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Macros for Weight Loss Calculator
This weight loss macro calculator builds your daily plan from your maintenance calories. Enter your TDEE, body weight, and how fast you want to lose, and you will get a calorie target plus protein, carb, and fat grams tuned for fat loss. Protein is set near 1 gram per pound of body weight to protect muscle in a deficit. Estimates only, not medical advice.
How to use
- Enter your TDEE (maintenance calories). Find it with our TDEE calculator if you do not know it.
- Add your body weight in pounds.
- Pick a daily deficit: 250, 500, or 750 calories.
- Click Calculate Weight Loss Macros and follow the gram targets.
Worked example
Take someone with a TDEE of 2,600 calories weighing 180 lb who picks the 500 calorie deficit. The daily target is 2,100 calories. Protein is 180 g (720 calories), fat is 63 g (567 calories), and carbs fill the rest: 2,100 minus 720 minus 567 is 813 calories, or about 203 g of carbs.
The estimated loss is 500 times 7 divided by 3,500, or about 1 lb per week. That is the classic sustainable pace most people can maintain for months.
The protein first method
This calculator sets protein from body weight first, then fat, then carbs last. The logic is simple: protein preserves muscle, fat supports hormones, and carbs are the flexible fuel you adjust up or down. Many macro plans fail because they start with fixed percentages that leave protein too low for dieters.
If you lift weights, treat the protein target as a minimum, not a ceiling. Hitting protein and calories matters more than perfect carb and fat numbers.
Frequently asked questions
Why is protein so high on this plan?
Protein protects muscle while you lose fat and keeps you fuller on fewer calories. This calculator sets protein near 1 gram per pound of body weight, which research supports during a deficit. It is the most important macro to hit.
What deficit should I pick?
A 500 calorie daily deficit leads to about one pound of fat loss per week for most people and is sustainable. A 250 deficit is slower but easier. A 750 deficit works short term but raises hunger and muscle loss risk.
I do not know my TDEE. What should I enter?
Estimate it first with a TDEE calculator using your age, weight, height, and activity level. A wrong TDEE makes every macro wrong, so spend the extra minute. After two to three weeks, adjust based on your actual weight trend.
Should I cut carbs to zero?
No. Very low carb diets are not required for fat loss, and carbs fuel training and help you stick to the plan. This calculator keeps carbs as the flexible macro: protein and fat are set first, and carbs fill the remaining calories.
What if my target drops below 1,200 calories?
The calculator will warn you. Very low calorie diets are hard to sustain and can cause nutrient gaps and muscle loss. Pick a smaller deficit, or confirm your TDEE is correct.
How do I adjust when weight loss stalls?
First verify tracking for a week, since portion creep is the usual cause. If intake is honest and weight is flat for three weeks, recalculate your TDEE at your new weight, then either trim 150 to 250 calories or add activity. Change one thing at a time.
How fast will I see results?
Expect one to two pounds per week at a 500 to 750 deficit after the first week, when water weight drops. Plateaus are normal. If weight stalls for three weeks, recalculate your TDEE or tighten tracking.