Convert degrees to percent

[_Salmon]

Hi,
i'm trying to convert from degrees to percent using this formula: "percent = tan (angle) x 100"
why doesn`t work?
thanks

[Barry Kelly]

If 0° = 0% and 90° = 100%, then isn't it just a straight relationship - nothing to do with TAN?

(angle * 100) / 90 should give you the %

i.e. (45° * 100) / 90 = 50


Barry.

[runxel]

Barry wrote:
If 0° = 0% and 90° = 100%, then isn't it just a straight relationship - nothing to do with TAN?

That is a common misconception, but in reality of course 100% inclination equals 45°.
(It's easier to remember, if you know, what x% inclination even means: after 100 meters going "flat", how many meters did the slope go up? (= imagine a right-angled triangle) If the answer is "100", then this triangle obviously has 45° angle)

So, if all you got is the angle, then the inclination in percent is indeed the TAN of the angle * 100.

What's not working on the other side is the additional "STRCALUNIT".
Just use
"TAN ( {the Property of incl.} ) * 100"
and you're good to go.

[_Salmon]

thanks for your help!
But which expression i have to use to publish the % result in a string?
The error is still there

[_Salmon]

Ok. Solved!
So now i'm trying to quit those decimals in the pipe diameter.
Any idea?

[runxel]

USe SPLITLEFT and with the comma as the text where to split.

[Barry Kelly]

runxel wrote:

Barry wrote:
If 0° = 0% and 90° = 100%, then isn't it just a straight relationship - nothing to do with TAN?

That is a common misconception, but in reality of course 100% inclination equals 45°.
(It's easier to remember, if you know, what x% inclination even means: after 100 meters going "flat", how many meters did the slope go up? (= imagine a right-angled triangle) If the answer is "100", then this triangle obviously has 45° angle)

So, if all you got is the angle, then the inclination in percent is indeed the TAN of the angle * 100.

Thanks runxel.
You can tell I don't use % for slopes.

Barry.

[_Salmon]

Done! Thanks Runxel

I started using archicad 21 years ago thanks to people like you.

I hope graphisoft takes into account the importance of the help service we need in the forum

[TJ Admin]

If you are still looking? This is the correct string Formula. Meant to label Roof 'Pitch' "Auto Text":

CONCAT ( STR ( TAN ( {Property:Roof/Pitch} ) * 100; 2 ); "%" )