A healthy body fat percentage depends mainly on your age and sex. As a general
guide, most men are healthy around 8 to 24 percent and most women around 21 to
35 percent, and the healthy range rises slightly as you get older. Athletes
often sit lower. The charts below break this down by age for men and women so
you can find your exact range.
Unlike weight or BMI, body fat percentage tells you how much of your body is
actually fat, and how much is muscle, bone and water. This article covers the
most commonly used body fat charts, what they mean, and how to use them.
Why body fat percentage matters
Two people can have identical BMIs but very different body compositions. A
30-year-old man who weighs 80 kg and does regular strength training might have
13% body fat. A sedentary 30-year-old man at the same weight might have 26%
body fat. Their BMIs would look identical on paper - but their health risks,
muscle mass, energy levels and performance could be completely different.
Body fat percentage cuts through this by measuring what is actually there. For
more on this comparison, read our article on
BMI vs body fat.
Body fat percentage categories - general reference
The most widely referenced category system in fitness was developed by the
American Council on Exercise (ACE). These categories apply broadly to adults,
though ranges can vary between sources.
| Category |
Women |
Men |
| Essential fat |
10–13% |
2–5% |
| Athletes |
14–20% |
6–13% |
| Fitness |
21–24% |
14–17% |
| Average |
25–31% |
18–24% |
| Obese |
32%+ |
25%+ |
Source: American Council on Exercise (ACE)
Women have higher essential fat requirements than men because of physiological
factors including reproductive hormones. Falling below essential fat levels
can cause serious health problems including hormonal disruption, bone density
loss and immune dysfunction.
Body fat percentage by age - men
Body fat tends to change with age even if weight stays the same, often because
muscle mass declines and activity levels change. The following ranges are
adapted from commonly used health and fitness guidelines:
| Age |
Underfat |
Healthy |
Overweight |
Obese |
| 20–39 |
Below 8% |
8–19% |
20–24% |
25%+ |
| 40–59 |
Below 11% |
11–21% |
22–27% |
28%+ |
| 60–79 |
Below 13% |
13–24% |
25–29% |
30%+ |
Body fat percentage by age - women
| Age |
Underfat |
Healthy |
Overweight |
Obese |
| 20–39 |
Below 21% |
21–32% |
33–38% |
39%+ |
| 40–59 |
Below 23% |
23–33% |
34–39% |
40%+ |
| 60–79 |
Below 24% |
24–35% |
36–41% |
42%+ |
These ranges are general reference guides based on commonly used health and
fitness standards. They are not medical diagnoses. Healthy body composition
is influenced by many individual factors beyond these numbers.
How is body fat percentage measured?
There are several methods, each with different levels of accuracy and
practicality:
-
DEXA scan (Dual-energy X-ray absorptiometry): The most
accurate method. Measures bone, lean mass and fat mass separately. Usually
requires a specialist clinic.
-
Hydrostatic weighing: Very accurate but uncommon. Requires
full submersion in water.
-
Skinfold calipers: A trained professional measures skinfold
thickness at multiple sites. Reasonably accurate if done correctly.
-
Bioelectrical impedance analysis (BIA): Used in many
consumer smart scales and gym devices. Convenient, but accuracy can be
affected by hydration, food intake and timing.
-
Circumference-based methods (e.g. Navy method): Uses
measurements of the waist, neck and hips to estimate body fat. Our
Body Fat Calculator uses the US Navy method - no
equipment needed beyond a tape measure.
For most people, the most important thing is consistency - using the same
method under similar conditions to track changes over time.
If you want a step-by-step home method, read how to calculate body fat at home without equipment.
What affects body fat percentage?
-
Age: Muscle mass tends to decline after around age 30
unless actively maintained through resistance training, which can cause body
fat percentage to rise even with no change in weight.
-
Sex: Women naturally carry more essential fat than men due
to hormonal and physiological differences.
-
Exercise type: Resistance training builds lean muscle,
which reduces body fat percentage even if weight stays the same.
-
Diet: A sustained calorie deficit reduces fat stores.
Protein intake influences how much muscle is preserved during fat loss. Read
how to lose body fat without losing muscle
for more.
-
Genetics: Fat distribution patterns are partially genetic.
-
Sleep and stress: Chronic poor sleep and high cortisol can
increase fat storage, particularly abdominal fat.
How to improve your body fat percentage
Body fat percentage improves when you reduce fat mass, increase lean mass, or
both. The most effective strategies:
-
Strength training: 2–4 sessions per week of resistance
training builds and preserves muscle.
-
Adequate protein: 1.6–2.2 g per kg of body weight helps
preserve and build lean mass. This matters most during fat loss phases.
-
Moderate calorie deficit: A deficit of 300–500 calories per
day minimises muscle loss while reducing fat. Use our
Calorie Calculator to estimate your target.
-
Cardio for additional calorie burn: Zone 2 cardio (around
60–70% of max heart rate) is effective and sustainable. See our article on
fat burning heart rate zones
.
-
Consistent tracking: Measure body fat every 3–4 weeks.
Tracking confirms whether your approach is working.
Frequently asked questions
What is a healthy body fat percentage?
It depends on age and sex. Most adult men fall in a healthy range around 8–24%
depending on age, and most adult women around 21–35%. See the charts above for
age-specific breakdowns.
What is a good body fat percentage for men?
For men, 14–17% is often considered a fitness range. 18–24% is generally
considered average or acceptable for many adults.
What is a good body fat percentage for women?
For women, 21–24% is often considered a fitness range. 25–31% is generally
considered average or acceptable for many adults.
Does body fat percentage increase with age?
It can. As muscle mass tends to decline with age and activity levels often
change, body fat percentage can rise even if total weight stays the same. This
is why it is useful to track body fat directly rather than just weight.
Is body fat percentage better than BMI?
For understanding body composition, yes. BMI uses height and weight and cannot
distinguish fat from muscle. Body fat percentage measures fat directly, making
it more useful for health and fitness goals.
Can body fat be too low?
Yes. Below essential fat levels (2–5% for men, 10–13% for women), health
problems can develop including hormonal disruption, reduced immunity and poor
recovery. Very low body fat is not a goal to aim for.
How often should I check body fat percentage?
Every 2–4 weeks is sufficient for most people. Daily measurements vary too
much due to hydration, food intake and measurement conditions to be useful for
tracking trends.
Your next step
Knowing your body fat percentage is the start. First, estimate yours with our
free Body Fat Calculator using just a tape
measure. Then, to turn the number into a plan, our free
Complete Health Report brings your body fat
estimate, calorie target and training zones together in one place, with a
downloadable PDF.
