The number of calories you should eat per day depends on your body, your activity level, and your goal. There is no single number that works for everyone — the "2,000 calories per day" you see on food labels is an average reference, not a personal recommendation. But there is a reliable way to find your number, and this guide walks through exactly how.
By the end of this article, you'll know how to calculate your personal calorie target, how to adjust it based on whether you want to lose, maintain, or gain weight, and how to troubleshoot when the scale isn't moving the way you expect.
The Short Answer
Calculate your TDEE (Total Daily Energy Expenditure), then adjust based on your goal:
- To lose weight: Eat 500 calories below your TDEE (~1 lb/week loss)
- To maintain weight: Eat at your TDEE
- To gain muscle: Eat 300-500 calories above your TDEE (a small surplus)
Calculate your TDEE here— it takes 10 seconds.
What Determines Your Calorie Needs?
Four main factors affect how many calories your body burns each day:
1. Body size
Larger bodies burn more calories at rest. A 200 lb person burns significantly more than a 130 lb person doing the exact same activities, because there's more tissue to maintain. This is why calorie needs must be personalized — generic recommendations miss by wide margins at the extremes.
2. Age
Metabolism slows by about 1-2% per decade after your mid-20s, primarily due to muscle loss (sarcopenia). A 40-year-old needs fewer calories than a 25-year-old of the same size and activity level. The good news: resistance training can largely offset this decline by preserving muscle mass.
3. Sex
Men typically have more muscle mass and higher metabolic rates than women of the same weight. This is why men's calorie needs are usually 10-20% higher than women's at similar body weights. It's not fair, but it's biology.
4. Activity level
This is the most variable factor. Someone who exercises daily can burn 500-1,000+ more calories than a sedentary person of the same size. But it's not just formal exercise — it's also "NEAT" (Non-Exercise Activity Thermogenesis), which includes walking, fidgeting, standing, and general movement throughout the day. NEAT alone can vary by 2,000 calories between individuals.
Calorie Ranges by Goal
Here are rough ranges for reference. Your actual number will vary — use the TDEE calculator for a personalized estimate.
For Weight Loss
Most people lose weight steadily eating between 1,500-2,200 calories per day, depending on their size and activity. The key is a moderate deficit — not starvation. A 500 calorie deficit is the sweet spot for most people: fast enough to see progress, sustainable enough to actually maintain.
For context, here are typical weight loss targets:
- 120 lb sedentary woman: ~1,300-1,500 cal/day
- 150 lb active woman: ~1,600-1,800 cal/day
- 180 lb sedentary man: ~1,900-2,100 cal/day
- 200 lb active man: ~2,300-2,600 cal/day
Use our calorie deficit calculator to see your exact target and how long it will take to reach your goal.
For Maintenance
If you're happy with your weight, eat at your TDEE. Most moderately active adults maintain on 2,000-2,800 calories per day. This is broader than people realize — a sedentary 130 lb woman might maintain at 1,800, while an active 200 lb man might maintain at 3,000.
To find your true maintenance, eat at your calculated TDEE for 2-3 weeks while tracking weight weekly. If you're stable within a few pounds, you found it. If you're gaining or losing, adjust by 100-200 calories and try another 2 weeks.
For Muscle Gain
To build muscle, you need a calorie surplus — but not a massive one. A surplus of 300-500 calories above your TDEEis enough to support muscle growth while minimizing fat gain. This is sometimes called a "lean bulk" or "slow bulk."
The old bodybuilding advice to eat huge surpluses (1,000+ over maintenance) is outdated. Research has shown that beyond a moderate surplus, additional calories mostly become fat, not muscle. Muscle gain has a biological speed limit of roughly 0.5-1 pound per month for intermediate lifters, regardless of how much you eat.
Prioritize protein at 1.6-2.2g per kg of body weight during a bulk. Calculate your protein needs here.
Case study: Emma, starting her weight loss journey
Emma is 35, 5'4", weighs 170 lbs, works a desk job, and walks her dog 30 minutes daily. Her TDEE is approximately 2,000 calories. She wants to lose 25 pounds over the next 6 months.
