Everything You Need to Know About Body Fat Percentage

What the #$%@ is body fat percentage?

What’s a good amount of body fat to aim for?

How the heck do I figure it out how muchI have?

Body fat is an incredibly tricky subject – it’s tough to calculate, tough to track, and most people are way off in their estimates of what they think their body fat percentage is.

As Kanye West once famously declared, “that right there could drive a sane man berserk.”

Luckily, you’re reading Nerd Fitness, which means you’re smart, funny, good looking AND modest. You also understand that this is one of those things that you should probably know something about.

And since we’re talking about kind of a dry, scientific subject here, you’ll be rewarded with cute animal videos at the end of each section so you don’t fall asleep on me.  

Fair warning: lots of half-naked people of all different levels of body fat in this article!

What is body fat percentage?

body fat tape measure

In its simplest form: body fat is the amount of fat in your body, compared to everything else.  Everything else includes your organs, muscles, bones, tendons, water, and so on.

Both men and women carry different amounts of body fat percentage due to…you know…being different.

A super ripped male body builder who is minimizing body fat percentage could have a percentage down as low as 3-4%, while a super ripped female body builder who is minimizing body fat percentage would only get as low as 8-9%.  A male athlete could be in fantastic shape and have 10% body fat, while a women at comparable  level of athleticism and appearance might be at 18-20% body fat.    To take the comparison to the other end of the spectrum, an overweight male at 30% will look vastly different than an overweight woman at 30%.

Feel free to take a break with this video of a lion cub hanging out with a puppy and a rabbit.

What’s a good amount of body fat to have?

Here is the generally accepted chart for women and men when it comes to body fat percentage:



Essential fat













32% plus

26% plus

In what I’m sure is news to nobody, body fat is essential to survival – fat protects your internal organs, provides you with necessary energy stores in times of peril, and more.

“Essential fat” means the minimal amount of fat required for survival – Anything less than this amount would mostly likely result in organ failure, but even approaching this amount of body fat is dangerous.  It’s for this reason that bodybuilders, who can minimize their body fat to the “essential fat” level only do so when prepping for a show – during the rest of the year they maintain a higher body fat percentage so that they can stay healthy and function properly.

If you are looking to have that “ripped” look (dudes) and “toned” look (ugh we hate that word), you’ll want your body fat percentage to hover in the “athletes” section.

If you’re looking to look healthy, I’d argue that you’ll want to be in the fitness range.  Once you get into the upper ends of “acceptable” and “obese,” a decrease in body fat percentage would benefit your health.

So, determining what’s an optimal goal for you:

  • If you are trying to look like Ryan Reynolds or Jessica Beil in Blade III, good luck! Aim for a body fat percentage of 6-8% (men) or 13-15% (women).  Note: your athletic/strength gaining performance will most likely suffer at this percentage, and might not be worth it. Your call.
  • If you are interested in getting that coveted six pack, drop your body fat down to the 8-11% range for dudes and 15-17% range for women.
  • If you are an athlete and interested in optimal athletic performance, aim for a body fat percentage around 15% (men) or 20% (women).  NF team member Staci trains much better at 20% body fat than at 15% body fat.
  • If you are just interested in looking pretty good and feeling pretty good, anything less than 18% for men and anywhere in the 20-23% range for women should get you the “hey, lookin pretty good!” response from your friends :)
  • For the ladies!  If you are concerned about menstruation or fertility, it has been said not to drop below 15% body fat.  Although I can’t find any studies that definitively refutes or proves this, it’s just something I wanted to point out so you can be aware.  Your results may vary!
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What do these amounts look like?

Below, you’ll see images of what people look like with different amounts of body fat.


Male Body Fat Pictures and Percentages 3-10%

Male Body Fat Pictures and Percentages 15-30%



Female Body Fat Percentages 11-18%

Female Body Fat Percentages 20-35%

A quick note:  your body fat percentage is just the amount of body fat  you have; it has nothing to do with the amount of muscle mass you have, which means you can have two people with the same amount of body fat percentage that look WAY different from each other.  Scroll down around halfway on this article for two great examples.

