To count macros for weight loss, work in this order: set a calorie target below what you burn, set protein first, set fat second, and let carbohydrates take whatever is left. Concretely — estimate your daily energy expenditure, subtract roughly 15–20%, put about 0.7 to 1 gram of protein per pound of goal bodyweight, assign 20–30% of your calories to fat, and fill the rest with carbs. Then log what you eat, look at weekly averages rather than single days, and change one number at a time. That's the whole method. Everything after this is refinement.

Last updated: September 2026

Macros are just a split of your calories

"Macros" is short for macronutrients — protein, carbohydrate, and fat, the three things in food that carry calories. Protein and carbohydrate each supply about 4 calories per gram; fat supplies about 9. That ratio is the only arithmetic underneath any macro plan, and it's why macro counting can't contradict calorie counting: your macros multiplied out are your calorie total.

This matters because of where people usually get stuck. Most people struggle here — not because you need more discipline than you've got, but because the ratio came first. They pick something they read somewhere, 40/30/30 say, before they have a calorie number, then wonder why it isn't doing anything on its own. Fat loss is driven by the calorie total. The split determines how full you feel, how much muscle you hold onto, and whether you can keep going for more than a couple of weeks. Both jobs matter. They're just different jobs.

Calories first, split second. Always in that order.

Step 1: get a maintenance estimate, then subtract

Maintenance is the calorie level that keeps your weight roughly where it is. The formal name is TDEE — total daily energy expenditure, meaning your resting burn plus everything you do on top of it. Any calculator gives you an estimate, not a fact. Treat it as a starting hypothesis you'll revise in two or three weeks.

From maintenance, a deficit of about 15–20% is where most people begin. Bigger deficits aren't more virtuous — they're just harder to hold, and a plan you drop in week three does less for you than one you keep. For the longer version of this step, we wrote a full piece on how many calories you should eat to lose weight.

How quickly changes show up varies a lot between people. A slow week is information about your inputs, not a verdict on you.

Step 2: protein first

Protein is the macro worth defending. In a deficit it's what helps you hold onto muscle while you lose weight, and it's the most filling of the three, which quietly makes the whole thing more livable.

A common starting range is 0.7 to 1 gram per pound of your goal bodyweight. Someone aiming for 160 pounds lands somewhere around 110 to 160 grams a day. Round it to a number you can hit without a spreadsheet — landing in the range most days beats hitting it exactly twice a week.

If protein is the number you keep missing, that's ordinary, and it's mostly a logistics problem rather than a willpower one. How to hit protein goals works through the food side of it.

Step 3: fat next, carbs with what's left

Fat has a floor. Somewhere around 20–30% of calories is a reasonable band for most people. Going far below it tends to make food less satisfying, and for some people it shows up in sleep and mood before it ever shows up on the scale.

Carbohydrate takes the remainder: subtract your protein and fat calories from your target, divide what's left by four, and that's your carb number in grams. Carbs are the flex macro. Train hard and they go up; prefer more fat in your food and they come down. Neither version is more correct — what nobody tells you about macro ratios is that once protein is set and fat clears its floor, the rest is a preference question. The "best" split is mostly the one that matches food you like eating.

Worked example at 2,000 calories: 150g protein (600 cal) plus 60g fat (540 cal) leaves 860 calories, or about 215g of carbs.

Step 4: log it, then read the week

Two habits separate people who get something out of macro counting from people who abandon it in a fortnight.

Log at the moment of eating, not at bedtime. Recall is unreliable. Reconstructing a day from memory at 10pm is where the numbers go soft, and soft numbers can't tell you anything.

Judge by the week, not the day. A single day tells you almost nothing — water, sodium, and digestion move the scale more over 24 hours than a day of food does. Averages across seven to fourteen days are the actual signal.

Then adjust one lever at a time. If the trend hasn't moved after two or three weeks of consistent logging, either drop calories by 5–10% or add activity. Not both, or you won't know which one did the work.

Where the app does the arithmetic

Meal logging and workout logging sit on AllStrong's free tier. Logging is conversational — type or speak what you ate ("chicken burrito bowl and a Greek yogurt") and the app decomposes the dish into ingredients with macro and micronutrient estimates using USDA FoodData Central, instead of making you hunt through a database row by row. Premium adds a barcode scanner for packaged food. TDEE is calculated automatically from your stats and activity level, and it updates as your body composition changes.

Setting calorie and macro targets — with a progress bar that fills through the day as you log — is also on the free tier.

The reason it's built in that order: adherence is a habit problem before it's a nutrition problem. If you're putting the surrounding routine in place too, the habit tracking app side of AllStrong is where daily tasks, streaks, and badges live.

The fundamentals, restated

Calories set the direction. Protein protects muscle and appetite. Fat has a floor. Carbs fill the gap. Log in the moment, judge by the week, change one variable at a time.

That's the method. Macro counting got complicated because the internet rewards novelty, not because anything underneath it changed.

Frequently Asked Questions

How do I count macros for weight loss?

Set a calorie target about 15–20% below your maintenance estimate. Assign protein first, at roughly 0.7–1g per pound of goal bodyweight. Put 20–30% of your calories into fat, then give the remaining calories to carbohydrates. Log every meal as you eat it, and review weekly averages rather than daily numbers before you change anything.

Do I have to count macros, or is counting calories enough?

Calories alone will move your weight. Macros tell you what that weight is made of — mainly whether you keep muscle while you lose fat, which comes down largely to protein. If tracking three numbers feels like too much to sustain, track calories and protein and let the rest fall where it falls. That covers most of the benefit.

What's the best macro ratio for fat loss?

There isn't one. Once protein is set and fat clears a sensible floor, the split between the remaining carbs and fat is a preference question rather than a physiology question. Choose the version that fits the food you enjoy and the training you do, because a ratio you can sustain outperforms one that looks optimal on paper. To set the calorie number the ratio splits up, see calorie deficit calculator for fat loss.

How long should I track before changing my numbers?

Give it two to three weeks of consistent logging. Weight fluctuates day to day for reasons that have nothing to do with body fat, so shorter windows mostly measure noise. When you do adjust, change one thing — calories or activity — so you can tell which change moved the trend.

How do I track macros if I'm not trying to lose weight?

The same way, with a different calorie target. Start from your maintenance estimate (or a small surplus if you're building muscle), set protein first, then split what's left between fat and carbs. Our macro calculator for muscle gain walks through the numbers. Then log every meal for a week before you change anything. In AllStrong you can type or say what you ate and it tallies the macros for you. Photo and barcode logging are on Premium.