You want to lose weight, and you know calories matter. But how many should you actually eat? The answer is different for everyone — and it depends on a few things you can figure out in about five minutes.
No guesswork needed. Just some simple math.
What Determines Your Calorie Needs
Your body burns calories just to keep you alive — breathing, pumping blood, maintaining body temperature. This is your Basal Metabolic Rate (BMR). For most people, BMR accounts for 60-70% of all the calories they burn in a day.
On top of that, you burn calories through daily movement: walking, cooking, fidgeting, exercising. When you add BMR plus all your activity together, you get your Total Daily Energy Expenditure (TDEE).
TDEE is the number of calories your body burns in a full day. It's the starting point for everything.
- A sedentary woman (desk job, little exercise) might have a TDEE around 1,800 calories
- A moderately active man (exercises 3-4 times per week) might burn around 2,500 calories
- A very active person (physical job + regular training) could burn 3,000+ calories
To lose weight, you need to eat fewer calories than your TDEE. That gap between what you eat and what you burn is called a calorie deficit.
The 500-Calorie Rule
One pound of body fat contains roughly 3,500 calories. So if you eat 500 fewer calories per day than your body needs, you'll lose about one pound per week.
Say your TDEE is 2,200 calories. To lose one pound per week, you'd eat 1,700 calories per day. To lose 1.5 pounds per week, you'd eat 1,450 calories per day.
That's it. No magic foods, no special timing, no tricks. A consistent calorie deficit is the only thing that makes your body use stored fat for energy.
A 500-calorie deficit is a solid sweet spot for most people — it's large enough to see real results on the scale but small enough that you won't feel miserable. If you're not sure where to start cutting, here are 5 practical ways to cut 500 calories a day without overhauling your entire diet.
Minimum Safe Calories
More is not always better when it comes to cutting calories. Going too low backfires.
Most nutrition guidelines set the floor at 1,200 calories per day for women and 1,500 calories per day for men. Below these levels, it becomes very difficult to get enough vitamins, minerals, protein, and fiber to keep your body functioning well.
What happens when you eat too little:
- You lose muscle along with fat, which slows your metabolism
- Energy and concentration drop, making you less active (so you burn fewer calories overall)
- Hunger hormones spike, leading to binge eating and a cycle of restrict-then-overeat
- Your body adapts by reducing non-essential processes — lower body temperature, worse recovery, hormonal disruption
A person with a TDEE of 2,000 shouldn't try to eat 1,000 calories a day "to lose weight faster." They'll lose some weight initially, then stall, feel terrible, and likely regain everything. A 1,500-calorie target would produce steady, sustainable results instead.
How to Find YOUR Number
Step 1: Calculate your TDEE
Use our Daily Calorie Intake Calculator to find your maintenance calories. You'll need your age, height, weight, and a rough idea of how active you are.
Step 2: Subtract 500 calories
Take your TDEE and subtract 500. That's your daily calorie target for losing about one pound per week. If you want a slower, more comfortable approach, subtract 250 instead (half a pound per week).
Step 3: Check against the minimums
If your target falls below 1,200 (women) or 1,500 (men), set it at the minimum and accept a slower rate of loss. Your health matters more than speed.
Step 4: Track consistently for 2-3 weeks
Use a food tracking app and learn how to count calories accurately. Weigh yourself at the same time each day (morning, after bathroom) and look at the weekly average — not day-to-day fluctuations.
Step 5: Adjust based on real results
After 2-3 weeks of consistent tracking, check what actually happened. Losing 1-2 lbs per week? You're on target. Not losing anything? You're eating at maintenance — drop another 100-200 calories. Losing more than 2 lbs per week? You can afford to eat a bit more.
You can also use our Weight Loss Calculator to see how long it will take to reach your goal weight at different deficit levels.
How Fast Should You Lose Weight?
The CDC, NHS, and most dietitians agree: 1-2 pounds per week is a safe, sustainable rate of weight loss for most people.
That might not sound exciting, but consider this: losing 1.5 lbs per week means roughly 6 lbs per month, 18 lbs in three months, and nearly 40 lbs in six months. That's a dramatic change — and you're far more likely to keep it off compared to a crash diet.
A realistic example: Sarah weighs 180 lbs and wants to get to 150 lbs. Her TDEE is about 2,100 calories. She eats 1,600 calories per day (a 500-calorie deficit). At 1 lb per week, she'll reach her goal in about 30 weeks — roughly 7 months. She stays energized, keeps her muscle, and never feels like she's starving.
When to Adjust Your Calories
Metabolic adaptation
As you lose weight, your body gets smaller and needs fewer calories to operate. A person at 200 lbs burns more calories than that same person at 170 lbs. Your deficit naturally shrinks over time unless you adjust.
What to do: Recalculate your TDEE with the Daily Calorie Intake Calculator every 10-15 lbs lost, and set a new target.
The plateau
If your weight hasn't budged in 3+ weeks and you're confident your tracking is accurate, try one of these:
- Reduce daily intake by 100-150 calories
- Add one extra day of walking per week (increasing your TDEE instead of cutting food)
- Take a diet break — eat at maintenance for 1-2 weeks, then resume your deficit
Common Mistakes That Stall Weight Loss
Eating too little. Extreme restriction leads to muscle loss, metabolic slowdown, and eventual binge eating. A moderate deficit beats an aggressive one every time.
Not counting liquid calories. A large latte with whole milk and syrup can be 300+ calories. Two glasses of wine at dinner? Another 250. These add up fast and people routinely forget to track them.
The weekend blowout. Eating 1,600 calories Monday through Friday, then 3,000 on Saturday and 2,800 on Sunday is not a 1,600-calorie diet. Your weekly average is about 2,000 — which might be right at your maintenance level.
Eyeballing portions. "A tablespoon of peanut butter" scooped loosely can easily be two tablespoons — that's an extra 95 calories from one snack. A food scale costs $10-15 and pays for itself immediately.
Ignoring protein. Getting enough protein (roughly 0.7-1g per pound of body weight) helps preserve muscle during weight loss, keeps you full longer, and has a higher thermic effect.
The Bottom Line
Finding the right calorie target for weight loss comes down to three steps: know your TDEE, subtract 500, and stay consistent. That's the entire strategy.
Don't overthink it, don't starve yourself, and don't expect overnight results. A 500-calorie daily deficit produces about one pound of fat loss per week — and that adds up to serious, lasting change over a few months.
Start by plugging your numbers into our Daily Calorie Intake Calculator to find your personal target.
