How Many Calories Should You Eat to Lose Weight?

The short answer to how many calories you should eat to lose weight is this: a few hundred fewer than your body burns in a day. That gap — the calorie deficit — is what makes the scale move, and it's the same principle whether you're losing five pounds or fifty. The longer answer is figuring out your number, because the right target depends on your size, your activity, and how fast you want to go. This guide gives you a clear, no-nonsense way to land on a sensible figure and, just as importantly, to actually hit it.

There's a lot of conflicting advice out there, but the math itself is refreshingly simple. Three steps.

Step 1: Estimate your maintenance calories (TDEE)

Before you can subtract, you need to know your starting point: how many calories your body burns on a typical day. That's your TDEE — Total Daily Energy Expenditure. It's built from two pieces:

• Your BMR (Basal Metabolic Rate) — the energy your body uses just to keep you alive at rest: breathing, circulation, brain activity. This is the bulk of what you burn.
• Your activity on top of that — walking, working out, fidgeting, everything you do beyond lying still.

A quick way to estimate TDEE is to find your BMR and multiply by an activity factor (roughly 1.2 if you're sedentary, around 1.55 if you're moderately active a few days a week, up to about 1.7+ if you're very active). Most calorie apps do this for you from your age, height, weight, and sex — but it helps to understand what the number means.

A worked example. Say a moderately active person has a BMR of about 1,500 calories. Multiply by an activity factor of 1.55 and you get a TDEE of roughly 2,300 calories a day. That's the amount they'd eat to maintain their current weight — eat that much and the scale holds steady. It's the baseline everything else hangs off of.

Treat your TDEE as an educated estimate, not a fixed truth. Two people with identical stats can burn meaningfully different amounts. You'll calibrate it against the scale over a couple of weeks, which is far more reliable than any formula.

Step 2: Set a sensible deficit

Once you have a maintenance number, weight loss is just maintenance minus a deficit. The sweet spot for most people is 300 to 500 calories below maintenance per day, which works out to roughly 0.5 to 1 pound of fat loss per week.

Using our example above: 2,300 maintenance minus a 500-calorie deficit gives a target of about 1,800 calories a day to lose close to a pound a week. That's a pace that's noticeable on the scale but gentle enough to live with.

It's tempting to slash much harder to speed things up, but extreme deficits tend to backfire:

• You lose more muscle, not just fat, which lowers your metabolism and makes the weight easier to regain.
• You're hungry, tired, and irritable, which makes you far more likely to quit or binge.
• Adherence collapses. A target you can't sustain isn't a faster path — it's a slower one with extra steps, because the diet you abandon doesn't work at all.

A moderate deficit you can hold for months beats an aggressive one you bail on in ten days. Slow and steady genuinely wins here, because the goal isn't to lose weight this week — it's to keep it off next year.

Step 3: Hit your target consistently

Here's the part the calculators don't tell you: knowing your number is the easy part. Hitting it day after day is where weight loss is actually won or lost. The math is settled in five minutes. The challenge is the next three months of logging your food accurately enough to know whether you're really in a deficit.

This is why so many people "eat in a deficit" and don't lose weight — they're not actually in one. They under-log. The handful of nuts, the splash of oil, the bites off someone else's plate, the weekend that quietly undoes the week. None of it feels like much, and all of it adds up. The fix isn't more willpower; it's a logging habit that's easy enough to keep every single day.

That's exactly why the way you track matters so much. If logging a meal is a chore, you'll skip the meals you'd rather not see — and those are usually the ones that matter most. Fast, low-friction logging (snap a photo, say it out loud, scan a barcode) keeps your record honest because it stays effortless. Pair that with a trend line you check weekly, and you can see whether your real intake is matching your target — and adjust your TDEE estimate if the scale isn't moving as expected.

Watching the trend, not the daily noise, is the skill. Weight bounces around day to day with water and food in your system; what you care about is the direction over two to four weeks. If you're consistently logging and the trend is flat, your real deficit is smaller than you think — eat a little less or move a little more. If it's dropping faster than a pound a week and you feel wrecked, ease up. The data tells you what to do, but only if the data is complete.

Common mistakes

Most stalled weight loss comes down to a few predictable traps:

• Under-logging. The biggest one by far. Forgotten bites, eyeballed portions, and "I'll log it later" (you won't) quietly erase your deficit. Log everything, log it as you eat it, and edit portions honestly.
• The weekend reset. Five disciplined days plus two loose days can net out to zero. A 1,000-calorie surplus on Saturday and Sunday can wipe out a careful 500-a-day deficit from Monday to Friday. Weekends count.
• Cutting too hard. Setting a 1,200-calorie target when you'd thrive at 1,700 feels productive for a week and then collapses. Choose a deficit you can actually sustain.
• Trusting the formula over the scale. Your TDEE estimate is a starting guess. If two weeks of consistent logging shows no movement, the number was off — adjust it instead of assuming the math is wrong.
• Chasing daily fluctuations. A 2-pound jump overnight is water, not fat. React to the multi-week trend, not the morning's reading.

Get the number roughly right, then win on consistency. If calorie counting has felt like too much effort to keep up before — and for most people, that's the real reason it failed — read why calorie tracking feels tedious for how to make it stick. And if you want a tool that removes enough friction to keep you logging, here's our tested ranking of the best AI calorie counter apps.