Calorie needs at age 19, male
Daily calorie needs depend on age, sex, size and how much you move. Here is the sum for a 19-year-old man who is 5 ft 10 in and 178 lb.
How it works
Daily calories equal resting calories times an activity factor. Resting calories come from Mifflin-St Jeor: 10 times kilograms plus 6.25 times centimeters minus 5 times age, with 5 added for males or 161 taken off for females. The factor runs from 1.2 to 1.9. This 19-year-old man uses a factor of 1.375 for the lightly active level.
Worked example
Say a man aged 19 is 5 ft 10 in tall and weighs 178 lb. That is 177.8 cm and 80.74 kg. The weight term is 10 × 80.74 = 807.4. The height term is 6.25 × 177.8 = 1111.25. The age term is 5 × 19 = 95. Add 5. The result is 1828.65 at rest. Times 1.375 for the lightly active level is 2514.4, which rounds to 2514 calories a day.
Maintenance calories at every activity level for the same man aged 19 at 5 ft 10 in and 178 lb, with the lightly active level set in the form above.
- Sedentary (little or no exercise)
- 2194 calories a day
- Lightly active (light exercise 1 to 3 days a week)
- 2514 calories a day
- Moderately active (moderate exercise 3 to 5 days a week)
- 2834 calories a day
- Very active (hard exercise 6 to 7 days a week)
- 3154 calories a day
- Extra active (very hard exercise and a physical job)
- 3474 calories a day
Common questions
What is the difference between BMR and TDEE?
BMR is what your body burns at rest. TDEE adds the calories you use moving and exercising. It is always higher. For this man aged 19 at 178 lb, BMR is 1829 calories and TDEE at the lightly active level is 2514.
Which activity level should I pick?
Pick the one that matches a typical week, not your best week. If you sit most of the day and train a few times, lightly or moderately active is usually closer than very active. Across the five levels this 19-year-old man ranges from 2194 to 3474 calories a day, and the lightly active level gives 2514.
How big a calorie deficit is reasonable for weight loss?
A deficit of 500 calories a day is a common starting point and works out to roughly half a kilogram a week. Smaller deficits are slower and easier to keep up. A 500 calorie deficit here means 2014 calories a day for this 19-year-old man at the lightly active level.
How big a surplus helps build muscle?
A modest surplus of about 250 calories a day is a common starting point. Larger surpluses tend to add more fat without adding muscle faster. A 250 calorie surplus here means 2764 calories a day for this 19-year-old man at the lightly active level.
Why does age 19 change the result?
The formula takes 5 calories off for every year of age, which reflects that resting burn tends to fall over time. At 19 that is 95 calories. Without the age term this 19-year-old man would burn 1924 calories at rest, or 2645 a day at the lightly active level.