How to Track Macros: A Beginner's Guide

Tracking macros means logging your protein, carbs, and fat in grams each day, alongside your calories, so your body gets what it actually needs to reach your goal — not just "fewer calories," but the right calories. If you've only ever counted calories before, this is the upgrade that makes the biggest difference to how you look and feel.

What are macros, actually?

"Macros" is short for macronutrients — the three things that make up almost everything you eat:

Protein (4 calories per gram) — builds and repairs muscle, keeps you fuller for longer
Carbohydrates (4 calories per gram) — your body's main fuel source, especially for training
Fat (9 calories per gram) — supports hormones, joint health, and nutrient absorption

Calories are just the total energy from all three combined. Two meals can have identical calories and completely different effects on your body, depending on how those calories are split. That's the whole reason macro tracking exists.

Why track macros instead of just calories?

If your only goal is to lose weight, calories alone can get you there. But most people training towards a goal — losing fat while keeping muscle, building muscle without piling on fat, or simply feeling stronger and less hungry — need more precision than "eat less."

Protein is the big one. Under-eating protein while in a calorie deficit is the single most common reason people lose muscle along with fat, ending up lighter but softer rather than leaner. Hitting a protein target protects the muscle you've worked for, while your carbs and fat fill in the rest to support energy and recovery.

How do I calculate my macros?

You don't need a spreadsheet or a calculator app to get started — that's the part Janey Macros does for you. When you set up your goal (your current weight, target, and timeline), we calculate a daily calorie target and split it into protein, carb, and fat grams that match what you're trying to achieve. No guesswork, no generic "one size fits all" numbers pulled off a chart.

If you want to understand the logic behind it: protein is typically set first, based on your body weight and goal, since it's the macro most tied to preserving muscle. Fat gets a minimum to support hormone health. Whatever calories remain go to carbs, which fuel your training and daily energy.

What does tracking actually look like day to day?

In practice, it's simpler than people expect:

Log what you eat — a recipe, a homemade meal, or something you picked up. Janey Macros recipes come pre-logged with full macros, so tracking a home-cooked meal takes one tap.
Watch your daily totals — your calorie and macro rings fill up as you log, so you can see at a glance how the day is shaping up.
Adjust as you go — running low on protein by dinner? Pick a protein-heavy option to close the gap. That's tracking working for you, not against you.

You don't need to hit your numbers exactly every single day. Consistency over a week matters far more than perfection on any one day.

Do I have to weigh every single ingredient?

Not if you're cooking from Janey recipes — the macros are already calculated per serving, so logging a meal is one tap, not a kitchen scale and a calculator. If you're logging your own meals, a rough estimate is genuinely fine most of the time; save the precise weighing for foods where portion size makes a big difference, like oils, nuts, or rice.

What happens when life gets in the way?

This is where most tracking apps fall down — and where Janey Macros is built differently. If you go over your targets one day (a birthday, a bad day, a meal out with friends), a plan that can't adapt just leaves you stuck, either giving up or trying to "make up for it" in a way that isn't sustainable. Janey Macros rebalances the rest of your week automatically, adjusting your remaining daily targets so you stay on track for your goal without needing to be perfect. We cover exactly how that works in what to do when you go over your calories.

Getting started

The best way to learn macro tracking is to just start — pick a goal, let us calculate your targets, and log your first meal today. You'll get a feel for it within a few days, and the numbers stop feeling like homework and start feeling like information that helps you cook and eat with more confidence.

Ready to see your own numbers? Start your free trial and get your personalised targets in minutes.