Gradient - percentage to "1 in x" to degrees diagram - where did I see it?

[beanzontoast]

Somewhere on Cycle Chat post about measuring gradients or hills, I recently saw a diagram (looking a bit like a quarter of a 360 degree protractor) showing gradient percentages from 0 to 100% with the corresponding "I in x" and slope in degrees. I've searched but cannot find the post. Can anyone enlighten me please?

 

[youngoldbloke]

If you Google 'gradient chart' this is the first image you see.

 

[beanzontoast]

If you Google 'gradient chart' this is the first image you see.

Thanks for the link and that's similar - but it's not the actual image I saw here which was a lot clearer to me. It was literally a 90 degree section (upper right quadrant of a 360 degree protractor) with all the info on it. It went all the way from 0 degrees to 90 degrees in 10 degree steps. Anyone?

 

[IDMark2]

Like this perhaps?

 

[ColinJ]

Here's a list of approximate '1-in-' gradients ...

• 2% ~= 1-in-50
• 3% ~= 1-in-33
• 4% ~= 1-in-25
• 5% ~= 1-in-20
• 6% ~= 1-in-17
• 7% ~= 1-in-14
• 8% ~= 1-in-12
• 9% ~= 1-in-11
• 10% ~= 1-in-10
• 11%~= 1-in-9
• 12-13% ~= 1-in-8
• 14-15% ~= 1-in-7
• 16-18% ~= 1-in-6
• 19-22% ~= 1-in-5
• 23-28% ~= 1-in-4
• 29-39% ~= 1-in-3
• 40%+ ~= a wall or a cliff!