How Many Calories Are There In A McDonald’s Fish Sandwich? | Quick Facts Guide

Calories In McDonald’s Fish Sandwich: Sizes, Builds, And Quick Ranges

McDonald’s sells two core fish sandwiches in the United States: the Filet-O-Fish and the Double Filet-O-Fish. The base sandwich carries a crispy pollock patty, half a slice of American cheese, and tartar sauce on a steamed bun. The double uses two patties and the same toppings. On paper, that jump from one patty to two is the biggest swing in calories you’ll see on the menu.

Here’s the headline math: McDonald’s lists Filet-O-Fish at 380 calories and the Double Filet-O-Fish at 530 calories. Regional sites show small variations due to recipes and regulations, but the pattern is the same—single sits in the high 300s, double lands in the 500s.

Item	Calories	Notes
Filet-O-Fish (US)	380	Single patty, tartar sauce, half slice cheese.
Double Filet-O-Fish (US)	530	Two patties, tartar sauce, cheese.
Filet-O-Fish Meal*	~950	Medium fries + medium soft drink per McDonald’s sample meal.
Filet-O-Fish (Canada)	400	Small regional variance.
Double Filet-O-Fish (Canada)	560	Listed on the Canadian menu.
Double Filet-O-Fish (UK)	453 kcal	Different recipe and label system.

*Meals vary with drink choice and fries size; McDonald’s shows a 950-calorie example with medium fries and a medium drink.

If you’re budgeting your day, calories are only part of the call. Protein, fat, and sodium matter for fullness and balance. Pollock is a lean fish, so much of the energy in this sandwich comes from the bun, tartar sauce, and cheese. That’s why simple swaps change the count fast.

What Drives The Calories In A Filet-O-Fish

Start with the patty. Wild-caught Alaskan pollock is light in calories and high in protein when cooked. The crispy coating and the toppings do the heavy lifting on energy. The steamed bun adds more carbs than the fish itself, while the tartar sauce and cheese push fat and sodium upward. Those details explain why a no-sauce build trims more than a no-bun experiment on similar sandwiches across regions.

Want an easy way to plan the rest of your day around this sandwich? Set your daily calorie needs first, then fit the fish sandwich where it makes sense. That single line keeps your totals steady without turning lunch into math class.

Official Nutrition Sources You Can Trust

For precise numbers and allergens in your location, open McDonald’s item pages or the Nutrition Calculator. The company updates those pages when recipes or serving sizes change. Checking the brand page for the Filet-O-Fish and using the calculator side by side gives you reliable totals and helps you preview edits like no sauce or extra cheese before you order.

Customize The McDonald’s Fish Sandwich For Calories

You can lighten or load the Filet-O-Fish without feeling like you ordered a different meal. Small edits to sauces and cheese make the biggest swings. McDonald’s regional pages list per-component energy for tartar sauce and cheese slices, which lets you estimate changes with some confidence. Use the table below as a guide.

Customization	Calorie Change	Reason
No tartar sauce	−40 kcal	Regional pages list ~40 kcal per tartar serving.
Extra tartar sauce	+40 kcal	Extra serving adds another ~40 kcal.
No cheese	−48 kcal	Half slice of processed cheese is ~48 kcal.
Extra cheese	+48 kcal	One more half slice adds ~48 kcal.
Swap double patty	+150 kcal	Jump from single to double increases patties and coating.

These are menu-based estimates. They track closely across the UK, Ireland, and other regional sites that publish per-component values. The US pages show totals for the build, while the nutrition calculator lets you add or remove ingredients to see the difference live.

Calories In McDonald’s Fish Sandwich By Situation

Solo Sandwich At Lunch

The single Filet-O-Fish at 380 calories can sit comfortably in a midday window if your day lands near 1,900–2,200 calories. Pair it with water or a diet drink and you’ll keep room for a balanced dinner.

Double Patty For A Bigger Meal

The Double Filet-O-Fish brings you to 530 calories before sides. That suits a higher intake day or a post-workout plan where you want more energy fast.

Full Combo Meal

Pick medium fries and a medium soft drink and the meal lands near 950 calories in McDonald’s own sample build. That’s a big slice of a typical daily budget, so many folks downsize the drink or skip sauce to save room for snacks later.

Nutrition Snapshot Beyond Calories

Calories answer the headline question, but macros shape fullness. The Filet-O-Fish delivers a solid dose of protein for its size because pollock is lean. Carbs come mainly from the bun, while fats come from the frying medium, tartar sauce, and the cheese.

Protein

Lean fish keeps protein high for the calorie count. That helps with satiety at lunch. If you’re chasing a protein target, the Double Filet-O-Fish boosts the grams without doubling sauce.

Fat And Sodium

Tartar sauce and cheese lift fat. The coating and condiments raise sodium more than the fish itself. If those numbers matter for you, a no-sauce, no-cheese build is the simplest fix.

Carbohydrates

The steamed bun is the main driver here. If you plan fries too, spread the rest of your day toward fiber-rich sides to steady the macros.

Ingredient Notes And Allergens

The fish patty uses Alaskan pollock. The coating contains wheat. The bun contains wheat. The tartar sauce contains egg. The cheese contains dairy. Cross-contact can occur in shared kitchens. If any of these are concerns, read the local allergen page and order with care. Menu teams adjust recipes over time, so checking your city’s live menu before you buy is the best move.

If you want the taste with fewer triggers, start with no sauce and keep the half slice of cheese. That trims egg while keeping texture and salt. You can also ask for light sauce, which keeps flavor while shaving a small amount of energy and fat.

How This Compares To Other Fast-Food Fish Sandwiches

Across chains, fish sandwiches cluster between the mid-300s and mid-600s calories. The Filet-O-Fish sits near the lower end as a single and in the middle as a double. Sauce style and bun size create most of the spread you see from brand to brand.

Smart Ordering Tips For Calorie Targets

Trim Where It Counts

Skip the sauce or skip the cheese to drop 40–50 calories without changing the taste profile too much. If you like both, ask for light sauce and keep the cheese. That often lands within a 20–30 calorie savings while keeping the classic bite.

Balance The Meal

Pair the sandwich with water, a no-calorie drink, or a small coffee. Add a side salad at home or round out the day with fiber-rich veggies to steady the macros.

Use The Calculator

McDonald’s Nutrition Calculator lets you toggle ingredients and sizes. It’s handy when you’re planning for a team lunch or a road stop and want a quick check.

Frequently Asked Build Questions

Is The Cheese A Half Slice?

Yes. That’s why the calorie impact looks smaller than a full slice would. The listed change aligns with the half-slice portion on regional pages.

Does Extra Sauce Change Macros A Lot?

It adds fat and sodium along with the calories. If you like the tang, a light spread nails the taste with less energy than a full extra portion.

What About Seasonal Or Regional Fish Sandwiches?

When menus rotate or regions use different fish, the totals shift a bit. Always check the local item page for your city, especially during Lent or limited runs.

Where The Numbers Come From

Totals in this article trace back to McDonald’s public item pages and the Nutrition Calculator for the US market, with cross-checks against regional pages that list per-component energy. For the fish itself, neutral databases show how lean cooked pollock is, which explains why toppings drive most of the swing. That blend of brand data and neutral nutrient tables keeps the answer accurate and easy to apply.

Want a deeper read next? You might like our calories and weight loss guide for a step-by-step primer that pairs well with quick menu math.

Bottom Line On Calories

Single is 380; double is 530. Sauce or cheese moves about 40–50 calories. Match sides to your target and enjoy the sandwich you planned today.