How to Calculate Your Ideal Body Fat Percentage (2024)

by: E.C. LaMeaux

Many of us ask the question, "what body fat percentage am I?", but do any of us really know what body fat percentage is or how to calculate it? Body fat percentage is the percentage of your weight that is made up of fat. It consists of both storage body fat and essential body fat. There are several ways in calculating body fat percentage, including bioelectrical impedance analysis, skin-fold methods and other anthropometric methods, or methods involving the circumference of various body parts. Here's a method to calculate your body fat using only your scale and a calculator.

Step 1: Know the recommended/average body fat percentage ranges

First, you must consider variables such asbody type, heredity, age, activity and gender. For instance, the range for a healthy body fat percentage in women tends to be higher than that of men, as women need more body fat. A certain amount of fat is important for bodily functions. It regulates your body temperature, cushions organs and tissues, and is the main form of your body’s energy storage. So it's important to have neither too much nor too little body fat. If you'd like to try and reduce your body fat percentage, consider a new Yoga or Pilates class. Mayo Clinic staff, as well as other health professionals, list the following age-adjusted body fat percentile recommendations:

Women:

  • 20-40 yrs old: Underfat: under 21 percent, Healthy: 21-33 percent, Overweight: 33-39 percent, Obese: Over 39 percent
  • 41-60 yrs old: Underfat: under 23 percent, Healthy: 23-35 percent, Overweight : 35-40 percent Obese: over 40 percent
  • 61-79 yrs old: Underfat: under 24 percent, Healthy: 24-36 percent, Overweight: 36-42 percent, Obese: over 42 percent

Men:

  • 20-40 yrs old: Underfat: under 8 percent, Healthy: 8-19 percent, Overweight: 19-25 percent, Obese: over 25 percent
  • 41-60 yrs old: Underfat: under 11 percent, Healthy: 11-22 percent, Overweight: 22-27 percent, Obese: over 27 percent
  • 61-79 yrs old: Underfat: under 13 percent, Healthy: 13-25 percent, Overweight: 25-30 percent, Obese: over 30 percent

Step 2: Weigh yourself

Obtain as accurate a body weight as possible. Different scales often give different numbers, and depending on the time of day you weigh yourself, your numbers may vary. Try weighing yourself on the samescale at approximately the same time of day over a few days to get an average of your body weight.

Step 3: Calculate your body mass index (BMI)

You can easily calculate yourBMI by dividing your weight in pounds by your height in inches squared, and then multiplying by a conversion factor of 703. Using the example of a 150-pound person who is five feet five inches (or 65 inches), the calculation would look like this: [150 ÷ (65)²] x 703 = 24.96

Step 4: Calculating body fat percentage

According to a study published in theBritish Journal of Nutrition in 1991, if you are an adult, your percentage of body fat can be estimated as accurately as with skin-fold measurements and bioelectrical tests using the following gender-based formulas in conjunction with your BMI. This calculation has been shown to slightly overestimate body fat percentage in people who are very overweight. Take your BMI result from Step 3 and plug it into the appropriate formula below to calculate your body fat percentage.

Women:

  • (1.20 x BMI) + (0.23 x Age) - 5.4 = Body Fat Percentage

Men:

  • (1.20 x BMI) + (0.23 x Age) - 16.2 = Body Fat Percentage

Step 5: Compare your body fat percentage to the percentiles listed in Step 1

After learning how to calculate average body fat percentage, take a moment to compare the result you got in Step 4 to the body fat percentiles in Step 1. Comparing your results with these numbers should give you a good indication of how close or how far you may be from your ideal body fat percentage.

If your BMI or body fat percentage is higher than what you want it to be, a slight change in your lifestyle or workout routine can make a big difference, and having the right equipment enhances the effects to help you achieve the body you want.

How to Calculate Your Ideal Body Fat Percentage (2024)

FAQs

How to Calculate Your Ideal Body Fat Percentage? ›

The formula uses a person's body mass index (BMI) to estimate their body fat percentage. For men, the formula is (1.20 x BMI) + (0.23 x Age) – 16.2, while for women, it is (1.20 x BMI) + (0.23 x Age) – 5.4. BMI is calculated by dividing a person's weight in kilograms by their height in meters squared.

How to calculate ideal body fat percentage? ›

The formula uses a person's body mass index (BMI) to estimate their body fat percentage. For men, the formula is (1.20 x BMI) + (0.23 x Age) – 16.2, while for women, it is (1.20 x BMI) + (0.23 x Age) – 5.4. BMI is calculated by dividing a person's weight in kilograms by their height in meters squared.

How do you calculate exact body fat percentage? ›

The 10 Best Ways to Measure Your Body Fat Percentage
  1. Skinfold Calipers. ...
  2. Body Circumference Measurements. ...
  3. Dual-Energy X-ray Absorptiometry (DXA) ...
  4. Hydrostatic Weighing. ...
  5. Air Displacement Plethysmography (Bod Pod) ...
  6. Bioelectrical Impedance Analysis (BIA) ...
  7. Bioimpedance Spectroscopy (BIS) ...
  8. Electrical Impedance Myography (EIM)
May 18, 2023

What is the formula for body fat percentage? ›

The body fat percentage (BFP) of a human or other living being is the total mass of fat divided by total body mass, multiplied by 100; body fat includes essential body fat and storage body fat.

How do you calculate the percentage of fat in your body? ›

What's the best way to measure body fat?
  1. Weight. ...
  2. Body Mass Index (BMI) ...
  3. Waist circumference. ...
  4. Waist: hip ratio. ...
  5. Weight to height ratio - the “string challenge” ...
  6. Skinfold measurements – callipers or “the pinch test” ...
  7. Bio impedance – “smart scales” ...
  8. Hydrostatic weighing (underwater weighing)

What is the most accurate body fat calculation? ›

Hydrostatic (or underwater) weighing

To measure your weight in water, you will be seated undressed on a chair that is halfway submerged in water. According to the American College of Sports Medicine (ACSM), this is the gold standard for calculating body fat because of its high accuracy.

What is the ideal fat percentage chart? ›

What should your body fat percentage be?
Age (years)Healthy body fat percentage (men)Healthy body fat percentage (women)
20 to 398 to 19 percent21 to 32 percent
40 to 5911 to 21 percent23 to 33 percent
60 to 7913 to 24 percent24 to 35 percent

Are body fat calculators accurate? ›

Are they accurate? Body fat scales provide a rough estimate of a person's BFP. However, they are not very accurate. A 2016 study found that the BIA method of measuring body composition is accurate when using standard, published mathematical formulas.

How do you calculate body fat at weight? ›

Body Fat Calculator

For women, the formula begins with a simple weight calculation: (Total bodyweight x 0.732) + 8.987.

What is the most attractive body fat percentage? ›

Attractiveness by body fat followed a bell-shaped curve: 12% body fat is optimum. If you exceed this value, you become less attractive as your body fat percentage increases. Less body fat than 12%, however, also reduces attractiveness.

What does 22% body fat look like? ›

As far as female body fat percentage, 20-22% body fat will be an athletic look with visible lean muscle mass, a smaller waist size and minimal belly fat. Your abs muscle may be visible and you may be able to see muscle separation in some areas.

What does 15% bodyfat look like? ›

Hint it is NOT this: 15 percent body fat is considered to be a relatively low percentage for both men and women . At this level , you can expect to see defined muscle definition and a lean appearance . For men , this may look like a visible six - pack and well - defined chest , shoulders , and arms .

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