How Many Calories Should I Eat Per Day?
Get a personalised answer based on your age, gender, weight, height, activity level, and goal.
"How many calories should I eat per day?" is one of the most searched nutrition questions on the internet — and the answer is genuinely different for every person. Generic advice like "eat 2,000 calories" ignores the factors that actually determine your needs: body size, age, sex, activity level, and your goal. This guide walks you through how to find your personal number. Every number in this guide can be reproduced with the calorie calculator, TDEE calculator and the macro calculator — open them alongside as you read.
General calorie guidelines by age and gender
The following ranges come from dietary guidelines and apply to moderately active individuals at average heights and weights. They are starting points, not personal prescriptions.
- Men aged 19–30: 2,600–2,800 calories/day
- Men aged 31–50: 2,400–2,600 calories/day
- Men aged 51+: 2,200–2,400 calories/day
- Women aged 19–30: 2,000–2,200 calories/day
- Women aged 31–50: 1,800–2,000 calories/day
- Women aged 51+: 1,600–1,800 calories/day
These figures decrease as we age primarily because muscle mass naturally decreases, lowering the basal metabolic rate.
How to find your personal calorie target in 3 steps
Step 1: Calculate your BMR (Basal Metabolic Rate) using the Mifflin-St Jeor equation:
- Men: BMR = (10 × kg) + (6.25 × cm) – (5 × age) + 5
- Women: BMR = (10 × kg) + (6.25 × cm) – (5 × age) – 161
Step 2: Multiply by your activity level to get your TDEE (maintenance calories):
- Sedentary (desk job, no exercise): × 1.2
- Lightly active (1–3 workouts/week): × 1.375
- Moderately active (3–5 workouts/week): × 1.55
- Very active (6–7 workouts/week): × 1.725
Step 3: Adjust for your goal:
- Weight loss: TDEE – 300 to 500 calories
- Maintenance: TDEE
- Muscle gain: TDEE + 200 to 300 calories
Worked example – 35-year-old man, 80 kg, 178 cm, lightly active
BMR = (10 × 80) + (6.25 × 178) – (5 × 35) + 5 = 800 + 1,112.5 – 175 + 5 = 1,742.5 calories
TDEE = 1,742.5 × 1.375 = 2,396 calories/day to maintain weight
For gradual weight loss: 2,396 – 400 = 1,996 calories/day
Why 1,200 calories is too low for most people
Many popular diet plans default to 1,200 calories for women and 1,500 for men. For most adults, these levels are below what's needed to meet daily protein, vitamin, and mineral requirements without supplementation. Eating at these levels long-term leads to muscle loss, fatigue, hair thinning, hormonal disruption, and metabolic slowdown. A 300–500 calorie deficit from your TDEE is almost always preferable to an arbitrary low ceiling.
Calories are not equal – food quality matters
Two people can eat the same calorie amount with dramatically different health outcomes depending on what those calories come from. 1,800 calories from whole foods (vegetables, lean proteins, whole grains, healthy fats) supports energy, gut health, and satiety. 1,800 calories from ultra-processed foods (chips, biscuits, sugary drinks) may meet the calorie target but causes hunger, blood sugar swings, and nutritional gaps.
How hunger, weight loss speed, and adherence interact
The best calorie target is one you can actually maintain for months. Extreme deficits (800–1,000 calories below TDEE) produce fast initial results but are almost universally abandoned due to hunger, fatigue, and social friction. A moderate 300–500 calorie deficit creates progress you can sustain for 12–24 weeks — which produces better long-term outcomes even if the weekly loss looks slower.
Calorie cycling – a flexible approach
Rather than eating the same number of calories every day, some people prefer calorie cycling — eating more on workout days and less on rest days, while the weekly average still hits the target deficit. This approach can improve workout performance and reduce the monotony of rigid daily targets. When you finish here, the guides on how to calculate body fat percentage and how to calculate GST continue the series.
Frequently asked questions about daily calorie intake
How many calories should I eat to lose weight? Eat 300–500 fewer calories than your TDEE per day. This creates approximately 0.3–0.5 kg of fat loss per week — sustainable and realistic.
How many calories should an average woman eat per day? Most moderately active women need 1,800–2,200 calories per day to maintain weight. This varies significantly with size and activity level.
Is 1,200 calories a day enough? For most adults, 1,200 calories is below the minimum to meet nutritional needs. It is not recommended as a long-term approach unless supervised by a doctor or dietitian.
Why there is no single answer
The frequently cited "2,000 calories for women, 2,500 for men" is a population average designed for food labelling purposes — not a prescription for any individual. Your personal calorie requirement depends on your specific height, weight, age, body composition, activity level, and goal. Using a generic figure without personalising it is one of the most common reasons people's calorie targets fail to produce the expected results.
