The short answer
- For most adults, official reference values fall somewhere between about 1,600 and 3,300 calories (kcal) a day, depending on age, sex, body size and, above all, how active you are.
- The NHS says an average man needs around 2,500 kcal and an average woman around 2,000 kcal, and adds straight away that this varies.
- The 2,000 calories on US and UK labels is a reference figure for comparing foods, not a personal recommendation.
- These are population averages: two people of the same age and sex can have very different needs.
- For a figure that applies to you, especially in pregnancy, illness or serious training, talk to a doctor or a registered dietitian.
Where the numbers you keep seeing come from
Three figures turn up everywhere: 2,000, 2,500 and sometimes 1,600 or 3,000. They answer different questions.
The 2,000 on US labels. The Food and Drug Administration explains that “2,000 calories a day is used as a general guide for nutrition advice”, and that your needs may be higher or lower depending on age, sex, height, weight and physical activity. It’s the basis for the % Daily Value column, so that one cereal can be compared with another.
The 2,000 on UK and EU labels. Food law in the UK and the EU allows energy and nutrients to be shown as a percentage of “reference intakes”. When that’s done, the pack must say “Reference intake of an average adult (8 400 kJ/2 000 kcal)”. Same idea: a common yardstick, not a target.
The 2,000 and 2,500 from the NHS. The NHS gives around 2,000 kcal for an average woman and 2,500 kcal for an average man, and notes that the right amount depends on age, weight, height and exercise.
What the new US guidelines say. The Dietary Guidelines for Americans, 2025–2030, published in January 2026, keep it short: “The calories you need depend on your age, sex, height, weight, and level of physical activity.” They use a 2,000-calorie pattern to illustrate food amounts, to be adjusted to individual needs.
Official ranges by age, sex and activity
The most detailed public table comes from the European Food Safety Authority (EFSA), which in 2013 published average energy requirements for four physical activity levels (PAL): 1.4 (low active, sedentary), 1.6 (moderately active), 1.8 (active) and 2.0 (very active). PAL is your total energy use over 24 hours divided by your resting metabolic rate.
EFSA gives the values in megajoules. The table converts them to kcal (1 MJ = 238.83 kcal) and rounds to the nearest 10. Each range runs from “low active” to “very active”.
| Age | Women (PAL 1.4 → 2.0) | Men (PAL 1.4 → 2.0) |
|---|---|---|
| 18–29 | 1,890–2,670 kcal | 2,340–3,340 kcal |
| 30–39 | 1,820–2,580 kcal | 2,270–3,220 kcal |
| 40–49 | 1,790–2,560 kcal | 2,220–3,200 kcal |
| 50–59 | 1,790–2,560 kcal | 2,200–3,150 kcal |
| 60–69 | 1,620–2,320 kcal | 2,010–2,890 kcal |
| 70–79 | 1,620–2,290 kcal | 1,980–2,840 kcal |
18–29
Women (PAL 1.4 → 2.0)1,890–2,670 kcal
Men (PAL 1.4 → 2.0)2,340–3,340 kcal
30–39
Women (PAL 1.4 → 2.0)1,820–2,580 kcal
Men (PAL 1.4 → 2.0)2,270–3,220 kcal
40–49
Women (PAL 1.4 → 2.0)1,790–2,560 kcal
Men (PAL 1.4 → 2.0)2,220–3,200 kcal
50–59
Women (PAL 1.4 → 2.0)1,790–2,560 kcal
Men (PAL 1.4 → 2.0)2,200–3,150 kcal
60–69
Women (PAL 1.4 → 2.0)1,620–2,320 kcal
Men (PAL 1.4 → 2.0)2,010–2,890 kcal
70–79
Women (PAL 1.4 → 2.0)1,620–2,290 kcal
Men (PAL 1.4 → 2.0)1,980–2,840 kcal
Two things stand out. The gap between “low active” and “very active” in each row is roughly 670 to 1,000 kcal, far larger than the change between one decade of age and the next. And these values were calculated for average European heights and a reference body weight, so anyone noticeably taller or shorter than average will sit away from them. EFSA gave no values for people aged 80 and over, for lack of body size data.
France’s food safety agency, Anses, ran a similar exercise in 2016 for French adults with a middle activity level (PAL 1.63) and arrived at about 2,100 kcal a day for women aged 18 to 59 and 2,600 kcal for men aged 18 to 69. Different countries, different assumptions, similar ballpark.
What changes your needs
Body size. Your resting metabolic rate, the energy you use to breathe, keep warm and keep your heart beating, is the biggest share of daily energy use for most people. It depends mostly on height, weight and lean mass.
Age. Resting metabolic rate falls over the decades, which is why the ranges drop after 60. The 2025–2030 US guidelines point out that some older adults need fewer calories but the same or more protein, vitamin B12, vitamin D and calcium, so eating less doesn’t mean needing less of everything.
Physical activity. This is the variable that moves most. In a UK review of 929 healthy adults whose energy use was measured with doubly labelled water, the gold-standard method, the median PAL was 1.63, but a quarter of people were below 1.49 and a quarter above 1.78 (SACN, 2011, as reported by Anses). Even in an “ordinary” population, activity varies a lot.
Pregnancy and breastfeeding. EFSA adds about 70 kcal a day in the first trimester, 260 in the second and 500 in the third, and about 500 kcal during the first six months of breastfeeding. These are averages; antenatal care is the right place to discuss them.
Health. Fever, chronic illness, some medicines and recovery from surgery all change energy use. No population range replaces advice from a clinician in those situations.
