How many calories should you eat to lose weight?
Weight loss comes down to a calorie deficit. Here is how to find your number and a safe pace to aim for.
Estimate the calories your body burns at rest and across your day.
Losing weight sounds complicated, but the core idea is simple: to lose weight you need to eat fewer calories than your body burns. That gap is called a calorie deficit, and everything else, from which diet you follow to how much you exercise, is really just a different way of creating one. Here is how to turn that idea into a daily number you can actually use.
What is a calorie deficit?
A calorie deficit means taking in fewer calories than you spend, so your body makes up the difference by drawing on stored energy, mostly fat. It is the one thing every successful diet has in common, whether it calls itself low-carb, low-fat, keto or intermittent fasting. Those approaches all work by making you eat less overall; none of them override the basic arithmetic. That is good news, because it means you do not need a special diet, just a target and a way to hit it.
Step one: find your maintenance calories
Your maintenance level, often called TDEE (total daily energy expenditure), is the number of calories that keeps your weight steady. It depends on your age, height, weight, sex and how active you are. A larger or more active body burns more; a smaller or more sedentary one burns less. A calorie calculator estimates this for you from a few inputs, and it is the starting point for everything that follows.
How many calories to lose weight per day
Once you know roughly what you burn, you eat a bit less than that. A pound of body fat holds roughly 3,500 calories, so a deficit of about 500 calories a day works out to around a pound a week. The Mayo Clinic notes that cutting about 500 calories a day typically leads to roughly half a pound to a pound of loss per week, and that the exact result varies with your body, sex and activity level.
As a worked example, if your maintenance level is about 2,400 calories, eating around 1,900 a day points to roughly a pound of loss per week. Prefer a gentler pace? A 250 a day deficit still adds up to real progress over a couple of months, and it is easier to stick to. The right daily number is simply your maintenance calories minus the deficit you choose.
How many calories for women and for men?
There is no single figure, because maintenance depends on your own body, but the ranges differ. Many women maintain on roughly 1,800 to 2,200 calories and lose weight somewhere around 1,400 to 1,700; many men maintain on roughly 2,200 to 2,800 and lose around 1,800 to 2,300. These are only starting points. What matters is not to drop too low: a common floor is not to eat below about 1,200 calories a day for women or about 1,500 for men without medical supervision, because very low intakes are hard to sustain and make it difficult to get enough nutrients.
Can you lose weight without exercise?
Yes. Weight loss is driven mainly by the deficit, and you can create the whole thing through food alone, which is why people do lose weight without setting foot in a gym. But you can also widen the deficit by burning more, not only by eating less. Everyday movement and exercise both add to the calories you use, which is why walking more or adding a few workouts makes the eating side easier and lets you eat a little more for the same result. Our calories burned calculator estimates what different activities add, so you can see how a daily walk fits into the picture.
Losing fat without losing muscle
If your goal is to lose fat and keep or build muscle, two things do most of the work. First, keep the deficit moderate rather than extreme, because aggressive cuts burn muscle alongside fat. Second, eat enough protein and do some resistance training, which together signal your body to hold on to muscle while the fat comes off. This is why the same deficit can leave two people looking very different: one who lifts and eats protein keeps their shape, while one who crash-diets ends up smaller but softer.
Why slower is usually better
It is tempting to cut calories hard for fast results, but very large deficits tend to backfire. They are difficult to sustain, they can leave you tired and hungry, and they often lead to giving up and regaining the weight. Losing too fast also carries real risks, from muscle loss to gallstones. A modest deficit protects your energy and makes the change something you can live with, which is what actually gets results over months rather than days. The widely used guideline is to aim to lose no more than about one to two pounds a week.
Why has my weight loss stalled?
Plateaus are normal and rarely mean you are doing something wrong. As you lose weight your body burns a little less, so a deficit that worked at your old weight can quietly become maintenance at your new one. The fix is to recalculate your maintenance calories at your current weight and adjust the target down a little, or add some activity. Day-to-day water changes also mask fat loss, so judge progress by the trend over two or three weeks, not a single morning on the scale.
The bottom line
Find your maintenance calories, subtract a sensible deficit of around 250 to 500 a day, keep protein up if you want to hold muscle, and give it time. Steady beats drastic almost every time. This is general information, not medical or dietary advice, so if you have a health condition, are pregnant or breastfeeding, or plan a big change, check with a qualified professional first.
Frequently asked questions
How many calories should I eat a day to lose weight?
Take your maintenance calories (TDEE) and subtract about 250 to 500. For many women that lands somewhere around 1,400 to 1,700 and for many men around 1,800 to 2,300, but it depends on your own body, so estimate your maintenance first with a calorie calculator.
How big a calorie deficit is safe?
A deficit of about 500 calories a day is the common target, pointing to roughly half a pound to a pound of loss per week, and up to 1,000 a day for about two pounds. Larger deficits are hard to sustain, risk muscle loss, and are best discussed with a professional.
Can I lose weight without exercising?
Yes. Weight loss is driven by the calorie deficit, which you can create through food alone. Exercise helps by widening the deficit and protecting muscle, so it makes the eating side easier, but it is not strictly required to lose weight.
How do I lose fat without losing muscle?
Keep the deficit moderate rather than extreme, eat enough protein, and do some resistance training. Together these tell your body to hold on to muscle while fat comes off, which is why crash diets that skip protein tend to cost you muscle too.
Why has my weight loss stalled?
As you lose weight your body burns a little less, so an old deficit can become maintenance. Recalculate your maintenance calories at your new weight and adjust. Day-to-day water changes also hide progress, so judge by the trend over weeks.