Body Fat Calculator for Women (With Body Fat Chart by Age)

Your weight doesn’t tell you how much of it is fat and how much is muscle. Body fat percentage does. This free body fat calculator for women uses the U.S. Navy method: all you need is a soft tape measure and two minutes.

Measure your neck, waist and hips, enter your height, and add your weight if you’d like to see your fat and lean mass. For another view of belly fat, try the waist-to-hip ratio calculator.

See how much of your weight is lean mass with our lean body mass calculator.

Body Fat Calculator for Women

Estimate your body fat percentage with a tape measure, using the U.S. Navy method.

Please check your measurements. Waist plus hips must be larger than your neck.

The U.S. Navy method is usually within a few percentage points of lab methods like DEXA, but results depend on careful measuring. Measure in the morning, on bare skin, with the tape snug but not tight.

How to Measure for the Calculator

Use a soft, flexible tape measure on bare skin. Keep it snug but not tight, and level all the way around.

  1. Neck: just below your larynx (voice box), with the tape sloping slightly down toward the front.
  2. Waist: at the narrowest point of your torso, usually just above your belly button. Breathe out normally.
  3. Hips: at the widest part of your buttocks, with your feet together.
  4. Height: standing straight against a wall, without shoes.

Measure each one twice and use the average. Measuring at the same time of day (morning is best) makes it easier to track changes.

Body Fat Percentage Chart for Women

CategoryBody fat
Essential fat10 to 13%
Athletes14 to 20%
Fitness21 to 24%
Average25 to 31%
Above average32% or more

Source: American Council on Exercise (ACE). Women naturally carry more essential fat than men, for hormone and reproductive health.

Healthy Body Fat for Women by Age

Body fat naturally rises a little with age. A widely cited study suggested these healthy ranges for women:

AgeHealthy body fat range
20 to 3921 to 32%
40 to 5923 to 33%
60 to 7924 to 35%

Source: Gallagher et al., American Journal of Clinical Nutrition, 2000. See the full charts and check your range on our body fat percentage chart for women.

Why Body Fat Matters More Than Weight After 40

  • Muscle loss hides in the scale. Women lose muscle with age, so weight can stay the same while body fat rises.
  • Menopause moves fat to the waist. Belly fat is linked with higher risk of heart disease and type 2 diabetes. The calculator also shows your waist-to-hip ratio and waist size for this reason.
  • Strength training changes the picture. Building muscle can lower your body fat even if your weight doesn’t change much.

How Accurate Is the Navy Method?

The U.S. Navy method is a practical home estimate. Studies show it’s usually within a few percentage points of lab methods like DEXA scans, but small measuring mistakes can shift the result. Use it to track your own trend over time, not to compare yourself with others.

For a clinical measurement, ask your doctor about a DEXA scan, which also measures bone density, useful after menopause. See how to protect your bones after 40.

How to Lower Body Fat After 40

  1. Strength train 2 to 3 times a week to protect and build muscle.
  2. Eat enough protein. Use our protein calculator for women over 40.
  3. Create a small calorie deficit of 250 to 500 calories. Find your numbers with our calorie calculator for women.
  4. Walk every day. See how it adds up with our walking calorie calculator.
  5. Sleep 7 or more hours. Try our sleep calculator.

Frequently Asked Questions

What is a healthy body fat percentage for a woman over 40?

For women aged 40 to 59, about 23 to 33% is considered healthy. For women 60 to 79, about 24 to 35%.

What is the average body fat for women?

On the ACE chart, 25 to 31% is “average” for women.

Is a body fat calculator accurate?

Tape-measure methods are good estimates, usually within a few percentage points of lab tests. Measure carefully and use the same method each time.

Why is women’s body fat higher than men’s?

Women need more essential fat for hormone, reproductive and overall health.

Does this calculator save my information?

No. Nothing is saved or sent anywhere.

What is a good body fat percentage for a woman over 50?

About 23% to 33% for women 40 to 59, and about 24% to 35% for women 60 to 79. See the full chart on our body fat percentage chart for women.

Can I measure body fat without calipers?

Yes. This calculator only needs a soft tape measure: your waist, hips, neck and height.

Related Tools

This calculator is for general information only and is not medical advice. Read our Medical Disclaimer and Editorial Policy.

Sources

Health note: Content on this site is for general information only and is not medical advice. Always consult your doctor about health concerns.

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