Tanner Stage Calculator for Boys: Growing Up in the Lord: A Study for Teenage Boys by Jeffrey W. Hamilton

I am steadily growing, but my height hasn't increased rapidly yet.
I am increasing in height faster than before.
I went through a growth spurt, but it seems to have slowed down.
I haven't seen a change in height in over a year.
I'm not certain

When people look at me, I appear more like other children in shape
My feet and hands look too large for my size body
My legs look too long for my sized body
My body proportions are almost like an adult, but I'm more narrow than an adult in the shoulders
When people look at me, they see someone with an adult shape

I'm chubbier now than I was most of my childhood
I was chubby for a while, but I have slimmed down again
I haven't noticed much change.

Voice:

My voice is the same as it has been since childhood
My voice box (Adam's apple) is getting noticeable
My voice breaks or squeaks at awkward times
My voice is distinctly deeper, though it still breaks at odd times
My voice is consistently deeper than it was in childhood.

Body Hair:

I don't have any hair on my legs or arms
I see very fine hairs on my legs and arms.
I distinctly have hair on my legs and arms
I have started growing facial hair
I have hair growing on my chest

There is no hair under my arms
I see some fine hairs growing in my armpits.
I have some hair under my arms, but it is not thick.
I have a typical amount of underarm hair for adults of my lineage.

There is no hair around my genitals
There are fine hairs growing near the base of my penis
There are hairs growing across my groin, but it looks thin and the color is lighter than my head's hair.
There are hairs growing across my groin, which are thick and curly.
There is a strip of hair growing up from my genitals to my navel (belly button).
There are hairs growing across my groin that are thick and curly and it spreads across my inside thighs as well.

Chest:

I have nipples on my chest that are pale and soft like every other child.
A darker ring is forming around my nipples.
My breasts are swelling and sticking out a bit.
There is a distinct ring around my nipples and the nipples stick out a bit.
My chest has increased in size and you can feel hard muscles under the skin.

Face:

My face is the same as it has always been in childhood.
I can see fine hairs on my chin and under my nose.
There are some long hairs on my face, but just a few.
The hair on the side of my face, near my ears is getting distinct
I have to shave or remove hair from my face every once in a while.
If I try growing a beard, it looks scraggly.
I could grow decent sideburns, mustache and perhaps a goatee, but definitely not a full beard
I have to shave or remove hair from my face regularly.
If I wanted to, I could grow a full beard.

My face is the same as in childhood.
I'm starting to break out with acne, but it isn't heavy
I have a really bad case of acne.
My acne is still there, but it seems to be fading.
My acne has faded to the point that I only get a few break outs now.

Genitals:

My scrotum is small and wrinkly like other children
My scrotum looks swollen, but it doesn't hang down.
My scrotum is hanging down, but not as far as an adult.
One testicle is distinctly lower than the other.
My scrotum hangs down like an adult.

My penis is small like a child's
My penis has been getting stiff and erect often recently.

My penis gets bigger in size when it gets stiff and erect.
My penis has gotten longer recently
The head of my penis (the glans) has gotten darker in color.
My penis has gotten larger around recently
The head of my penis (the glans) has a rougher texture now
The head of my penis (the glans) flares out at the base of the glans
My penis looks like an adult's penis

Looking at the chart on the right and using a ruler to make sure the scale is approximately correct, my testicles are about:
1 to 3 ml
4 to 6 ml
7 to 10 ml
11 to 16 ml
17 to 27 ml

I haven't had an ejaculation.
When I get sexually aroused, my penis sometimes drips a clear fluid
I have ejaculated semen
I have ejaculated semen and when I get sexually aroused, my penis drips a clear fluid

Are you curious as to what each stage of development brings? The following pages give a description about the changes which happen in each Tanner stage. Please be forewarned that graphics of the genitals at each stage are given.