Counting Macros for Weight Loss: A Practical Guide for Canadians

Counting macros sounds fussy, but it is just a budget. Calories are the total you can spend each day, and protein, carbohydrate and fat are the three ways you spend them. Get the total right and you lose weight. Get the protein right as well and most of what you lose is fat, not the muscle you worked for.

This guide walks through setting your numbers, tracking them with the food you actually buy in Canada, and adjusting when progress slows. If you want the numbers done for you, the macro calculator does every step below in a few seconds.

What macros are, in one minute

Each macronutrient carries a fixed amount of energy:

That is why fat-heavy foods add up so quickly: a tablespoon of olive oil holds about 120 calories, the same as a medium apple and a small yogurt together. It is also why alcohol quietly derails a lot of diets. It counts toward your calories without counting toward any macro.

Step 1: find your maintenance calories

Maintenance is the amount that keeps your weight steady. The most widely used estimate is the Mifflin-St Jeor equation, which works from your weight, height, age and sex to estimate what you burn at rest, then multiplies that by your activity level. For a 185 lb (84 kg), 5 ft 10 in man of 32 who trains four days a week, it lands around 2,750 to 2,800 calories a day.

Treat that as a starting point, not a fact. Equations can be off by 10 percent either way, which is why the adjusting step later matters more than getting this number perfect.

Step 2: set a deficit you can live with

One kilogram of body weight is roughly 7,700 calories of stored energy, so a daily deficit of about 550 calories works out to around half a kilo a week. Two sensible ranges:

• Steady: lose about 0.5 percent of body weight a week. Hunger stays manageable and training quality holds up.
• Faster: about 1 percent a week. Fine for a short push if you carry more fat, harder to keep up for months.

Going lower than about 1.1 times your resting burn rarely pays off. Energy, sleep and mood suffer, and the weight that comes off includes more muscle.

Step 3: set protein first

Protein is the macro that protects muscle while you are in a deficit, and it is the most filling of the three. Research on lifters points to about 1.6 g per kg of body weight as the level where most of the benefit is reached, with more being useful when you are lean and dieting hard. For most people a target of 1.6 to 2.2 g per kg (roughly 0.7 to 1 g per lb) is simple and safe.

Spread it out. Three to five meals of 30 to 50 g each is easier to hit than one huge serving at dinner, and it keeps you fuller through the day.

Food (common Canadian portion)	Protein	Calories
Skyr or Greek yogurt, 0%, 3/4 cup (175 g)	17 to 19 g	100 to 110
Chicken breast, cooked, 120 g	36 g	190
Canned light tuna, drained, 1 can (120 g)	26 to 28 g	120
Eggs, 2 large	12 g	145
Cottage cheese, 2%, 1/2 cup	14 g	100
Extra-firm tofu, 150 g	21 to 24 g	190
Lentils, cooked, 1 cup	18 g	230

Step 4: split the rest between fat and carbs

Keep fat at roughly 20 to 30 percent of calories. Below that, meals get dull and hormone health can suffer over long diets. Whatever calories remain go to carbohydrate, which fuels training. If you lift hard, more carbs on training days and fewer on rest days can help performance without changing your weekly total.

A worked example for the 185 lb man above, cutting at about 2,320 calories:

1. Protein: 2.0 g × 84 kg = 168 g, which is 672 calories.
2. Fat: 25 percent of 2,320 = 580 calories, which is about 64 g.
3. Carbs: the remaining 1,068 calories, which is about 268 g.

Step 5: track without losing your mind

A food scale is the single most useful tool. Measuring cups underestimate dense foods like rice, peanut butter and granola by a wide margin. Weigh foods raw where you can, because cooked weights change with water.

Canadian labels help. The Nutrition Facts table lists energy, fat, carbohydrate (with fibre and sugars inside it) and protein per stated serving, and the serving size is printed at the top. Check that serving size against what you actually ate; a bag of chips labelled “per 50 g” is rarely eaten 50 g at a time.

Step 6: adjust from the trend, not a single day

Daily weight swings of 1 to 2 kg are normal and mostly water, salt and food in your gut. Weigh yourself first thing in the morning three or more times a week and compare two-week averages.

• Losing about as planned: change nothing.
• No change for two to three weeks: drop 100 to 150 calories a day, mostly from carbs or fat, or add 2,000 to 3,000 daily steps.
• Losing much faster than planned and feeling flat: add 100 to 150 calories back.

Common mistakes

When to get help

If you have diabetes, kidney disease, a thyroid condition, are pregnant, or have a history of disordered eating, ask your doctor or a registered dietitian before setting a deficit. Tracking can also feed obsessive habits in some people; if it starts to feel that way, step back to simpler rules like a palm of protein at every meal.