Given back and ahead grades (in percent), plus the elevation and station of the PVI as well as the length of curve, this program will calculate the elevation and slope of any given station.

If the given station is not on the curve the elevation will be calculated on the back or ahead grade appropriately. Also calculates low (or high) point station and elevation (if one exists).

This program is for symetric vertical curves (PVI is halfway between PVC and PVT) and is designed for feet, but will work for metric if you enter meters (don't use stations and leave the + sign off; e.g. STA 10+00 would just be 1000).