Calorie Intake Calculator

What Calorie Intake is for

Calorie Intake Calculator is the page to open when you need calorie intake from measurements you already have. It belongs with the other health calculators because that is the work this arithmetic supports. The body size behind this intake is the body mass index. Type the entries first. The result stays hidden until you press Calculate, so a half-finished form never flashes a number you might mistake for the answer.

How to fill in this calculator

1. Age. Enter the value this part of the job needs.
2. Gender. Enter the value this part of the job needs. The choices include male, female.
3. Height. Enter the value this part of the job needs. The unit list on this field includes in, cm.
4. Weight. Enter the value this part of the job needs. The unit list on this field includes lb, kg, st.
5. Activity Level. Enter the value this part of the job needs. The choices include little to no exercise, light exercise 1-3 times per week, moderate exercise 3-5 times per week, heavy physical exercise 5-6 times per week, heavy physical exercise 6-7 times per week.
6. Nutrition Goal. Enter the value this part of the job needs. The choices include maintain current weight, mild weight loss, goal: ½ lb (¼ kg) per week, moderate weight loss, goal: 1 lb (½ kg) per week, heavy weight loss, goal: 2 lb (1 kg) per week, build muscle or gain weight.
7. BMR Formula. Enter the value this part of the job needs. The choices include Mifflin St Jeor, Katch-McArdle, Revised Harris-Benedict, Harris-Benedict, Schofield.
8. Body Fat Percentage. Enter the value this part of the job needs.

The formula in plain language

BMI is 703 times weight in pounds, divided by height in inches squared. The same figure in metric units is kilograms divided by meters squared. A body-fat estimate from BMI, age, and sex is the Deurenberg equation, which is a screening number, not a lab test. Calorie needs start from a basal rate. The Mifflin-St Jeor equation is 10 times kilograms, plus 6.25 times centimeters, minus 5 times age, plus 5 for men or minus 161 for women. Multiply by an activity factor from 1.2 for a desk job to about 1.9 for daily hard training. A half-pound change a week is about 250 calories a day.

A worked example

A person who is 5 feet 10 inches and 160 pounds has a BMI of 23.0, in the healthy-weight band. A 35-year-old man at that size has a Mifflin-St Jeor BMR near 1,660 calories. With moderate training the maintenance estimate is about 2,570 calories.

Calories, protein, and the maintenance line are one day's intake. After this calorie intake result, check macronutrients and carbohydrate intake.

Mistakes that move the answer

• These numbers do not diagnose anything. A clinician uses more than a calculator.
• Katch-McArdle needs a body-fat percent because it starts from lean mass. Leaving that field empty makes the formula incomplete.
• Activity is what you do on a typical week, not the week you started a new program.

How to check the result

After Calculate shows the calorie intake result, redo the last operation with a pencil using the rounded figures on the screen. Matching that check means the inputs were read correctly. If you edit a label or a sentence in this HTML file, reload the page. The form and this article both live in the file, so the edit is what visitors will read.