USDA:
Pico de gallo: 5 calories
Red salsa: 11 calories
Guacamole: 46 calories
Queso (cheese dip): 49 calories
Sour cream: 59 calories
Salsa and pico de gallo keep the extra close to zero; 2 tbsp of sour cream adds about two-thirds of a cheese wedge.
Frozen quesadillas list one piece as a serving, at about 4 oz. Two chicken quesadillas reported to USDA's branded database list 270 calories (505 Southwestern) and 350 calories (Comida del Sol) for 4 oz, each with 16 g of protein and 690 mg of sodium. At the same weight, USDA's chicken quesadilla comes to about 324 calories and 16 g of protein, so the frozen ones land in the same range.
A lighter chicken quesadilla, one change at a time
Start from the 633-calorie chicken quesadilla above (large flour tortilla, 1/2 cup cheddar, 3 oz chicken, 1 tsp butter) and make one change at a time:
Use a medium flour tortilla instead of a large one: 554 calories.
Swap the cheddar for part-skim mozzarella: 490 calories.
Use 1/4 cup of cheese instead of 1/2 cup: 407 calories.
Cook it in a dry nonstick pan instead of butter: 372 calories.
Add 1/2 cup of cooked bell peppers: 408 calories, with more volume on the plate.
Source: USDA FoodData Central (FNDDS); calories worked out from the values above.
The lighter version keeps the 3 oz of chicken, so protein stays at about 36 g while the calories drop by about 225. Serve it with salsa instead of sour cream and the gap grows by another 48. Protein holds up because the cheese, not the chicken, is what gets trimmed, which matters if you are tracking macros and not just calories.
A folded quesadilla hides most of what is inside, so a photo alone can miss the cheese. With the Dietfit app, you can log it by typing what went in, or edit the ingredients after a photo scan, so the half cup of cheese and the butter in the pan make it into the log. For where quesadillas sit next to tacos, burritos and enchiladas, see whether Mexican food is healthy.
FAQ
How many calories are in a cheese quesadilla?
A cheese quesadilla (4.2 oz) has about 379 calories and 16 g of protein, according to USDA. Made at home on a large flour tortilla with 1/2 cup of cheddar and 1 tsp of butter, it comes to about 483.
How many calories are in a chicken quesadilla?
A chicken quesadilla (4.9 oz) has about 402 calories and 20 g of protein, according to USDA. A larger home-made one with 3 oz of chicken, 1/2 cup of cheddar and a large flour tortilla comes to about 633.
How many calories are in one slice of quesadilla?
One wedge, a quarter of the quesadilla, has about 87 to 112 calories depending on the filling, according to USDA: about 95 for cheese and 100 for chicken.
How many calories are in a beef or steak quesadilla?
A beef or pork quesadilla (4.9 oz) has about 427 calories and 20 g of protein, according to USDA, or about 446 with vegetables added.
Is a quesadilla healthy?
A quesadilla can fit a balanced diet, but most of its calories come from the tortilla and the cheese. A cheese quesadilla has about 10 g of saturated fat, half the 20 g Daily Value, and more than 800 mg of sodium. Adding chicken and vegetables and using less cheese improves the balance.
How can I make a quesadilla with fewer calories?
Use a medium tortilla, 1/4 cup of part-skim mozzarella instead of 1/2 cup of cheddar, and a dry nonstick pan. Those three changes take a 633-calorie chicken quesadilla to about 372, before adding vegetables.
References
https://fdc.nal.usda.gov/food-details/2708591/nutrients, FoodData Central, "Quesadilla, cheese only", FDC ID 2708591
https://fdc.nal.usda.gov/food-details/2708593/nutrients, FoodData Central, "Quesadilla, chicken", FDC ID 2708593
https://fdc.nal.usda.gov/food-details/2708592/nutrients, FoodData Central, "Quesadilla, beef or pork", FDC ID 2708592
https://fdc.nal.usda.gov/food-details/2708594/nutrients, FoodData Central, "Quesadilla, with vegetables", FDC ID 2708594
https://fdc.nal.usda.gov/food-details/2708596/nutrients, FoodData Central, "Quesadilla, chicken, with vegetables", FDC ID 2708596
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https://fdc.nal.usda.gov/food-details/2705710/nutrients, FoodData Central, "Cheese, Cheddar, reduced fat", FDC ID 2705710
https://fdc.nal.usda.gov/food-details/2705744/nutrients, FoodData Central, "Queso Asadero", FDC ID 2705744
https://fdc.nal.usda.gov/food-details/2705723/nutrients, FoodData Central, "Cheese, Mozzarella, part skim", FDC ID 2705723
https://fdc.nal.usda.gov/food-details/2710155/nutrients, FoodData Central, "Butter, stick", FDC ID 2710155
https://fdc.nal.usda.gov/food-details/2705968/nutrients, FoodData Central, "Chicken breast, grilled without sauce, skin not eaten", FDC ID 2705968
https://fdc.nal.usda.gov/food-details/2709976/nutrients, FoodData Central, "Peppers, green, cooked", FDC ID 2709976
https://fdc.nal.usda.gov/food-details/2709737/nutrients, FoodData Central, "Salsa, pico de gallo", FDC ID 2709737
https://fdc.nal.usda.gov/food-details/2709738/nutrients, FoodData Central, "Salsa, red", FDC ID 2709738
https://fdc.nal.usda.gov/food-details/2709307/nutrients, FoodData Central, "Guacamole, NFS", FDC ID 2709307
https://fdc.nal.usda.gov/food-details/2705786/nutrients, FoodData Central, "Cheese dip", FDC ID 2705786
https://fdc.nal.usda.gov/food-details/2705614/nutrients, FoodData Central, "Sour cream, regular", FDC ID 2705614
https://fdc.nal.usda.gov/food-details/1940403/nutrients, FoodData Central, "Chicken Quesadilla" (505 Southwestern, Flagship Food Group), FDC ID 1940403
https://fdc.nal.usda.gov/food-details/2074467/nutrients, FoodData Central, "Quesadillas, Chicken" (Comida del Sol, Flagship Food Group), FDC ID 2074467
https://www.fda.gov/food/nutrition-facts-label/daily-value-nutrition-and-supplement-facts-labels, "Daily Value on the Nutrition and Supplement Facts Labels", U.S. Food and Drug Administration