How Many Calories Should I Eat to Lose Weight? (2026)

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title: "How Many Calories Should I Eat to Lose Weight? (2026)" description: "A direct answer plus a reference table of daily calorie targets by sex, weight, and activity — based on TDEE math, not myths." publishedAt: "2026-05-19" updatedAt: "2026-05-19" author: "Inlab Products" tags: ["how many calories to lose weight", "daily calorie intake", "weight loss", "calorie deficit"] keyTakeaways:

• "Most adults should eat 15–25% below their TDEE to lose weight sustainably. That's typically 300–700 kcal/day below maintenance."
• "Generic 1,500-kcal-for-women / 2,000-kcal-for-men recommendations are too broad — your number depends on age, weight, height, and activity."
• "Going below your BMR usually backfires. Slower loss with more protein retains more muscle and is easier to keep off."
• "Adjust based on your actual weight trend over 2–3 weeks, not online formulas." faq:
• question: "Is 1,200 calories a day enough to lose weight?" answer: "For some petite, low-activity adults, 1,200 kcal is appropriate. For most adults — especially men, taller women, and active people — 1,200 is below BMR and leads to muscle loss, fatigue, and binge-rebound cycles. Use a TDEE-based target instead."
• question: "How quickly can I expect to lose weight?" answer: "0.5–1% of body weight per week is the sustainable range. For a 75 kg/165 lb adult that's about 0.4–0.75 kg (1–1.6 lb) per week. Faster than this means more muscle and water loss."
• question: "Why am I in a deficit but not losing weight?" answer: "Most common: under-tracking (people under-log by 20–40% on average), overestimating exercise burn (fitness watches inflate 20–40%), or your real TDEE is lower than the formula predicts. Check your weekly weight average, not single-day readings, before concluding the deficit isn't working. See the full diagnostic in calorie deficit but not losing weight — 11 real reasons."
• question: "Should I eat back calories burned from exercise?" answer: "Eat back ~50% of what your watch reports — most consumer wearables overestimate exercise calories by 20–40%. For walking and easy cardio, eat back only ~25%. Strength training is harder to estimate; assume ~5 kcal/min for moderate sessions."

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If you came here from Google, you want a number and a quick reason. Here it is.

The 30-second answer

Eat 15–25% below your TDEE. For most adults that's a daily target between 1,400 and 2,200 kcal, depending on your size and activity. Use the calorie deficit calculator to get your exact number.

If you'd rather skim a table than do math:

Daily calorie targets — quick reference

These assume a 20% deficit (recommended starting point) and use Mifflin-St Jeor BMR plus a moderate-activity multiplier (1.55).

Women, moderate activity

Men, moderate activity

For sedentary (desk job, no exercise), subtract ~15%. For very active (6+ days/week training), add ~10%.

Why "1,500 for women, 2,000 for men" is a myth

The persistent "all women should eat 1,500 / all men should eat 2,000" advice comes from FDA Daily Value labeling, which uses a single round number for general public. It's averaged across all adults — not a personalized recommendation.

A 25-year-old, 75 kg, 170 cm woman who lifts weights three times a week needs ~2,200 kcal at maintenance, not 1,500. A 55-year-old, 55 kg, 158 cm sedentary woman needs ~1,650 at maintenance. Same broad "all women" label, ~550 kcal/day spread. The label doesn't fit either of them.

Don't go below your BMR

A common mistake: target so deep that daily calories drop below BMR (the energy your body burns at rest). When that happens, several things stack up:

• Metabolic adaptation — BMR drops faster than the formulas predict, partially erasing the deficit.
• Lean mass loss — muscle gets consumed for energy, lowering BMR further.
• Hunger hormones — leptin drops, ghrelin rises, you become harder to satisfy by food.
• Mood and sleep — both downstream of the same hormonal cascade.

If your TDEE − 25% lands below your BMR, eat closer to BMR and lose more slowly. The slower path leaves you with more muscle and less rebound risk.

What about exercise?

Don't eat back the full "calorie burn" your watch reports. Most consumer wearables overestimate exercise calorie burn by 20–40% (Shcherbina et al., 2017).

Rule of thumb:

• Walking: eat back ~25% of reported burn.
• Easy cardio / yoga: eat back ~30%.
• Hard interval training / running: eat back ~50%.
• Strength training: assume ~5 kcal/minute for moderate-effort sessions; don't add anything for warm-up time.

How to know if the target is right

Track your weight daily, take the weekly average, and check after 2–3 weeks:

Don't react to single-day readings. Daily weight swings ±1 kg from water, sodium, glycogen, and (for women) cycle phase.

The single biggest mistake

Most people who "track calories" under-log by 20–40% — they forget the cooking oil, the sip of juice, the handful of chips, the bites of someone else's dessert. The deficit on paper looks bigger than the deficit in reality.

Two ways to fix this:

1. Log everything that has calories, including liquids and bites. "Tasting" the pasta sauce three times is 30 kcal. A glass of wine is 150. Bites of someone's dessert: 50. They add up.
2. Pre-log the day. Sketch tomorrow's meals tonight. Pre-logging cuts tracking error by ~50% in our user data because it removes the "I forgot to log" failure mode.

How Callie sets your number

Tell Callie your stats and your timeline. The AI sets your daily target using Mifflin-St Jeor + activity multiplier, applies a deficit matched to your timeline, and re-tunes every 2 weeks based on your actual weight trend. You don't have to recompute.

If you log meals by photo, voice, or text — instead of database search — under-logging drops sharply because there's no friction.

Related reading

• Calorie Deficit Calculator & Complete Guide — full TDEE walkthrough.
• How to Lose Weight With a Calorie Tracker — pillar guide with plateaus, protein, and behavior.
• Healthy Weight Gain: A Guide for Hard Gainers — the surplus side, for completeness.

Sources

1. Mifflin MD, et al. (1990). "A new predictive equation for resting energy expenditure in healthy individuals." Am J Clin Nutr.
2. Shcherbina A, et al. (2017). "Accuracy in Wrist-Worn, Sensor-Based Measurements of Heart Rate and Energy Expenditure in a Diverse Cohort." https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5524096/
3. NIH Body Weight Planner. https://www.niddk.nih.gov/bwp
4. Lichtman SW, et al. (1992). "Discrepancy between self-reported and actual caloric intake and exercise in obese subjects." N Engl J Med 327(27):1893-1898.