How Many Calories to Lose 2 Pounds a Week

Two pounds a week is the number people land on when they decide to get serious. It is the upper end of what health authorities describe as a sensible pace, it sounds achievable, and it makes the arithmetic to a goal weight comfortingly short. The question is what it actually costs per day — and whether that cost is one your body can pay for as long as you need it to.

The short answer: a 1,000-calorie deficit every single day. Whether that leaves you with a workable number to eat depends entirely on how many calories you burn in the first place, and for a large share of people it does not.

The arithmetic

A pound of body fat stores roughly 3,500 calories of energy. To lose two pounds in a week you need to run a shortfall of about 7,000 calories across those seven days, which works out to 1,000 a day:

• 0.5 lb a week — 250 calories a day
• 1 lb a week — 500 calories a day
• 1.5 lb a week — 750 calories a day
• 2 lb a week — 1,000 calories a day

That deficit is measured against your maintenance calories, not against some universal starting point. So the first number you need is your total daily energy expenditure — everything your body burns at rest plus everything you burn moving around. Once you have it, subtract 1,000 and you have your target. The calorie deficit calculator does both steps and tells you when the answer is a number you should not be eating.

What that looks like for real people

Here is why the same goal is reasonable for one person and a bad idea for another. Three examples, all using the Mifflin–St Jeor equation with a lightly active multiplier:

For the first person, two pounds a week is comfortable — 1,780 calories is a normal, well-fed day with room for protein at every meal. For the second, 1,290 is tight: workable for a stretch with careful planning, but with very little margin for error. For the third, 820 calories is below any reasonable floor. That is not a diet, it is a medically supervised intervention. Same goal, three completely different propositions.

This is the part most “lose 2 lb a week” advice skips. The deficit is fixed at 1,000 calories, but what is left over after subtracting it is not. The less you weigh and the shorter you are, the less room there is.

The floor you should not go under

The commonly cited minimums for unsupervised dieting are 1,200 calories a day for women and 1,500 for men. These are not arbitrary: below that level it becomes genuinely difficult to hit your protein target and your vitamin and mineral needs from food, and the risk of losing muscle alongside fat climbs sharply. Very low calorie diets exist and can be appropriate, but they belong under the supervision of a doctor or registered dietitian, not a calculator.

If subtracting 1,000 from your maintenance drops you under that line, you have three honest options, and only one of them is bad:

1. Take a slower pace. One pound a week gets you to the same place; it just takes twice as long and you arrive with more muscle and less resentment.
2. Raise the other side. Adding 8,000–10,000 steps a day is worth roughly 300–400 calories for most people. That widens the gap without taking anything off the plate — and it is why the same target is achievable at a higher food intake for someone who moves more.
3. Eat under the floor anyway. This is the option that produces fast initial numbers, then a stall, then a rebound. Skip it.

Why the scale rarely cooperates exactly

Even a perfectly executed 1,000-calorie deficit does not produce a tidy two pounds every Sunday. Three things get in the way.

The deficit shrinks as you do. A lighter body costs less to run. Lose 15 lb and your maintenance may drop by 100–150 calories a day, which means the meal plan that created a 1,000-calorie gap now creates an 850-calorie one. Recalculate every 10–15 lb rather than assuming the original number holds.

Water masks fat. Glycogen, sodium, stress hormones, and the menstrual cycle can each swing scale weight by several pounds in either direction. Fat loss is happening underneath; you simply cannot see it that week. Judge progress on a weekly average, never on a single morning.

Not all of it is fat. The 3,500-calories-per-pound rule describes body fat specifically. Rapid loss always includes some water and, if protein and training are neglected, some muscle. That is exactly the tissue you want to keep, because it is what keeps your maintenance calories high.

Protecting muscle at a large deficit

The bigger the deficit, the harder your body looks for tissue to break down, and the more deliberately you have to defend muscle. Two levers do almost all of the work.

The first is protein. Sports-nutrition guidance puts the useful range at roughly 1.6–2.2 g per kilogram of body weight per day while dieting — the macro calculator will size it for you. In practice, that means anchoring each meal rather than doing arithmetic at the end of the day: a chicken breast at lunch, a cup of Greek yogurt or a tin of sardines as a snack, a cup of lentils in the evening, and you are most of the way there before you have thought about it.

The second is resistance training two or three times a week. You do not need a complicated programme — you need to give your body a reason to hold on to muscle it would otherwise let go.

Where 2 lb a week usually goes wrong

It is almost never willpower. It is the logging. Research on self-reported food intake consistently finds people undercount by 20–40% — cooking oil, the milk in coffee, the bites while plating, the second helping that felt like the same portion. A 1,000-calorie plan with a 30% blind spot is a 400-calorie plan, and 400 calories a week does not move a scale enough to keep anyone motivated.

Two fixes close most of that gap. The first is knowing the numbers for the foods you eat every week; our calorie and macro database lists per-100 g and per-serving figures for everyday staples, and memorising a dozen of them turns a plate into arithmetic you can do in your head. The second is using a logging method fast enough that you still do it on a Wednesday evening. If a kitchen scale is where you fall off, our guide to counting calories without weighing food covers the estimation methods that hold up under real conditions.

So should you aim for 2 pounds a week?

A useful rule of thumb is to keep weekly loss to about 0.5–1% of body weight. At 240 lb, two pounds a week sits comfortably inside that. At 150 lb, it does not — one pound is the aggressive option and half a pound is the sustainable one.

There is also a timing argument. Larger deficits work best at the start, when you have more fat to lose and more calories to play with, and get progressively worse as you get leaner: less energy for training, more hunger, more muscle at risk. Starting aggressive and tapering as you approach your goal is a better shape for the whole project than picking one number and grimly holding it.

Run your own figures in the calorie deficit calculator — it will show you the daily target for each pace, flag it when the number falls below a safe floor, and give you a realistic timeline for the one you pick. Then commit to the pace you can still be running in three months, not the one that looks best on paper today.