Why online calculators disagree with each other
Online calculators estimate resting metabolic rate with an equation (Harris-Benedict, Mifflin-St Jeor, Schofield, Henry and others) and multiply it by an activity factor. The choice of equation alone matters. In the Anses report, the same man aged 18 to 29, at median French height and the same PAL of 1.63, gets anywhere from 2,704 to 2,857 kcal depending on the equation. A woman aged 50 to 59 gets 1,865 to 2,134 kcal. Then comes the bigger uncertainty: how active you say you are.
That’s why health agencies publish averages and ranges rather than personal numbers, and why a calculator result is an order of magnitude, not a prescription. If you need a personal figure, say for endurance sport, pregnancy or a medical condition, a doctor or registered dietitian can take into account what the formulas can’t.
The number on the label is an average too
Even a packet’s calorie figure is an estimate. It’s calculated from the product’s average composition with standard conversion factors: roughly 4 kcal per gram of carbohydrate or protein, 9 per gram of fat and 7 per gram of alcohol. Those factors are averages; they don’t capture batch-to-batch variation or how each person digests food.
Outside packaged food, the gaps can be large. In a 2010 study from Tufts University, researchers measured the energy in foods sold as “reduced-calorie” in the US. The 29 restaurant items contained on average 18% more energy than stated, and the 10 supermarket frozen meals 8% more. Some restaurant items reached 200% of the stated value. It was a small sample, but the lesson is clear: stated figures are approximations.
Add the fact that real portions rarely match the label’s “serving”, and you see why ranges are the honest answer. If you want to go further, our guide to counting calories and its limits covers estimation methods and their measured error rates.
Using these ranges without turning them into a target
The ranges help you understand scale: a can of soda, a muffin or a restaurant main takes up a different share of the day depending on whether you’re nearer 1,800 or 3,000 kcal. They’re not meant to be hit to the calorie every day. Energy use changes from one day to the next, and the US guidelines put the emphasis on the kind of food you eat, with water and unsweetened drinks as the default.
If you want a rough record of what you eat without living by the numbers, an approximate log is often enough. That’s how Binome360 handles meals: you describe or photograph a meal, your assistant suggests an estimate as a range, and you confirm or correct it. The app doesn’t set a calorie target for you.
Lunch was a chicken burrito bowl with rice, beans and guacamole
Meal ready to log. Wide estimate, because rice and guacamole portions change the total a lot. Save it?
Yes
Saved. You can look back at the week’s meals whenever you like.
An estimate, not a goal. Nothing is saved until you confirm.
Try Binome360 for freeIf sugar is your real concern, our step-by-step plan to cut down on sugar starts from WHO and NHS guidance and begins with drinks.
Describe or photograph a meal and your assistant drafts an entry with a range, which you check before saving.
- A meal logged in one sentence or one photo
- A wide estimate rather than a falsely precise number
- No target set for you
- Nothing saved until you confirm
Frequently asked questions
Who is 2,000 calories a day actually for?
It’s a reference figure used on labels so that percentages mean the same thing on every pack. It sits inside the range for a moderately active adult woman, but it wasn’t calculated for you. Depending on your size, age and activity, your needs can be well above or below it.
Do calorie needs really go down with age?
On average, yes. In EFSA’s tables, a moderately active man goes from about 2,670 kcal at 18–29 to about 2,270 kcal at 70–79. But needs for protein, calcium and vitamin D don’t fall with them, so eating smaller amounts means choosing food that carries more nutrients.
Do I need to hit my number every day?
No. These values describe averages over time, and your own energy use shifts from day to day. Eating more on a hiking day and less on a desk day is normal. If your appetite or weight changes without an obvious reason, see your doctor.
What about children and teenagers?
EFSA also publishes values by year of age, which climb quickly during growth. They’re meant for public health planning, not for portioning a child’s plate. Whether a child’s growth and appetite are on track is a question for their pediatrician or family doctor.
In short
There’s no single right number of calories for everyone: official ranges run from about 1,600 to 3,300 kcal a day for adults, and activity matters more than age. The 2,000 on the label is a yardstick, not a goal. First step: find your row in the EFSA table and read it as a range; for a personal figure, ask your doctor or a registered dietitian.
Sources
- U.S. Food and Drug Administration, “How to Understand and Use the Nutrition Facts Label”, updated 2024: fda.gov.
- U.S. Department of Health and Human Services and U.S. Department of Agriculture, Dietary Guidelines for Americans, 2025–2030, 2026: realfood.gov.
- NHS, “Understanding calories”, reviewed 2023: nhs.uk.
- EFSA Panel on Dietetic Products, Nutrition and Allergies, “Scientific Opinion on Dietary Reference Values for energy”, EFSA Journal, 11(1):3005, 2013: doi.org/10.2903/j.efsa.2013.3005.
- EFSA, Summary of Dietary Reference Values, version 4, September 2017, table 1: efsa.europa.eu.
- Anses, Actualisation des repères du PNNS : élaboration des références nutritionnelles, December 2016, section 3.4 and tables 2–3 (citing SACN, Dietary Reference Values for Energy, 2011): anses.fr.
- Regulation (EU) No 1169/2011 on the provision of food information to consumers, Annexes XIII and XIV (retained in UK law): legislation.gov.uk.
- Lorien E. Urban et al., “The accuracy of stated energy contents of reduced-energy, commercially prepared foods”, Journal of the American Dietetic Association, 110(1), 116–123, 2010: doi.org/10.1016/j.jada.2009.10.003.
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