The number of calories you should eat each day depends on several personal factors — your age, sex, height, weight, and how active you are. There is no single answer that works for everyone. However, understanding how to calculate your personal calorie needs is one of the most useful things you can do for your health and weight management.
As a rough starting point, general daily calorie guidelines by sex are:
| Group | Sedentary | Moderately Active | Very Active |
|---|---|---|---|
| Adult women | 1,600 – 1,800 | 1,800 – 2,200 | 2,200 – 2,400 |
| Adult men | 2,000 – 2,200 | 2,400 – 2,800 | 2,800 – 3,200 |
Important: These are averages. Your actual needs depend on your specific height, weight, age, and activity level. Use our calorie calculator below for a personalised figure.
Typical daily calorie needs by sex and activity level
Calorie needs generally decrease with age, primarily because muscle mass tends to decline and physical activity often reduces. Here are approximate daily calorie needs for moderately active adults by age group:
| Age | Women (moderate activity) | Men (moderate activity) |
|---|---|---|
| 18 – 25 | 2,000 – 2,200 | 2,600 – 2,800 |
| 26 – 35 | 1,900 – 2,100 | 2,400 – 2,600 |
| 36 – 50 | 1,800 – 2,000 | 2,200 – 2,400 |
| 51 – 65 | 1,700 – 1,900 | 2,000 – 2,200 |
| 65 and over | 1,600 – 1,800 | 1,800 – 2,000 |
Eat at your TDEE (Total Daily Energy Expenditure) — the total calories your body burns in a day including all activity. Our calorie calculator computes this for you based on your personal details.
Eat 300–500 calories below your TDEE per day. This creates a deficit that leads to approximately 0.3–0.5 kg of fat loss per week — a safe and sustainable rate. Avoid going below 1,200 calories (women) or 1,500 calories (men) without medical supervision.
Eat 200–300 calories above your TDEE per day, combined with consistent strength training. This modest surplus supports muscle growth while minimising unnecessary fat gain.
The 2,000 calorie figure you see on food labels was chosen as a round number for labelling purposes and represents an average for a moderately active adult. In reality, calorie needs vary dramatically:
Using your personal details to calculate your needs gives a far more useful starting point than a generic recommendation.
Your BMR is the calories your body burns at complete rest — just to keep your heart beating, lungs breathing, and cells functioning. It accounts for roughly 60–70% of total daily calorie burn and is largely determined by your body size and composition.
Exercise and daily movement account for 15–30% of total calorie burn. This includes both deliberate exercise (gym, running, sport) and non-exercise activity (walking, fidgeting, standing, household tasks). Many people overestimate calories burned during exercise and underestimate how much daily movement matters.
Digesting food burns calories — typically 5–10% of total daily expenditure. Protein has the highest thermic effect (20–30%), which is one reason high-protein diets are effective for weight management.
The most reliable feedback is your weight trend over 2–4 weeks:
Weigh yourself at the same time each day (morning, after using the bathroom) and look at the weekly average rather than daily fluctuations, which are heavily influenced by water retention.
Next step
Get your TDEE based on your age, weight, height, and activity level.