Her plan:
- Daily calorie target: 2,000 − 500 = 1,500 cal/day
- Expected weight loss: ~1 lb/week = 25+ weeks to goal
- Protein target: ~130g/day to preserve muscle in her deficit
- Weekly check-in: Average weight; adjust if losing too fast or too slow
- Monthly recalculation: Drop target by ~50-100 cal as she loses weight
This is a realistic, sustainable plan. No extreme restriction, no eliminating entire food groups, just consistent execution of reasonable numbers.
Common Mistakes That Throw Off Your Calorie Math
1. Using generic calorie targets
"1,200 calories for women, 1,500 for men" is generic advice that fits almost nobody accurately. Your needs could be 1,600 or 2,400 depending on your specifics. Always personalize.
2. Not adjusting over time
Your calorie needs change as your weight changes. Someone losing 30 lbs will find their TDEE has dropped by 300-500 calories. If you keep eating the same amount that worked at 200 lbs when you're now 170 lbs, you'll stall. Recalculate every few weeks.
3. Eating too little
Going below 1,200 calories for women or 1,500 for men causes several problems: muscle loss, metabolic adaptation, energy crashes, intense hunger that breaks adherence. Aggressive deficits rarely work better than moderate ones over the long term.
4. Ignoring macros
2,000 calories of mostly protein and vegetables will produce very different results than 2,000 calories of mostly carbs and fat. Calorie count determines whether you lose weight; macro split determines whether it's fat or muscle you're losing. Plan your macrosonce you've set your calorie target.
5. Underestimating "little" calories
The small stuff adds up fast. A splash of cream in coffee, a handful of nuts, a tablespoon of olive oil in cooking, a spoonful of peanut butter — these "invisible" calories are often 200-400 cal/day that people forget to count. If your deficit isn't working, audit these first.
6. Weekend drift
Many people track meticulously Monday through Friday, then eat whatever on Saturday and Sunday. If you eat 300 calories over your target on weekends, you've erased most of your weekly deficit. Weight loss requires weekly consistency, not just weekday consistency.
How to Verify Your Calorie Target Is Right
The calculated number from a TDEE calculator is an estimate. Your actual calorie needs might be 10-15% higher or lower due to individual variation. Here's how to validate:
- Calculate your TDEE and adjust for your goal (subtract for loss, add for gain, leave alone for maintenance).
- Eat at that target for 2-3 weeks with consistent, accurate tracking (weigh food, don't eyeball).
- Weigh yourself at the same time daily, usually first thing in the morning after using the bathroom.
- Calculate your weekly average weight to smooth out daily fluctuations.
- Compare Week 1 average to Week 3 average. A drop of 1-2 lbs = you're on track for weight loss. Stable = you're at maintenance. Gaining 0.5-1 lb = you're at a lean surplus.
- Adjust by 100-200 calories if results don't match your goal, then repeat.
This iterative approach is more reliable than any calculator because it uses your real-world data. The calculator gets you close; your scale verifies.
When to Change Your Calorie Target
Your calorie target isn't static. Reset when:
- You've lost 10-15 lbs. Your TDEE has dropped; your target should drop too.
- You've gained 10-15 lbs of muscle. Your TDEE has increased; eat more.
- Your activity level changes significantly. New job, new exercise routine, injury — all shift your TDEE.
- You transition between goals. Going from cutting to maintenance to bulking — each phase needs a different target.
- Age crosses a decade. Small adjustment, but worth considering every 10 years.
Your Action Plan
- Calculate your TDEE
- Adjust based on your goal: subtract 500 if losing, add 300-500 if gaining, or eat at TDEE to maintain
- Set your macro split to get the right balance of protein, carbs, and fat
- Track food for 2-3 weeks using MyFitnessPal or Cronometer
- Weigh yourself daily, track the weekly average
- Adjust calories by 100-200 if results don't match your expectations
- Recalculate every 10-15 lbs of weight change
Calorie management isn't rocket science, but it does require personalization and patience. The math gets you started — your scale tells you the truth.