Are you surprised about what you thought and what the actual percentages look like? For a chuckle, look at THESE people who have ‘self-estimated’ their own body fat percentage!  Click through the different images and compare the percentages of the people above to the people in the link.  It’s clear they didn’t actually get measured, as most of them aren’t even CLOSE.

How do you calculate your body fat percentage?

tape measure and body fat caliper

The question I get asked above ALLLLLL others.  

There are seven main methods that you can use, each with varying levels of accuracy and cost: 

1) Take a Look – This might be my favorite method, although it requires a trained eye and isn’t exact.  By having an accurate list of pictures and comparing a picture of yourself, you can determine somewhat closely what your body fat percentage is.  This is a great article I’ve found for accurate portrayal of body fat percentage.  Make sure to note the difference in the two men, both at 10% body fat further down the page.

2) Body Fat Calipers – Pick up a set of calipers for $5. Pull the fat away from your muscles, pinch them with the caliper, take the measurements, and look at a chart  to figure out your body fat percentage.  Some recommend using one test site, some multiple.  In my experience, I have found that these calipers tend to underestimate body fat percentage (mine tell me that i’m 9 or 10% when I’m really 12%, and Staci’s say she’s 17% when she’s more like 20%), but are surprisingly accurate considering how cheap they are. Check out more information on caliper use.

3) The measurement method – By taking measurements (like the US Navy measurement or the YMCA measurement), you can calculate your body fat percentage.  I have found, as have others, that this method isn’t incredibly accurate as it can very easily overestimate your body fat.  Considering it only takes a few points of data, this is not surprising.

4) Body fat scales and monitors  – An electrical current is sent through your body and uses “biometrical impedance analysis.”  I don’t really like this method, as I find the number that it spits out to be horribly inaccurate; because they send an electrical current through your body, the amount of water you are carrying can drastically adjust this number.

5) The Bod Pod – The method calculates your body fat percentage by using air displacement to measure your body mass, volume, and density.  This is also pretty darn accurate, but also pretty darn expensive at usually around $75 per session.  Find a bod pod location by putting in your location in the right hand column.

6) Water displacement – Although very accurate (within 1-3% percent), it’s expensive, tedious, and a huge pain in the butt.  If anybody has any experience with a water displacement test, please share your story in the comments.

7) DEXA Scanning– This is considered the most accurate method, as it actually takes a full dual X-ray of your body composition and gives you numbers.   You can get this done at a health facility, and involves you lying on an X-Ray table for about 10 minutes.  It’s typically expensive, anywhere from $50-150 per session depending on where you are located.

VERY IMPORTANT: If you are going to start testing your body fat percentage, do whatever you can to test yourself under the same conditions each and every time.   For example: every Monday morning, on an empty stomach, while drinking a single glass of water.  This way, even if you’re not getting the correct body fat percentage (due to user error), you’ll at least get a consistent incorrect body fat percentage and can calculate how much you lost or if you are progressing in the right way.

“Steve, just tell me the best method!”

If you have the money, and you have a Bod Pod center close to you, then I’d say this would be the best combination of practicality and accuracy.  If you don’t have the money, then I would go with a simple body fat caliper, along with the “take a look” method.  Take a photo of yourself each week and compare the photos to the photos in the article above.

Here’s the thing with body fat percentage: although it’s fun to know and fun to see it getting lower as you get leaner, methods to track it can often be inaccurate. Take multiple tests with your preferred methods and understand that even then it might be off by 1-3% in either direction.

It comes down to this: Look in the mirror: do you like how you look? Awesome.   Do you NOT like what you see?  Follow the advice in the next section.

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What’s the best way to lower body fat percentage?

Alrighty! Let’s say you’re interested in dropping your body fat percentage, like my boy Saint here (whose FULL story you can read).

