How Many Calories Should a Man Eat a Day?

How many calories should a man eat a day? About 2,500 kcal on average, and individual needs run from roughly 2,200 to 3,500 kcal depending on age and activity. Your own number follows your height, weight, age and how much you move. The figures come from the NHS and from the 2023 National Academies tables for US men.

How many calories does the average man need?

About 2,500 kcal a day. That’s the NHS guide for men, and it adds that the real figure depends on age, weight, height and exercise (NHS). In kilojoules, which is how Australian labels show it, 2,500 kcal is 10,460 kJ, since 1 kcal is 4.184 kJ. Men and women side by side are in how many calories per day you need.

The National Academies are more specific. They took the median height and weight of adult men in national surveys and ran their equations for four activity levels.

Activity level	US men, 19 and over (175.4 cm, 87.2 kg)	Canadian men, 19 and over (175.9 cm, 83.2 kg)
Inactive	2,581 kcal	2,528 kcal
Low active	2,799 kcal	2,743 kcal
Active	2,994 kcal	2,934 kcal
Very active	3,345 kcal	3,276 kcal

Even the inactive row sits slightly above the NHS guide, because the median man in these surveys weighs 87 kg. Inactive means daily living only. Very active adds more than two hours of vigorous exercise.

What is the average TDEE for men and women?

For men it runs from 2,581 to 3,345 kcal in the table above, and for women from 2,014 to 2,543 kcal in the same source. TDEE, or total daily energy expenditure, is the calories you burn in a day. The National Academies’ pooled sample of adults, about two-thirds of them women, averages 2,437 kcal a day with a standard deviation of 592 kcal. What adults report eating against that burn is the subject of average calories per day.

Activity level	Median US man	Median US woman	Gap
Inactive	2,581 kcal	2,014 kcal	567 kcal
Low active	2,799 kcal	2,178 kcal	621 kcal
Active	2,994 kcal	2,317 kcal	677 kcal
Very active	3,345 kcal	2,543 kcal	802 kcal

Body size accounts for only part of the gap. The median man is 14.2 cm taller and 14.0 kg heavier than the median woman. I also ran two people of identical age, height and weight through the NASEM equations: 40 years, 170 cm, 70 kg, low active. They came out at 2,605 kcal against 2,267 kcal. A gap of 338 kcal remains, a bit over half of the 621 kcal between the medians.

NASEM’s review of resting energy finds that sex has little effect once body mass and composition are controlled. Its two TDEE equations still carry separate terms for each sex, and that is where the remaining 338 kcal comes from.

How many calories should a man eat a day by age?

Needs start falling after 30. The next table gives the National Academies’ figures for US men, using the median height and weight of each age group.

Age group, NASEM Table 7-9	Median height and weight	Inactive	Low active	Active	Very active
19–30	176.1 cm, 81.4 kg	2,775 kcal	2,988 kcal	3,177 kcal	3,516 kcal
31–50	176.3 cm, 89.9 kg	2,733 kcal	2,955 kcal	3,151 kcal	3,519 kcal
51–70	174.9 cm, 88.7 kg	2,491 kcal	2,709 kcal	2,907 kcal	3,258 kcal
Over 70	172.2 cm, 83.3 kg	2,181 kcal	2,389 kcal	2,586 kcal	2,896 kcal

The equation takes off about 108 kcal for every 10 years. That’s why the rows slide down even though the 31 to 50 group is the heaviest. As for 3,000 kcal, it is close to the low active figure for ages 19 to 30 (2,988 kcal). For ages 31 to 50 it sits between low active (2,955 kcal) and active (3,151 kcal).

How many calories should a man eat to lose weight?

Take your estimated needs and subtract a modest deficit. Stay at or above 1,500 kcal. The AHA/ACC/TOS guideline lists 1,500–1,800 kcal a day as typical for men, or a deficit of 500 or 750 kcal from needs, and TDEE for weight loss works that sum through. The NHS suggests aiming for 0.5 to 1 kg (1 to 2 lb) a week.

Older and smaller men run into the floor first. For a man, 1,500 is the lowest usual step rather than a starting point, and 1500 calories a day says who it fits. A man over 70 who is inactive needs 2,181 kcal, so a 500 kcal deficit leaves 1,681 kcal. That is fine. A 750 kcal deficit would leave 1,431 kcal, under the floor. His largest usable deficit is 681 kcal.

These deficits assume a BMI above the usual range of 18.5 to 24.9. BMI can’t tell muscle from fat. A man who lifts can sit above that range with little fat to lose. The NHS points to waist size as another check, and a doctor can help you read both. Medical conditions and medicines change energy needs, and a doctor sets those targets, not a table.

How do I find my own number?

Start with the equation, then check it on the scale. The calorie calculator takes your age, height, weight and activity and applies those same NASEM 2023 equations. A target under the 1,200 or 1,500 calorie floors is off the table.

Eat that number for two weeks and weigh yourself most mornings. I look at the average of the week, never one day, because single weigh-ins swing too much. If it holds, you’ve found your level. If it creeps in either direction, nudge your intake and run another two weeks.

If counting calories has started to feel hard to stop, or eating feels out of control, talk to someone: ANAD in the US (1-888-375-7767), Beat in England (0808 801 0677), NEDIC in Canada (1-866-633-4220) or the Butterfly Foundation in Australia (1800 33 4673). If you’re in danger right now, call your local emergency number. Other UK numbers and crisis lines are on our crisis support page.

Every table here is built on a median man, and you may not resemble him. NASEM’s adult equation for men is typically off by 339 kcal a day (root mean squared error), so the scale gets the last word.