I don't have a GPS so I'm trying to do this manually. If I have the ground distance, and the elevation change (as close as possible) from GMAP, how do I use the information to calculate the grade percentage? I've seen and read this post:

onlineconversion.com/forum/forum_1086616424.htm

but, I don't have the angle of the hill.

I've also seen and read this post:

gmap-pedometer.com/phpBB2/viewtopic.php?t=208

but, the final numers do not seem right.

The GMAP route, or hill, is this one:

gmap-pedometer.com/?r=645811

Using these two posts as reference, the final grade percentage comes out to 6%, which I think is wrong. Obviously, I need to manipulate the numbers I am getting in a different method than I am, or the GMAP values are wrong (which I doubt). So, for an elevation change of 31m, and a distance of 559m, what is the grade? On this hill, on my bike, I can start at the top, dead stop, and coast to 65kph by the time I hit the bottom. That's got to be more than 6% grade.

Any help is appreciated, thanks.

onlineconversion.com/forum/forum_1086616424.htm

but, I don't have the angle of the hill.

I've also seen and read this post:

gmap-pedometer.com/phpBB2/viewtopic.php?t=208

but, the final numers do not seem right.

The GMAP route, or hill, is this one:

gmap-pedometer.com/?r=645811

Using these two posts as reference, the final grade percentage comes out to 6%, which I think is wrong. Obviously, I need to manipulate the numbers I am getting in a different method than I am, or the GMAP values are wrong (which I doubt). So, for an elevation change of 31m, and a distance of 559m, what is the grade? On this hill, on my bike, I can start at the top, dead stop, and coast to 65kph by the time I hit the bottom. That's got to be more than 6% grade.

Any help is appreciated, thanks.

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