How Many Calories Do You Need? The Harris Benedict Equation

The Harris Benedict equation formula was developed in 1919 and derived from 239 normal, healthy people of all ages. A follow-up study was carried out in 1984 to improve the accuracy of the equation, and we can estimate the energy expenditure (and thus the calorie needs) of a normal healthy individual to be about 10%.

This is very accurate for a fairly simple formula, and even without medically trained staff, you can know exactly how much to eat to get the results you want.

Head over to the bottom of this post to automatically calculate calories from the Harris benedict calculator or check out the details directly below.

The method is as follows.

Step 1

Calculate your basal metabolic rate (BMR). This is the number of calories you need to maintain your weight if you do nothing for the rest of the day. Men’s:

BMR = 66.47 + (13.75 x body weight kg) + (5.003 x height cm) – (6.755 x age)

For women:

BMR = 655.1 + (9.563 x weight kg) + (1.850 x height in cm) – (4.676 x age)

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Step 2

According to harris benedict equation, multiply the number you get from above and multiply by your exercise level below. If you go insane, you should use the ‘moderately active’ or ‘very active’ multipliers.

Step 3

Now you have your weight maintenance number. You should adjust this number up or down depending on whether you want to gain or lose weight. Simply remove or add the number of calories below. Find out how many calories you need in a day!

The Harris Benedict Calculator

Need There is Harris benedict calculator available on the web which you can use and make sure to add your goal as per weight loss, gain, or maintenance calories.