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Formulas

Below are the links for various calorie formulas

Harris-Benedict Formula for maintaining bodyweight

Other bodyweight maintenance formula (including downloadable excel document)

To Lose Weight (cutting phase)

To Gain Weight (bulking phase)

Harris-Benedict Formula for maintaining bodyweight (2 steps):

This will determine how many calories you should consume per day. Step 1 determines your BMR (basal metabolic rate - your caloric needs to survive, essentially, to keep your body from going into "starvation mode" - one of the many reasons why simply not eating is a very unhealthy way to lose weight)

Step 1 is to find your BMR:

For Men:
BMR = 66 + (13.7 X weight in kilos) + (5 X height in cm) - (6.8 X age in years)


For Women:
BMR = 655 + (9.6 X weight in kilos) + (1.8 X height in cm) - (4.7 X age in years).

(Note: 1 inch = 2.54 cm; 1 kilogram = 2.2 lbs.)

Step 2 is to determine your daily caloric needs
To determine your total daily calorie needs, now multiply your BMR by the appropriate activity factor, as follows:

Activity Level Formula for Step 2
If you are Sedentary - little or no exercise BMR X 1.2
If you are Lightly Active (light exercise/sports 1-3 days/week) BMR X 1.375
If you are Moderately Active (moderate exercise/sports 3-5 days/week) BMR X 1.55
If you are Very Active (hard exercise/sports 6-7 days/week) BMR X 1.725
If you are Extra Active (very hard daily exercise/sports & physical job or 2X day training) BMR X 1.9

Example:
Step 1: Finding your BMR
You are 32 years old
You are 5 feet 4 inches tall (162.5 cm)
Your weight is 185 pounds (84 kilos)
Your BMR is 655 + (806) + (291) - (150) = 1602 calories
Step 2: Finding your caloric needs
If you are sedentary, multiply your BMR (1602) by 1.2 = 1922
Your total daily calorie requirement is therefore 1922 calories.
This is the total number of calories you need in order to MAINTAIN your current weight.

Other Formula for Maintaining your bodyweight:

This will determine how many calories you should consume per day.

men 66.5 + (13.8 x weight in kg) + (5.0 x height in cm) — (6.8 x age)
women 655.1 + (9.6 x weight) + (1.9 x height) — (4.7 x age)

the above formulas are for completely sedentary people
if you drive, do office work, etc. multiple the above by 1.3
if you do light labor (laundry, housework, clean garage) multiply by 1.6
if you do heavy labor or are into sports, multiply by 2.0

click here to download a free interactive excel spreadsheet to plug in numbers

To Lose Weight (cutting phases):

Download interactive excel document for weight loss formula
(includes macronutrients breakdown)

Before you read the next sentence, promise to read the proceeding sentence. Lose One Pound of Body Weight by Reducing Calorie Intake by 3500 Calories. This means that you can cut calories out of your diet and exercise to lose those calories. A combination of the two will ensure you are cutting fat and not muscle. Remember, it is possible to lose weight but be retain just as much fat as you had before! And also remember:

Lose between 1 and 2 pounds of weight, Maximum, per week! Any more and you're losing lean muscle muscle and water. That means that you need to cut and burn 7,000 calories per week.

As a general rule, to lose weight (cut) you should cut 500 calories from your current daily intake. This is assuming, of course, you are not currently eating in starvation mode. If you are not consuming enough food (per the maintenance schedule discussed above, then you actually need to slowly increase your caloric intake to lose weight. Strange but true!

One last word from me: a great way to add to the caloric deficit is to incorporate High-Intensity Interval Training (HIIT) which you can learn about by clicking here.

On a final note: The American College of Sports Medicine (ACSM) recommends that calorie levels never drop below 1200 calories per day for women or 1800 per day for men. Even these calorie levels are quite low.

To Gain Weight (bulking phases):

First, establish your maintenance level by using one of the formulas above. Once you have done this, it is easy to learn how to gain weight: simply increase your calorie-intake above your weight maintenance level. As a general rule, eating an extra 500 calories per day will cause you to gain one pound a week.

Eat sensibly, exercise regularly to gain lean body weight, not fat. Exercising regularly will ensure you are building muscle! Of course, with every bulking phase, you will gain a little fat, so don't get discouraged.

 

Tailored for Brothers & Sisters in Health & Fitness
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