Here’s the best methods that I’ve found to get down to very low body fat percentages.  Note: these are JUST suggestions, your results may vary!  If you only want to drop a few percentage points, you can start with the advice at the top, and work your way down towards the bottom as you get lower and lower – the closer you get to single digits (dudes) or low double digits (ladies), the more strict you need to be with your diet and training.

Eat a caloric deficit – Although I believe there is more to it than just this, in order to lose weight, you need to be eating a caloric deficit – burning more calories than you consume.  If you are not strength training and still consuming lots of carbohydrates, you will most likely be losing muscle along with fat, which is not optimal but will help you lose body fat.

Lift heavy things – When you strength train with heavy objects (or with intense body weight training), you get stronger and keep the muscle mass that you already have.  On top of that, you also push your metabolism into an “afterburner” effect which burns extra calories even after you are done working out.

SprintsWhen you run sprints, you create a similar afterburner effect with strength training, meaning extra calories burned after the completion of your workout.

Eat less than 100 grams of carbohydrates per day – When you deprive your body of carbohydrates, it no longer has steady access to its preferred source of energy, sugar (which all carbs become once they’re consumed and processed by your body). It now has to pull from fat storage to fuel itself.

Follow the Paleo Diet – I am biased here, but this is the diet that I follow whenever I need to drop weight.  I recently dropped from 13-14% down to 10-11% in back in March for a vacation.  I had only followed this plan for three weeks (heavy strength training, Paleo Diet, and working out in a fasted state).  As you get very low, I would recommend cutting on almost all fruit and nuts and focusing on just consuming protein and vegetables.

Work out in a fasted state – Although advanced techniques to get to super low body fat percentages are beyond the scope of this article, here’s another tactic if you want to drop the last few percentage points: strength train in a fasted state, and don’t consume your first meal of the day until AFTER your workout.  This is a technique used by LeanGains and guys like Vic Magary and Anthony Mychal.  I’ve been training in a fasted state with zero issues on energy.

How is Body Fat Percent different from Body Mass Index?

weight scale
When you go to a doctor, they will most likely calculate your Body Mass Index (BMI).

Body Mass Index looks at your height and your weigh; based off this ratio, it tells you whether you are underweight, normal, overweight, or obese.

Seems pretty straight forward right?  Obviously, as your weight increases disproportionately compared to your height, you are more likely to be overweight.  Notice I just said “more likely.”

Here’s why: Your BMI isn’t directly correlated to your body fat percentage – it only factors in your height and weight.  It will give you the same reading if you’re made of 180 pounds of pure muscle, or 180 pounds of pure Cheetos.

For example, if I was six feet tall and 185 pounds witha body fat percentage of 10%, I would be put in the same “overweight” category as a guy who was six feet tall, 185 pounds, and a body fat percentage of 25%.  If two women have the same amount of body fat, and one tends to carry more water weight or have bigger bones than the other, one woman could be considered “overweight” while the other might be “average.”

For example: Lebron James is considered borderline obese when measured on the BMI scale, at a height of 6’8″ and 250 pounds.

That being said, I do believe BMI can be helpful – if you are above 30% body fat, then both your BMI and your body fat percentage would tell you that weight loss should be your primary goal.  HOWEVER, as soon as you start to get serious about your body weight and training, then BMI quickly loses its appeal.

Feel free to take note take note of your BMI, and then move onto the important stuff.

You’ve unlocked the final reward: “jack russell terrier and her adopted children, a piglet and a baby leopard” video. 

What other questions do you have?

bunny rabbit on scale
And that concludes today’s lesson on body fat percentage, friend!

I do most of my work in coffee shops these days, so I hope you understand the amount of work and ridiculous number of embarrassing Google searches that had to happen in order to bring this post together.  I just hope I don’t need to search for “chubby man in underwear” again any time soon!

Now, I know this is one of those super complicated topics, so I’d love to help answer any OTHER questions you have!  Just leave a comment and I’ll do my best to help out!



photo sources: tape measure and caliper, tape measure, weight scale, bunny in scale

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  • Ace

    OMG I really appreciate this post! I tried everything I could before, but when I stumbled upon this post, it truly helped more than the normal advertised techniques…

    You’ve truly given me hope friend! Thank you!

