How to Calculate Calories and Macros in a Homemade Recipe

Packaged food comes with a nutrition label. The chili you made on Sunday does not. If you track calories or protein, homemade food is where the numbers go fuzzy, and the fuzz usually runs in one direction: low.

The fix is not complicated. It takes a kitchen scale, one free database and about five minutes per recipe. Below is the method, a calculator that does the arithmetic, and the three mistakes that throw most homemade numbers off by hundreds of calories.

The method in four steps#

1. 1

   Weigh every ingredient as it goes in

   Grams, raw, before cooking. Include the oil in the pan, the butter, the sauce and the cheese on top.
2. 2

   Look up each ingredient per 100 g

   From the package label, or from USDA FoodData Central for produce, meat and anything without a label. Match the state: raw values for raw weights.
3. 3

   Multiply and add up

   For each ingredient: grams divided by 100, times its calories, protein, carbs and fat. Add every row together for the whole recipe.
4. 4

   Divide by servings, or by cooked weight

   Equal portions: divide the totals by the number of servings. Unequal portions: weigh the finished dish and work per gram (more on that below).

Homemade recipe calorie and macro calculator#

The calculator is filled in with a real example: four honey soy chicken and rice bowls, using USDA values for every ingredient. Replace the rows with your own recipe. Every number is editable, and you can start from a blank table.

For this recipe, each of the four servings comes to about 608 calories with 47 grams of protein, 76 grams of carbs and 12 grams of fat. Notice where the calories come from: the dry rice carries almost half of them, and the two tablespoons of olive oil carry almost twice as many calories as the 400 grams of broccoli.

Mistake 1: mixing raw weights with cooked values#

This is the big one. Rice and pasta soak up water as they cook, so 100 grams of cooked rice holds far fewer calories than 100 grams of dry rice. Meat does the opposite: it loses water, so cooked chicken is denser in calories than raw. Weigh an ingredient in one state and look it up in the other, and the error is enormous.

The same mix-up with the chicken runs the other way: 680 grams of raw breast is about 816 calories, but logged against a roasted chicken entry (165 calories per 100 g) it shows up as roughly 1,120. Neither number is wrong on its own. The mistake is pairing a weight from one state with a value from the other.

Mistake 2: dividing by servings when portions are uneven#

"Serves 4" is a guess. If one person takes a big scoop and another a small one, dividing by four gives both of them the wrong number. Weighing the finished dish fixes that, and it is a step many tracking guides skip.

1. 1

   Weigh your empty pot or container first

   Write it on a piece of tape on the lid and you only ever do this once.
2. 2

   Weigh it again with the finished food

   Subtract the pot. Say the finished example dish weighs 1,900 g.
3. 3

   Work out calories per gram

   2,430 kcal in the recipe divided by 1,900 g is about 1.28 kcal per gram, or 128 per 100 g.
4. 4

   Weigh your portion

   A 450 g bowl is 450 times 1.28, about 576 kcal. Leftovers keep the same number per gram, so tomorrow’s lunch is just as easy.

The calculator does this automatically when you fill in the cooked weight and your portion. It also works for anything that is portioned unevenly: soups, casseroles, sheet pan dinners, a batch of overnight oats.

Mistake 3: forgetting what goes in the pan#

Cooking fat is the ingredient people forget most, because it never feels like food. But oil is pure fat at about 9 calories per gram, so it adds up faster than anything else in the recipe.

The other quiet additions

• Sauces and glazes: honey, sugar, maple syrup and bottled sauces add carbs that are easy to leave out.
• Toppings: cheese, nuts, avocado and a drizzle of dressing, added after the "recipe" is done.
• Cooking liquids that stay in: coconut milk and cream count; water and plain broth barely do.

Why your numbers won't match another app exactly#

Calories are estimated, not measured, almost everywhere. Most food values come from a system developed by Wilbur Atwater over a century ago, which assigns about 4 calories per gram to protein and carbohydrate and 9 to fat. Food databases refine those averages with factors specific to each food, and package labels may round. So two careful calculations of the same dish can differ by a few percent.

The calculator shows a check line for this: it compares the calories in your rows with the calories implied by your macros. A gap of a few percent is the system working as designed; a big gap almost always means a mistyped row. For more on how far to trust estimates in general, see nutrition estimates vs. package labels.

Doing this for recipes you save from videos and blogs#

Recipes from TikTok and Instagram rarely come with nutrition, and when a creator does list macros, the serving count is often vague. This is where the method pays off: the ingredient list and amounts are all you need.

CookEase does the calculation for every recipe you save: it works out calories, protein, carbs and fat for the whole recipe from its ingredients and amounts, then divides by the servings, and it keeps the numbers as stated when the creator gives them. If you weigh things yourself, you can type your own figures into any recipe and they stay. Change the servings and the per-serving numbers follow. The nutrition help page explains how the numbers are worked out.