How Many Calories Should I Eat a Day to Lose Weight?

Most people lose weight steadily by eating about 500 calories below their maintenance level — typically 1,500–1,800 calories per day for women and 1,800–2,200 for men. Your exact number depends on your age, weight, height, and activity level, so calculate your total daily energy expenditure (TDEE) first, then subtract 15–25 percent.

Why This Matters

"Eat less, move more" sounds simple, but without a real number to aim for, most diets fail within weeks. Eat too much and the scale never moves. Cut too aggressively and hunger, fatigue, and a slowing metabolism push you straight back to old habits — usually with a few extra kilos as a souvenir.

Knowing your personal calorie target changes everything. It turns weight loss from guesswork into a plan you can actually follow, and it tells you whether a stall is a real plateau or just water weight hiding your progress. It also protects you from the most common mistake in dieting: eating so little that your body fights back.

The Science: Calculating Your Daily Calorie Target

Your body burns calories in two main ways. Your basal metabolic rate (BMR) is the energy you burn just staying alive — breathing, pumping blood, running your brain. On top of that comes movement: exercise, walking, even fidgeting. Together they make up your TDEE, or total daily energy expenditure.

Here is a simple way to estimate it:

Step 1 — Estimate your BMR using the Mifflin-St Jeor equation:

• Men: (10 × weight in kg) + (6.25 × height in cm) − (5 × age) + 5
• Women: (10 × weight in kg) + (6.25 × height in cm) − (5 × age) − 161

Step 2 — Multiply by your activity level:

• Mostly sitting: BMR × 1.2
• Light exercise 1–3 days a week: BMR × 1.375
• Moderate exercise 3–5 days a week: BMR × 1.55
• Hard training 6–7 days a week: BMR × 1.725

Step 3 — Subtract your deficit. A deficit of roughly 500 calories per day produces about half a kilogram of fat loss per week — fast enough to see results, slow enough to preserve muscle and sanity.

Example: A 35-year-old woman, 70 kg, 165 cm, lightly active: her BMR is about 1,425 calories, her TDEE about 1,960. Eating around 1,450–1,550 calories per day puts her in a healthy deficit.

One warning: do not chase bigger deficits hoping for faster results. Dropping below about 1,200 calories (women) or 1,500 calories (men) for extended periods tends to backfire. Your body responds to starvation-level intake by lowering its energy expenditure, increasing hunger hormones like ghrelin, and burning muscle along with fat. This is why crash diets almost always end in regain.

This is also where intermittent fasting earns its reputation. Instead of counting every bite across 16 waking hours, you compress eating into a shorter window — say, 12 pm to 8 pm on a 16:8 protocol. Two meals and a snack naturally add up to fewer calories than a full day of grazing, so many people land in a deficit without weighing food or logging apps. Fasting also gives insulin levels time to fall, which makes stored fat easier for your body to access between meals.

Practical Tips

• Calculate once, then trust the trend. Weigh yourself 2–3 times a week under the same conditions and watch the weekly average, not daily swings.
• Let your eating window do the counting. An 8-hour window with two solid, protein-rich meals typically lands most people near their target without meticulous tracking.
• Prioritize protein. Aim for 1.6–2 grams per kilogram of body weight. Protein preserves muscle in a deficit and is the most filling macronutrient.
• Watch liquid calories. Sugary drinks, juices, and sweetened coffee can quietly erase a 500-calorie deficit. During fasting hours, stick to water, black coffee, and plain tea.
• Adjust as you shrink. A lighter body burns fewer calories. Recalculate your TDEE after every 5 kg lost.
• Plan for plateaus. If weight stalls for 3+ weeks, tighten your eating window slightly or add a daily walk before cutting calories further.

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Frequently Asked Questions

Is 1,200 calories a day safe for weight loss?

For most adults, 1,200 calories is the absolute floor, not a target. It can be appropriate short-term for smaller, sedentary women under guidance, but for most people it causes fatigue, muscle loss, and rebound eating. A moderate deficit of 500 calories below your TDEE works better and lasts longer.

Do I still need to count calories if I do intermittent fasting?

Not necessarily. A shortened eating window naturally limits how much most people eat, which is exactly why fasting works for so many. That said, calories still matter — if you fill an 8-hour window with fried food and desserts, you can out-eat any fast. Track loosely for the first two weeks to learn your portions, then let the window do the work.

How fast should I expect to lose weight?

A safe, sustainable pace is 0.5–1 kg per week, or roughly 2–4 kg per month. The first week often shows a bigger drop — that is mostly water as your body empties its carbohydrate stores. Losing faster than 1 percent of body weight per week usually means you are losing muscle too.

Why am I not losing weight even in a calorie deficit?

The most common reasons: underestimating portions (studies show people under-report intake by 20–40 percent), weekend overeating cancelling weekday deficits, or water retention masking fat loss. Give any plan three honest weeks before judging it, and measure your waist as well as your weight.