How do I calculate macros for a homemade recipe?

To calculate macros for a homemade recipe, look up the nutrition facts for each ingredient (per 100g or per unit), multiply by the amount used, sum all macros across ingredients, then divide by the number of servings. For accuracy, always weigh ingredients using a digital kitchen scale rather than relying on volume measurements like cups or tablespoons. This is especially important for calorie-dense ingredients like olive oil, nuts, cheese, and nut butters where even small measurement errors significantly affect totals.

How long does meal prepped food last in the fridge?

Most cooked meal prep food lasts 3–4 days in the refrigerator at or below 4°C (40°F). Cooked proteins like chicken, beef, and fish should be consumed within 3–4 days. Cooked grains like rice and quinoa last 3–5 days. Raw vegetables (washed and chopped) stay fresh for 3–5 days. Soups and stews last 3–4 days. For anything beyond 4 days, freeze individual portions and thaw as needed. Always label containers with the date prepared.

What are the best containers for meal prep?

Glass containers with airtight lids are the gold standard for meal prep — they do not absorb odors or stains, are microwave-safe, and last for years. BPA-free plastic containers are lighter and more portable for work or gym use. Compartment containers are useful for keeping sauces and dressings separate until serving. Look for leak-proof lids if transporting liquid-containing meals. For freezer meals, wide-mouth mason jars or freezer-safe zip bags with the air squeezed out work well.

How do I scale a recipe for meal prep?

To scale a recipe, multiply each ingredient quantity by your desired batch factor. If a recipe serves 2 and you want 8 servings, multiply every ingredient by 4. For macro tracking purposes, the macros per serving remain the same regardless of batch size — you are simply making more servings. The critical step is re-weighing your total cooked yield and dividing by the number of servings to get an accurate per-serving weight, since cooking reduces weight through water evaporation.

Should I track macros before or after cooking?

Track macros using raw (uncooked) ingredient weights whenever possible. Cooking changes the water content of food, which changes its weight without changing its calorie content. For example, 100g of raw chicken breast yields roughly 75g cooked, but the calories and protein remain the same. Tracking raw weights eliminates this variability. If you must track cooked weights, use nutrition databases that specifically list "cooked" values, and note that cooked values will differ from raw values for the same food.

How much protein should I target per meal prep container?

A practical approach is to build each container around a protein target first. For muscle building, target 30–50g protein per container if eating 3–4 meals per day. For fat loss with muscle preservation, target 30–40g protein per container. A palm-sized portion of chicken breast (about 130g cooked) provides roughly 30g protein. Ground turkey, salmon, eggs, and Greek yogurt are good alternatives that batch cook well. Once protein is set, fill the rest of the container with carbs and vegetables to hit your calorie target.

What foods are best for meal prepping?

The best meal prep foods are those that store well, reheat without quality loss, and provide good macro density. For proteins: boneless chicken breast or thighs, ground turkey, lean ground beef, hard-boiled eggs, canned tuna. For carbs: cooked rice, quinoa, sweet potatoes, oats. For vegetables: roasted broccoli, cauliflower, bell peppers, carrots. Foods to avoid prepping in bulk: leafy salad greens (wilt quickly), fried foods (go soggy), avocado (oxidizes), and fresh tomatoes (become watery).

How do I account for cooking oil in my macro totals?

Cooking oil is one of the most commonly missed macro sources. One tablespoon of olive oil contains 14g fat and 120 kcal — small volumes have large caloric impact. Always measure oil before adding it to the pan (not by pouring freely). For batch cooking, measure total oil used and divide by number of servings. When roasting vegetables for the week, measure the oil used for the entire tray, then divide by the number of portions you get from that tray. Cooking spray (like PAM) contains negligible calories for typical use.

Recipe Macros and Meal Prep: A Practical Guide

You can't prep efficiently without knowing what's in each serving. That sounds obvious once you hear it, but most people approach meal prep and macro tracking as two separate activities — one is about cooking in bulk, the other is about logging food. In practice, they only work well together. This guide covers how to calculate macros for your recipes, how to scale those recipes for a week's worth of meals, and how to build a sustainable prep workflow that saves time and eliminates daily nutrition guesswork.

Calculating Macros for a Recipe

The fundamental formula is simple: sum the macros for every ingredient, then divide by the number of servings the recipe produces. The challenge is executing it accurately, especially for calorie-dense ingredients where small errors compound.

Here is the step-by-step process:

List every ingredient with its amount: Include everything — including cooking oil, sauces, marinades, and condiments. These are frequently omitted and represent a significant source of hidden calories.
Weigh ingredients on a digital scale: Use grams for accuracy. Volume measurements (cups, tablespoons) are unreliable for calorie-dense ingredients like olive oil, almond butter, and shredded cheese, where packing density varies. A cup of almonds can range from 115g to 145g depending on how tightly packed it is.
Look up macros per 100g (or per unit for countable foods): Use a reliable nutrition database. Most foods show protein, carbohydrates, and fat per 100g. Multiply by (amount used ÷ 100) to get the macro contribution from that ingredient.
Sum all ingredients: Add up protein, carbs, and fat separately across all ingredients to get total recipe macros.
Divide by servings: The result is your per-serving macro breakdown. The more servings you define, the more granular your tracking can be.

