How to count calories when you eat out (without ruining the meal)

Cooking at home, you can weigh things and read labels. Then a friend's birthday, a work lunch or a Friday takeaway comes along and you have no idea what's on the plate. So you either skip logging, or you skip the meal. Neither is a good long-term plan.

The goal when you eat out isn't to be exact. It's to be roughly right. Here's how.

1. Check if the calories are already written down

Many big chains have to show calories. In the US, restaurant chains with 20 or more locations must list calories on their menus. In England, large food businesses have had to show calories on menus since April 2022. Many other chains publish nutrition information on their website or app.

If the number exists, use it. It won't be perfect, but it's better than a guess.

2. Break the plate into parts

A plate is easier to estimate when you split it up: the protein (chicken, beef, fish, eggs, beans), the carb (rice, chips, bread, pasta), the fat (oil, butter, cheese, sauce) and the extras (drinks, dessert, sides). Estimate each one on its own, then add them up.

3. Use your hand as a measuring tool

Your hand goes everywhere with you. These are rough guides, but they're surprisingly useful:

• Your palm (thickness and size) ≈ one portion of meat or fish, about 100 to 120 g cooked.
• Your closed fist ≈ one cup of rice, pasta or cereal.
• Your cupped hand ≈ a small handful of nuts or snacks.
• Your thumb ≈ a tablespoon of butter, oil, peanut butter or dressing.

4. Assume extra oil, because there almost always is

Restaurant food tastes great partly because it's cooked with more oil and butter than you'd use at home. One tablespoon of oil is about 120 calories, and butter is about 100. If the food looks glossy, fried or creamy, add one to two tablespoons of fat to your estimate, which is about 120 to 240 calories. It's the most common thing people forget.

5. Count the drinks

Drinks can add as much as a whole meal. A 330 ml can of regular cola is around 140 calories, and a regular 330 ml beer is about 140 to 150. Cocktails, milkshakes, sweet coffees and juices are often 200 to 500 calories each. Water, sparkling water, black coffee, plain tea and diet drinks are your easy wins.

6. Log a range, not a perfect number

You'll never know if that pasta was 650 or 720 calories, and it doesn't matter. Log a sensible range, like 650 to 800, and move on. Being consistently roughly right over a whole week beats being perfectly accurate on the days you cook and not logging at all on the days you don't.

7. Plan the rest of the day around it

If you know you're going out for dinner, keep breakfast and lunch lighter and higher in protein: eggs, yogurt, lean meat, vegetables. That leaves room for the meal you actually care about, and the protein stops you arriving starving and ordering everything.

8. One big meal won't ruin your progress

Fat loss happens over weeks, not single meals. One heavy dinner might put your weight up the next morning, but that's mostly water and salt from the food. Log it, go back to normal at the next meal, and look at your weekly average.

A worked example

Say you had a burger, fries and a cola at a casual restaurant with no calories on the menu:

• Burger: a bun (~200), a beef patty about the size of your palm (~250), cheese and sauce (~150) = about 600
• Fries: a medium portion, about two fists = around 350 to 450
• Cola: 330 ml can = about 140
• Total: roughly 1,100 to 1,200 calories

Is that exact? No. Is it close enough to keep your week on track? Yes. That's the whole game.

The short version

• Use posted calories when you can find them.
• Split the plate into protein, carbs, fat and extras, and use your hand to judge portions.
• Add one to two tablespoons of oil for anything fried, glossy or creamy.
• Count drinks, log a range, and judge your progress by the week.

Breaking a restaurant plate into parts is exactly what AIMS does for you. Snap a photo or type "burger, fries and a coke", and it splits the meal into items you can tweak, with a calorie range for each.