wheel calculator

  • A wheel calculator is made of concentric paper or plastic discs, used to make calculations involving time periods. They have applications in pregnancy and insurance.


  • the state of being pregnant; the period from conception to birth when a woman carries a developing fetus in her uterus
  • The condition or period of being pregnant
  • (pregnant) carrying developing offspring within the body or being about to produce new life
  • (pregnant) meaning(a): rich in significance or implication; “a meaning look”
  • A case or situation of being pregnant


  • Controlled by or connected to another computer or to a network
  • on-line(a): being in progress now; “on-line editorial projects”
  • on-line: on a regular route of a railroad or bus or airline system; “on-line industries”
  • Connected to the Internet or World Wide Web
  • on-line: connected to a computer network or accessible by computer; “an on-line database”

online pregnancy wheel calculator

Weather Wheel 7

Weather Wheel 7The “Get It Right” method – you will need a piece of paper, pencil and scientific calculator for this one:

Diameter = D
Number of weather slices = N (7 in our case)
X = Width of the slices at the edges

X = D*sin(180/n)

You then pick a point on the edge of your original and measure X distance from there, all the way around.

For example:
Our circle was 10.75″ in diameter. Eric got out the scientific calculator and did the following:
Divided 180 by 7
Times 10.75

He got 4.66 roughly
(Eric just said that there is an assumption with his that sine takes degrees, not radians. I don’t have any idea what the heck that means but he says if radians, change the 180 to pi)

“Get It Done” – You’ll need a calculator and to know pi=3.14(etc)
D = Diameter
C = Circumference
N = Number of slices (7 in our case)
X = Width of the slices at the edges

X = C/N

You then pick a point on the edge of the circle and measure X around the edge from there.

For example:
Our circle was 10.75″ in diameter. I multiplied that by 3.14.
I got 33.77.
I divided that by 7

I got 4.82

So the difference ended up being relatively small. I’m just a fan of mine because it was 1 whole minute of work while he took 10 to work out the formula and whatnot. I ended up measuring about 4.75 from one dot to the next. Worked fine.

HP 9826 Desktop Computer (1980)

HP 9826 Desktop Computer (1980)

Running 3D hidden line removal program.


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