  • farrah

    Thank you so much for this useful article. I am struggling with my weight/fat loss now. I am a female, 33, 5’2”. I started fitness workout about three months ago. I started with 117 lbs and I am 128 lbs now. I am a vegetarian. I’ve cut almost all types of processed/junk/fast food and only eat healthy types of fat and carb. And the only source of sugar i use is fruits. No sweets. Sure I’ve built a lot of muscles, I can feel it and see it, but I also look a little big bigger and heavier which I hate. And the two times they measured my bodyfat at the gym, it came out the same (21%), no drops. What do I do? I am highly disappointed. Help please :-(

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  • sheilzasmith

    Measure your weight by using BMI. This is the best method to measure weight. Very simply your BMI is calculated by taking weight (in pounds or kilograms) and dividing it by height (in feet and inches or metres) squared.

  • Bally Chagger

    A month ago I weighed about 67kg and now I weigh now 64.1kg, my bmi is 24.99, height is 5.3 inches, I’m don’t know what is my body fat percentages I don’t have tools to do it at all.

    Can you work out what my body fat percentage is?

  • Bally Chagger

    I lost 3 Kia in 1 month and I have no ideas what my bfp is?
    Last month I weighed 67kg and was obese, this month now I’m 64.1kg and have no ideas what my body fat percentage is also, how I lost weight is doing extreme long walk which burns colorise, I first do 2 hours walk but this ti,e I walked 5.7km.
    It’s really 45 minutes of walk and burnt 350 kcal by walking, exercise and stretching its now left me some flabby skin which I’m trying to get rid of by burning fat around stomach and stretching.

  • Bally Chagger

    Sorry about my writing I mean 3 kilos in 4 weeks

  • nikole

    I liked this article ! Thorough and lots of humor. “180 pounds of pure cheetos” lol. I laughed at quite a few things in this article. Good read thanks !

  • Brittany

    I am almost underweight (5’7″ 117 lbs) but my body fat percentage is 25%. I would like to lower it to more like 18-20%. Look good in a swimsuit but like I still enjoy a cheeseburger now and then. My issue is how do I lose body fat without losing any weight.

  • Eric Whinnery

    Gotta say, awesome article. Very easy to read and fun, all while being informative. I’ve currently been doing Insanity for around the 60 day mark now, and the calorie deficit thing is finally starting to click with me. I’ve lost 18 lbs this year, and I couldn’t agree more with what you said. I’m considering researching paleo and giving it a shot!

  • hsekhon

    Thanks for sharing this Steve!

    Can you please clarify the bit on fasted state training. Does this only apply to strength training? I came across info during my research on “best time to perform cardio” that aerobic training in a fasted state leads to muscle loss. Does it work differently for anaerobic exercise?

  • Letheria

    This formula might be helpful to some- I graduated from National Personal Training Institute in Orlando FL as a Personal Trainer in four Months. I love fasting Workouts . Keeps my Body fat percentage on track.

  • Dave Miller

    The 3 Week Diet is an extreme rapid weight loss program that can help you lose up to 23 pounds of pure body fat in just 3 weeks!


  • รัติ พฤษกุล

    It’s very interesting to build muscle gclub . Thanks for the good advice

  • nerdpocalypse

    Yes, all advice right. And the MRI measurement (used in research) is quite close to the calipers.
    And… the working before breakfast (and also right before bed) isn’t necessarily because of fasted state (but, the body isn’t going to both STORE and RETRIEVE calories at the same time…. so… let us not discount the fasted state entirely)
    increasing your calorie burning only works if you are increasing your calorie burning. If you were going to be walking miles at work and take a break to weight lift you might be DECREASING calorie burning rate. But before breakfast and at bedtime your calorie use is at its lowest and exercise changes that the most drastically. I lose a pound (temporarily) overnight every time I do 200+ calories before bedtime:
    1) water loss
    2) glycogen loss
    3) post exercise effect
    4) it really likely works.

