FIT BY SCIENCEMACRO CALCULATOR
FREE MACRO CALCULATOR

LEARN THE BASICS.
THEN GET YOUR NUMBERS.

If you're new to macros or food tracking, start with the short guide below. If you already know the basics, jump straight to the calculator.

NEW TO TRACKING?

HERE'S ALL YOU
NEED TO START.

You don't need special containers, a complicated meal plan, or perfect measurements. A simple food scale and a food-tracking app can make your targets much easier to understand.

01
A basic digital food scale

Use grams when you can. They're easier and more consistent than guessing with cups or spoonfuls.

02
Any food-tracking app you'll actually use

Search or scan your food, enter the amount you ate, and let the app do the math.

FOOD SCALE 101 How to weigh something in about 10 seconds.
  1. 1
    Put your plate or bowl on the scale.The weight of the dish doesn't matter.
  2. 2
    Press TARE / ZERO.The display goes back to 0g. “Tare” simply means zeroing out the container.
  3. 3
    Add your food and log the grams.If it reads 145g, enter 145g in your tracking app. That's it.
ONE RULE THAT PREVENTS A LOT OF CONFUSION Match the food entry to how you weighed it.

If you weigh chicken, rice, or pasta raw, use a raw entry. If you weigh it cooked, use a cooked entry. Water changes the weight during cooking, so consistency matters.

MAKE TRACKING EASIER OVER TIME Save foods and meals you eat often.

Your first few days take the longest. Once your usual breakfast, snacks, and meals are saved, tracking becomes much faster.

The scale is a learning tool, not a life sentence. Use it to learn what portions look like. You do not need to weigh every bite forever, and restaurant meals can simply be estimated.
IF YOU'RE CURIOUS

COMMON QUESTIONS.

What are “macros”?

The main macros are protein, carbohydrates and fat. Fiber is a type of carbohydrate, not a micronutrient, but it is useful enough to track separately. Your fiber goal is already included within your total carb target.

Do I have to hit these numbers exactly?

No. They're starting targets, not a test. Getting reasonably close consistently is enough.

How do I know what's in my food?

Nutrition labels and food-tracking apps can do the math for you. You don't need to calculate it yourself.

Do I need to weigh my food forever?

No. A scale is most useful while you're learning portions and when you want more consistency. Many people become much better at estimating over time.

Can I still eat at restaurants or have dessert?

Yes. You don't need a perfect diet. Your overall habits across time matter more than one meal.

What if I go over one day?

Just continue normally at your next meal or the next day. No punishment and no starting over.

How is this calculated?

We estimate your energy needs from the information you entered, then adjust that estimate for your goal. It's a useful starting point, not a measurement of your exact metabolism.

READY?

CALCULATE YOUR
STARTING TARGETS.

It takes about a minute. You'll get a starting calorie target plus protein, carbs, fat, and a daily fiber goal based on your answers.

START CALCULATOR →
01 / 04 · ABOUT YOU
60-SECOND STARTING POINT

LET'S START
WITH YOU.

A few basics help estimate how much energy your body uses each day.

Sex used for calculation
Height
5ft
6in