Your personalised calorie target in three steps
Step 1 — Find your BMR (Mifflin-St Jeor equation, most validated for adults):
- Men: BMR = (10 × weight kg) + (6.25 × height cm) – (5 × age) + 5
- Women: BMR = (10 × weight kg) + (6.25 × height cm) – (5 × age) – 161
Step 2 — Multiply by activity factor to get TDEE (maintenance calories):
- Sedentary: × 1.2 | Lightly active: × 1.375 | Moderately active: × 1.55 | Very active: × 1.725
Step 3 — Adjust for goal:
- Fat loss: TDEE – 300 to 500 calories
- Maintenance: eat at TDEE
- Lean muscle gain: TDEE + 200 to 300 calories with high protein
Worked example — 40-year-old man, 85 kg, 180 cm, lightly active:
BMR = (850 + 1125 – 200 + 5) = 1780. TDEE = 1780 × 1.375 = 2447 cal. Fat loss target: 2447 – 400 = 2,047 calories/day
Recommended daily calorie intake by age and gender
- Men 19–30: 2,600–2,800 kcal (moderately active)
- Men 31–50: 2,400–2,600 kcal (moderately active)
- Men 51+: 2,200–2,400 kcal (moderately active)
- Women 19–30: 2,000–2,200 kcal (moderately active)
- Women 31–50: 1,800–2,000 kcal (moderately active)
- Women 51+: 1,600–1,800 kcal (moderately active)
These decline with age primarily because lean muscle mass decreases with age (sarcopenia), which lowers BMR. Resistance training is the most effective strategy to preserve metabolic rate as you age.
Why the 1,200-calorie myth is harmful
Many popular diet apps and plans default to 1,200 calories for women. For the average adult woman with a TDEE of 1,800–2,200 calories, eating 1,200 creates an extreme deficit of 600–1,000 calories per day. While this produces rapid initial weight loss, it comes with serious costs: accelerated muscle loss (which permanently lowers metabolic rate), nutrient deficiencies requiring supplementation, fatigue, hair thinning, disrupted menstrual cycles, and a high rebound rate when the diet ends.
A 300–500 calorie deficit from your TDEE produces 0.3–0.5 kg of fat loss per week — slower but sustainable, with muscle preserved and adherence dramatically higher.
Macronutrient priorities within your calorie target
- Protein first (1.6–2.2 g/kg bodyweight): Preserves muscle during fat loss, most satiating macronutrient, highest thermic effect
- Fat second (0.8–1 g/kg minimum): Essential for hormonal health, fat-soluble vitamin absorption, satiety
- Carbohydrates with remaining calories: Primary fuel for high-intensity exercise and brain function; prioritise quality (vegetables, whole grains, fruit) over processed sources
Calorie cycling — a flexible alternative
Rather than eating the same calories daily, calorie cycling eats more on training days and less on rest days while the weekly average stays at the target deficit. On a 2,000-calorie average: 2,300 on 3 training days, 1,800 on 4 rest days. This approach improves workout performance and psychological adherence for many people.
Why calorie needs vary so much between people
Two people the same height and weight can have daily calorie needs differing by 300–600 kcal based on: muscle mass (each kg of muscle burns ~13 kcal/day at rest), thyroid function (hypothyroidism can reduce BMR by 20–30%), activity occupation (a labourer burns 1,000+ kcal more per day than a desk worker of the same weight), and genetics (a real but smaller factor than most people believe — typically ±5–10%). This is why two office workers eating the same food can have very different body weight outcomes over years. Use our TDEE calculator for your personalised estimate accounting for all these factors.
Calorie deficit timing: does it matter when you eat?
Total daily calorie intake matters far more than meal timing for weight management. However, timing affects satiety and adherence: front-loading calories (larger breakfast and lunch, smaller dinner) is associated with higher satiety and less total daily intake in controlled studies. Intermittent fasting (16:8 or similar) works primarily by restricting the eating window, which for most people reduces total calories. For athletic performance, eating carbohydrates before and protein after training optimises muscle adaptation — but these are secondary considerations compared to total intake.
Calorie cycling: eating more on some days and less on others
Calorie cycling (or zigzag dieting) alternates between higher and lower calorie days while keeping the weekly total at a deficit. The theory: higher calorie days prevent metabolic adaptation and maintain muscle mass; lower calorie days create the deficit. Example for a person with a 2,200 kcal TDEE targeting a 500 kcal/day deficit (weekly = 3,500 kcal): High days (3 per week): 2,000 kcal. Low days (4 per week): 1,600 kcal. Weekly total: 3×2,000 + 4×1,600 = 12,400 kcal vs 7×1,700 = 11,900 kcal target — similar total, different distribution. Evidence for calorie cycling is mixed — it works primarily through improved dietary adherence, not measurably different metabolic effects. Use our calorie calculator and calorie deficit calculator to set your weekly targets.
How many calories does a 70 kg Indian man need per day?
A 70 kg Indian man with moderate activity (desk job, light daily walking) typically needs 2,200–2,500 kcal per day. Use the TDEE calculator with your exact height, age, and activity level for a personalised result.
How many calories should I eat to lose 1 kg per week?
To lose 1 kg per week, you need a 1,000 kcal daily deficit from your TDEE. For most people, a safer target is 500 kcal below TDEE (lose 0.5 kg/week) to preserve muscle mass and maintain sustainable energy levels.
Sources & references
Sources: ICMR-NIN Recommended Dietary Allowances (2024); Mifflin-St Jeor equation, AJCN 1990; WHO technical report on energy requirements.
⚕️ Medical disclaimer: This guide is educational and not a substitute for professional medical advice, diagnosis, or treatment. Reference ranges follow WHO and ICMR published guidelines. Consult a qualified healthcare provider before making health decisions — see our methodology.