Your basal metabolic rate (BMR) is the foundation. For men, it's BMR = 10 x weight (kg) + 6.25 x height (cm) - 5 x age (years) + 5; for women, it's BMR = 10 x weight (kg) + 6.25 x height (cm) - 5 x age (years) - 161. Multiply your BMR by an activity factor (sedentary 1.2, lightly active 1.375, moderately active 1.55, very active 1.725, extra active 1.9) to get your total daily energy expenditure (TDEE). Then create a calorie deficit of 10 to 20 percent below TDEE. Finally, convert your calorie target into grams of protein, carbs, and fat using the fact that protein and carbs have 4 calories per gram, and fat has 9.
Start by calculating your BMR using the Mifflin-St. Jeor equation. For a 35-year-old woman who weighs 70 kg (154 lbs) and is 165 cm (5'5") tall, it goes like this: (10 x 70) + (6.25 x 165) - (5 x 35) - 161 = 1,454 calories. That's what her body needs just to stay alive. Do the math for yourself.
Next, factor in your activity level. Multiply your BMR by your activity factor. The woman above exercises 3-4 times a week, so she's moderately active: 1,454 x 1.55 = 2,254 calories. That's her maintenance.
Create a deficit by taking 10 to 20 percent off. 2,254 x 0.85 = 1,916 calories per day. That's her target for losing about half a pound to one pound per week.
Finally, split those calories into macros. I like starting at 30% protein, 30% fat, 40% carbs. At 1,916 calories: Protein: 1,916 x 0.30 = 575 calories / 4 = 144 grams; Fat: 1,916 x 0.30 = 575 / 9 = 64 grams; Carbs: 1,916 x 0.40 = 766 / 4 = 192 grams. That's your target. Simple.
I remember when I first started, I forgot to account for my morning coffee creamer. That alone was 100 calories I was missing. Little things add up.
A lot of people mess up by not tracking accurately. They eyeball portions and end up 500 calories over. Others starve themselves with a <a href="/calorie-deficit-for-weight-loss">steep deficit</a> like 1,200 calories when they need 2,200. That's a disaster. You'll lose muscle, feel like crap, and binge. Another common mistake is ignoring protein. Aim for 0.7 to 1.0 grams per pound of goal body weight. If you don't, you'll lose muscle instead of fat. Also, if you're not losing weight after two weeks, adjust your activity factor or drop calories by 100. Still stuck? Check your tracking accuracy. If you're hungry all the time, bump up <a href="/protein-powder-for-weight-loss">protein</a> or fat. If you feel low energy, shift some fat calories to carbs.
If you're looking for a tool to help with focus and consistency, check out The Memory Wave. It's a brain-audio program that some people use to stay on track with goals. I've tried it, and it's not a magic bullet, but it helps with mental clarity.
Some common questions: What are macros? They're protein, carbohydrates, and fats. Your body needs them in large amounts for energy and function. Protein has 4 calories per gram, carbs have 4, and fat has 9. How do I calculate my macros for weight loss? Find your TDEE using the Mifflin-St. Jeor equation and an activity multiplier. Subtract 10-20% for a deficit. Then split those calories into 30% protein, 30% fat, 40% carbs, and divide by 4 or 9 to get grams. How accurate are macro calculators? Calculators estimate your needs. They're a starting point, not a perfect answer. Adjust after 2-3 weeks. What happens if I eat too little protein? You'll lose muscle mass, which slows your metabolism and makes weight loss harder. Aim for 0.7-1.0 grams per pound of goal body weight. Can I eat carbs and still lose weight? Yes. Carbs are not the enemy. The body turns carbs into glucose for energy. Focus on complex carbs like vegetables, whole grains, and legumes instead of sugar. How long until I see results? With a consistent deficit of 10-20% below TDEE, you should lose about 0.5-1 pound per week. Give it two weeks to see a trend.
Look, counting macros isn't rocket science. It's just math plus patience. Give it a solid two weeks, and you'll see the trend. Good luck.