  • http://www.f10.tv dmitri bogdanoch

    good topic, very useful Thank you !

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  • Angie

    Body fat percentage is great – don’t focus too much on what the scale does. Instead, focus on how you feel and look!

    Losing weight doesn’t have to take long. If you’re looking for something that works to lose weight quickly and keep it off, I recently discovered The 3 Week Diet online (go to venusfactro.com/try ) on our local news and it really helped me. I went from 195 pounds all the way to 145, so I’m glad I made the change to a healthier lifestyle. If I can do it, you can too! Get up off your butt and do something about your health and fitness! Three weeks from now you’ll wish you have started today… good luck and you can do this! I promise :)Text me if you need some help staying motivated! (706) 968-7729 – I might be a little slow at replying but I’ll do my best to be your free personal trainer. We can be here for each other :)xo,Angie

  • Sonja

    I need help to lose 60 lb please help me help myself

  • Sameer Scott Aamir

    what is the Calculation of Body Fat

  • จรัญ จอมวงศ์

    i will try do this thank good site


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  • Sonia Lulla


    Quoting your text- if you are above 30% body fat, then both your BMI and your body fat
    percentage would tell you that weight loss should be your primary goal.

    When we talk about weight loss, we always purely mean fat loss, right? Im trying to decipher the need for BMI then. Even if I have a “good” BMI, and my fat % is high, weight loss(fat loss) should still be my primary goal.

    Is there something I’m missing?

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  • Charlton

    I get a hydrostatic buddy fat test(water displacement) twice a year. It’s pretty accurate and always consistent, unlike calipers and electric impedance tests, which give me a different result every time.

    I’ve done everything suggested in this article and I’m stuck at 15% though.

  • Michael Kioto

    i find this nice blog you can check for more info http://fat-melt-info.blogspot.gr/

  • http://youaresucky.com BUM 10in30

    Have you guys tried the Skulpt Aim body fat measuring gizmo gadget thing? I have it and it’s pretty darn cool. They say it’s the closest to a dexa scan because it uses multiple sensors unlike the regular electro-scales. They say that the multi-sensors make it non-dependant on how much water your body has. I got it for 199, but it’s on sale for 129: http://budurl.com/skulpt129promoN
    Worth a look!

  • http://youaresucky.com BUM 10in30

    yeah, no need for BMI. It’s stupid, actually.

  • Teeradet Khaongam
  • Bradley Headstone

    Visit http://korr.com/ to find out how to accurately measure body fat.

  • Ina

    question : I look like my bodyfatpercentage is around 25, but the measurements( tape methode) give me number around 33??? What’s wrong?

  • Aloshan Dookie

    as long as you take BCAA’s

  • Teeradet Khaongam
  • devhinvi

    I have been researching these fitness level estimation strategies for the last few weeks. Latest research has shown that the waist-to-height ratio, as a surrogate for body-fat percentage is a highly correlated with premature death from obesity. In general, your waist size should be less than half height, else you are in trouble! Also, the newer Body Shape Index (ABSI), which includes a measure of waist, age and gender, is an even more comprehensive metric. As this research paper suggests, http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0039504, it is much better than BMI, and Waist-to-Height ratio at predicting fitness level. Here’s one calculator for estimating yours: http://deep-calculators.com/body-shape-index-calculator

  • จมาพันธ์ ชูตา

    I was at the gym each day, like so often weight . It’s a bad habit for a healthy you.
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  • จมาพันธ์ ชูตา
  • http://www.msicollege.com MSICOLLEGE

    Really in-depth article, great work. I like the way you clearly defined the body fat percentages and gave visual examples. People get caught up on numbers and forget about the naked eye.

  • Jdavis

    Those percentages seem really low. Those are for being a good athlete, not being healthy, IMO. Having high testosterone lowers body fat and makes you a good athlete, but doesn’t make you healthier. http://bodyfatprcent.com/