Hi, I was wondering what is way to measure your body fat percentage. I read online and found that average and healthy human should have 20 percent or less body fat . And if you have 10% body fat and good muscle then you will look really nice.

So I would I get to know my body fat percentage ? Is it a medical test of tissue or something or it is simply some measurement and calculation ?

I think it is measured by your Body size , height , body weight. There are many online calculator for body fat percentage tester.