How many calories should I eat per day?

UK guidelines reference 2,000 kcal/day for an average adult woman and 2,500 for an average adult man, but real needs vary widely with body size, activity level, age, and life stage. Treat the label values as population averages, not personal targets.

Are all calories the same?

Energetically, yes, a calorie is a unit of energy. But 200 kcal from a soft drink and 200 kcal from an apple have very different effects on satiety, blood sugar, and long-term metabolic health.

What food has the most calories per gram?

Fat carries about 9 kcal/g, more than double protein and carbohydrate (4 kcal/g each) and just above alcohol (7 kcal/g). Oils, nuts, and fatty meats are the most calorie-dense foods.

Do I need to count calories to manage weight?

Calorie balance ultimately drives weight change, but tracking isn't the only path. Many people achieve the same result by eating mostly whole foods and paying attention to satiety cues. The right method is whichever you can sustain.

Foods high in Calories

Total food energy. 1 kcal = 4.184 kJ, what gets burned in metabolism or stored.

About Calories

Calories measure the energy a food provides, the units packed into its carbohydrates, fats, proteins, and alcohol. They're the bottom line of weight balance: take in more than you spend and you store the excess; spend less than you take in and the body draws on reserves.

UK guidelines use 2,000 kcal/day for an average adult woman and 2,500 kcal/day for a man as the reference values on packaged-food labels, these are population averages, not personal targets. Real needs vary widely with body size, activity level, age, and life stage.

The quality of calories matters as much as the total. Two hundred calories from an apple affect satiety, blood sugar, and long-term metabolic health very differently from 200 calories of soft drink, even though the labels look identical.

Foods high in calories, butter, udi's, udi's, and more

Ranked by how much you get per calorie, so foods are not rewarded for simply being dry or concentrated. Values from USDA FoodData Central, McCance & Widdowson's CoFID, ANSES Ciqual, and other public nutrition databases. Amounts in kilocalories.

Per calorie is the default here because it answers what to eat: ranked purely by amount, a list of the richest foods fills up with dried and concentrated things nobody eats a plateful of. Switch to per 100 grams above if concentration is what you are after. Our foods low in calories list is measured per 100 grams instead, and that is deliberate too: per calorie would reward a food for carrying plenty of energy and none of the nutrient, which puts cooking oil below lettuce on a low-sodium list.

Need to cut back? See foods low in Calories

Common questions about Calories

How many calories should I eat per day?: UK guidelines reference 2,000 kcal/day for an average adult woman and 2,500 for an average adult man, but real needs vary widely with body size, activity level, age, and life stage. Treat the label values as population averages, not personal targets.
Are all calories the same?: Energetically, yes, a calorie is a unit of energy. But 200 kcal from a soft drink and 200 kcal from an apple have very different effects on satiety, blood sugar, and long-term metabolic health.
What food has the most calories per gram?: Fat carries about 9 kcal/g, more than double protein and carbohydrate (4 kcal/g each) and just above alcohol (7 kcal/g). Oils, nuts, and fatty meats are the most calorie-dense foods.
Do I need to count calories to manage weight?: Calorie balance ultimately drives weight change, but tracking isn't the only path. Many people achieve the same result by eating mostly whole foods and paying attention to satiety cues. The right method is whichever you can sustain.