In Garmin connect, I can see elevation profiles from my rides, or from routes I haven't ridden on. The problem is that I can't visually compare the grades because the scales are different. For example:



Is there any free app or web site for which I can import my data and adjust scales (or display a plot of grades) to get a better comparison?

Thanks.

ridewithgps.com has a lot of information for an uploaded GPS track.

For example, this Blue Ridge Parkway ride:


You can switch to Terrain View and zoom in on the google map. The metrics tab shows statistics.





Click on the Average Grade at Each Speed thumbnail (I like this.)








Drag to select a section of the elevation graph, and get statistics just for that section. I use this a lot. Slide the current position marker along the graph to get stats from that point in the ride, including grade%.

gpsvisualizer.com will let you upload GPS routes or tracks and generate elevation profiles with your choice of scale and range for both axes so that you can compare profiles. It's a free service.