when you are erect or soft.......with both you are extremely small. i am 13 too and my dick is 5.5 inches hard so you should see a doctor
That is okay. Penis sizes vary a lot from person-to-person.
No.
Six inches is average; 5.7" is close enough to qualify as normal. And the precise length of a penis is much less important than many people imagine it to be.
half inch or less
3 inches to the nearest inch and 3 inches to the nearest half inch both refer to a length not less than 2.5 inches and less than 3.5 inches. 3 inches to the nearest quarter inch refers to a length not less than 2.75 inches and less than 3.25 inches.
It's a little less than 13 millimters
A centimeter is pretty short, less than half an inch.
It is easy to put a 2-inch long piece of conduit that is less than half an inch in any cross-sectional measure into a half-inch conduit.
An inch is 0.0254 metres. Half of this is 0.0127 metres. And, with a bit of tweaking, we can get this to 0.01 metres, or 1 centimetre.
its perfectly healthy. It is quite possible you haven't hit puberty yet, which will affect penis size. Also if that is 1 inch is non erect, the penis can "grow" as it is being filled with blood to be quite longer. There is also a chance that you could just have a smaller penis, which is still perfectly healthy
Generally less than half an inch, say a centimetre.
That depends on the ruler. If you refer to a 1 foot ruler, divided in inches and sub-inch divisions, then 0.39 inch is a more than a quarter inch, and less than a half inch.