How many calories do you need per day?

A calorie is a unit of energy, not a score for how well you ate. Your body needs energy for everyday functions as well as movement, and a population average is not a personal target.

Use averages as context, not instructions

The NHS gives average daily amounts of 2,000 calories for women and 2,500 for men to maintain a healthy weight. These are broad reference figures. They cannot account for every person's body size, age, activity, health or circumstances. A calorie equation should not be treated as a precise prescription. [1]

The useful first question is what you need help with: fuelling activity, understanding labels or changing weight for a health reason. A GP or registered dietitian can help when an individual target matters. This page does not set a calorie deficit. [1]

Read the portion as well as the number

Packaging often lists energy as kcal per 100g or 100ml and per portion. Check which figure you are reading and whether the suggested portion matches what you actually eat. Labels are estimates that help comparison, not a demand to measure every meal. [1]

Keep food quality in the picture

The NHS recommends variety across food groups, higher-fibre starchy foods, and fruit and vegetables. Two meals with similar energy can offer different nutrients. Regular movement is part of looking after health, but exercise is not something you have to do to earn food. [2] [3]

Know when numbers are the wrong starting point

Speak to a healthcare professional before making weight-loss changes if you have a medical condition, a medically required diet or a current or past eating disorder. If tracking makes you anxious or preoccupied, step back from the numbers and ask for support. A general article cannot replace advice for your situation. [1]

Sources and further reading

1. NHS: calories, population averages, food labels and when to seek personal dietary advice.
2. NHS: balanced eating, higher-fibre foods and variety.
3. NHS: adult activity guidelines and adapting activity to your ability.

General information, not a diagnosis or personal treatment plan. Recovapro sells recovery devices. Reviewed 14 November 2026.