The answer to "how many calories should I eat per day" is not 2,000. That number — printed on every food label — is a population average that fits almost nobody perfectly. Your actual daily calorie need is determined by your body size, age, gender, and how much you move.
Why Generic Calorie Advice Fails
A sedentary 55-year-old woman weighing 60kg needs roughly 1,600 calories to maintain her weight. A 28-year-old male construction worker weighing 90kg needs closer to 3,400. A single "2,000 calories" recommendation cannot serve both. Generic advice leads to under-eating for some, over-eating for others, and confusion for everyone.
How to Find Your Personal Number
Your daily calorie target is your TDEE adjusted for your goal. Calculate it in three steps:
1️⃣ Calculate BMR — your resting calorie burn using the Mifflin-St Jeor formula
2️⃣ Multiply by activity factor — 1.2 (sedentary) to 1.9 (extremely active)
3️⃣ Adjust for goal — subtract for fat loss, maintain for weight stability, add for muscle gain
Typical Daily Calorie Ranges by Goal
| Goal | Women (avg) | Men (avg) |
|---|---|---|
| Fat loss | 1,400 – 1,800 | 1,800 – 2,400 |
| Maintenance | 1,800 – 2,200 | 2,200 – 3,000 |
| Muscle gain | 2,000 – 2,500 | 2,600 – 3,400 |
These are ranges, not targets. Your number depends entirely on your personal TDEE.
Calories vs. Food Quality
Calorie quantity determines weight change. Food quality determines body composition, health, and how you feel. 1,800 calories of whole foods produces very different outcomes than 1,800 calories of processed food — same weight change, very different health impact. Track calories for weight goals, but prioritise protein, vegetables, and whole grains for health.
Protein: The Most Important Calorie
Of all macronutrients, protein has the most impact on body composition. It preserves muscle during fat loss, increases satiety, and has the highest thermic effect — meaning your body burns more calories digesting it. Aim for 1.6–2.2g of protein per kg of bodyweight regardless of your calorie goal. This is the one target that matters more than total calories for most people.
Adjust Based on Results, Not Estimates
No formula predicts your metabolism perfectly. Track your weight daily for 2 weeks after setting your calorie target. If weight is not moving in the expected direction, adjust by 150–200 calories and reassess after another 2 weeks. The formula gets you close — your results tell you exactly where to go.