An important note on tracking raw versus cooked weights: cooking reduces the water content of food, which changes its weight without changing its calorie content. 100g of raw chicken breast yields roughly 75g of cooked chicken, but the calories and protein are the same. For consistency, track ingredients at their raw weight before cooking. If you must track cooked weights, use nutrition database entries specifically labeled "cooked." Our recipe macro calculator handles this automatically — you enter raw ingredient weights and it calculates per-serving macros.

Scaling Recipes for Batch Meal Prep

Once you know the macros for a single-serve recipe, scaling for meal prep is straightforward. Multiply each ingredient by your batch factor. If a recipe serves 2 and you want 8 servings for the week, multiply every ingredient by 4.

The macros per serving do not change when you scale — only the total quantities change. A 4x batch of your chicken and rice bowl still has the same protein, carbs, and fat per container as the single-serve version.

A useful practical approach is to work backwards from your protein target. Decide how many grams of protein you want per container (typically 30–50g for muscle-building goals), then determine what protein source and quantity provides that, and scale the rest of the recipe around it. Our meal prep quantity calculator can help you determine exact ingredient quantities for any batch size and protein target.

A Practical Meal Prep Workflow

The most reliable meal prep system is a Sunday prep model: dedicate 1.5–2 hours on Sunday to prepare the building blocks of your meals, then assemble them during the week in under 5 minutes per meal.

Step 1: Prepare Proteins (45–60 minutes)

Proteins are the most time-intensive component and the most important macro to control. Batch cook 2–3 protein sources to create variety across the week:

Chicken breast: Bake at 200°C (400°F) for 20–25 minutes. Season with salt, pepper, and garlic powder. Cook 1–1.5 kg for 4 people for a week.
Ground turkey or beef: Brown in a large skillet over medium heat. Season while cooking. Portion into containers at 130–150g per serving.
Eggs: Hard-boil a dozen at once. Store in the fridge unpeeled for up to one week.

Step 2: Cook Grains and Carbs (20–30 minutes, mostly passive)

Rice, quinoa, and sweet potatoes are ideal batch-cook carbs. Use a rice cooker or instant pot to free up attention while proteins are in the oven:

White or brown rice: 1 cup dry yields ~3 cups cooked (~600g). Approximately 130 kcal, 28g carbs, 3g protein per 150g cooked serving.
Sweet potato: Cube and roast at 200°C alongside your protein. 200g cooked provides ~27g carbs, 2g protein, 172 kcal.

Step 3: Prep Vegetables (20–30 minutes)

Wash, chop, and either roast or blanch your vegetables. Roasted vegetables store and reheat better than raw. Broccoli, cauliflower, bell peppers, and zucchini all work well. Keep leafy greens separate and unprepped — they wilt within 1–2 days once cut.

Assembly: Two Approaches

There are two schools of meal prep assembly:

Component approach: Store proteins, carbs, and vegetables in separate containers. Assemble plates daily. Advantage: more flexibility, less food fatigue across the week.
Complete-meal containers: Assemble all components into individual meal-sized containers on prep day. Advantage: grab-and-go convenience, precise macro tracking per container.

For macro tracking precision, complete-meal containers are superior — you weigh and portion everything once and know exactly what each container contains.

Storage and Shelf Life

Food safety and quality are both important in meal prep. The general guidelines:

Refrigerator (below 4°C / 40°F): Cooked proteins, grains, and vegetables — 3–4 days. Soups and stews — 3–4 days. Hard-boiled eggs (unpeeled) — up to 1 week.
Freezer (below −18°C / 0°F): Most cooked meals — 1–3 months. Cooked chicken and beef — up to 4 months. Soups and stews — 2–3 months.

A practical strategy for a full week of meal prep: prepare fresh meals for Monday–Wednesday (3–4 days refrigerated), and freeze Thursday–Sunday portions. Thaw frozen containers in the refrigerator the night before use.

Label every container with the date prepared and the macros per serving. A simple masking tape label with a marker takes 10 seconds and eliminates guesswork when you are tired and hungry mid-week.

Common Meal Prep Mistakes

Mistake 1: Not Accounting for Cooking Oil

This is the single most common macro tracking error in meal prep. One tablespoon of olive oil adds 120 kcal and 14g fat. A pan of roasted vegetables using 3 tablespoons of oil adds 360 kcal to what most people assume is a "light" side dish. Always measure oil before use, and divide the total oil used by the number of servings produced.

Mistake 2: Volume Measures for Calorie-Dense Foods

Nuts, nut butters, seeds, cheese, and dried fruit have high caloric density and pack inconsistently into volume measures. A tablespoon of almond butter scooped loosely versus packed can differ by 30–40 calories. Use a scale for these foods. Even peanut butter, which feels easy to estimate, requires weighing for accurate tracking.

Mistake 3: Prepping Too Much Variety

Prepping 5 different proteins and 6 different side dishes on one prep day sounds like great variety, but it leads to cooking fatigue and food waste. A more sustainable approach is 2 proteins, 2 carb sources, and 2 vegetables per week. Rotate combinations during assembly for variety without the overhead of 10+ separate cooking tasks.

Mistake 4: Skipping the Per-Container Weigh-In

When portioning bulk-cooked food into containers, it is tempting to eyeball equal portions. For macro accuracy, weigh each component as you portion it. A quick check: total cooked weight ÷ number of servings = target weight per container. Weigh and adjust before sealing.