# unikatissima'sSupport unikatissimaby ...

…compilation of tutorials

## Online Cone Calculator

http://www.unikatissima.de/e/?p=2117    (back to normal view)

Monday, April 20, 2009 » Tags/categories of entry

My entry ‘Constructing a Cone’ was much to wordy ;-), therefore I wrote an online cone calculator.

Note: Unfortunately the online cone calculator seemingly doesn’t work under all circumstances and I don’t have the time to struggle through. That’s why I write the formula by all means behind.

Well, you have disabled javascript, which means that the online cone calculator doesn’t work anyway.

You have 2 options now:

• enable javascript
• calculate the cone data yourself using the following formula.

Formula:

 The black cone is what we want to get. small diameter = smaller desired diameter large diameter = larger desired diameter height = desired height QT = small diameter / 2 RS = large diameter / 2 PQ = QT * height / (RS – QT) PR = PQ + height PT = √((PQ * PQ) + (QT * QT)); PS = √((PR * PR) + (RS * RS)); (√ is sqrt is square root) angle to cut away =360 * (1 – ((2 * π * RS) / (2 * π * PS))) inner circle diameter = 2 * PT; outer circle diameter = 2 * PS;

And now proceed:
Draw two centered circles with the inner and outer diameter, draw the calculated angle and cut it away.
The result should be a template for a cone with the specified measurements ;-)
If you don’t have a protractor you can print and cut the degrees disk from the entry ‘Constructing a Cone’.

If you want to know more exactly what you’re doing here, check the entry ‘Constructing a Cone’ after all ;-)

Here at unikatissima: ‘Constructing a Cone’

(up to now 60 little heart(s) from 13 rating(s), in average 4.62 little heart(s))

1. Lexica

Thank you for this calculator, and for the other article where you explain the geometry behind it!

2. Susann

Lexica,

you’re welcome and I’m always glad if someone likes or even uses my generators ;-)

3. orly

Appreciate your effort. I’m always looking for examples to show my children why the should study maths.

4. Susann

orly,

I love being an example to children ;-))
But you’re right of course: math can be sooo helpful at times!

5. Tony

Thank you sooo much for this. I used the above to make a combustion chamber for a pulse jet engine lol. It worked first time and was perfect. Saved me many hours of mucking around :-)Many thanks

6. Susann

Tony,

Amazing!
I’d never thought that you’d need a cone to make a combustion chamber for a pulse jet engine!
;-)

7. Phil

Worked it through three times, three different results none of which looked convincing. Used your machine and at last a decent result, and I thought I was good at maths! Thanks.

8. Susann

Phil,

How good that it worked for you! :)

And by the way: I feel that you’re not bad at maths only because you have problems with such a calculation! ;-)

9. Aaron

Does this factor in any overlap?

10. Susann

Aaron,

“Does this factor in any overlap?”
No, it doesn’t.
You’ll have to make an overlap on your own.

Enjoy and good success!

11. Janis

Thank You for this great calculator, it saves my time and lot of paper :)

12. Susann

Janis,

I am glad that you have a use for it :)

### 1 ping

XHTML: You may use the following tags: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>

Some patterns are free, I'm not presenting them all here in the blog.

Latest patterns:

• ## Donate:

If you like unikatissima you can donate any sum that you feel appropriate here:

Note: you can send money via PayPal up to 3x without having to registrate there.

For a certain time I crafted like mad - and acquired a great deal of websites with fantastic tutorials.
Now I'd like to share :)
Have fun, Susann

## Tags

Advent Altered Beads Bracelet Card Cardboard Card making Container Crochet Earring Fabric Food Food Decoration Freeform Jewelry Knitting Miscellaneous Nature Necklace Paper Paper Cut Paper Folding Pendant Pin Plastic Recycling Ring Self-made Tools Sewing Yarn