The problem with Jeb_'s comment is that the eye of ender tracks the entrance of the stronghold instead of the portal.
I did 5+ trials of different strongholds and the eye of ender always leads to a spiral staircase that's at the top of the stronghold. Go to the XZ where the eye leads (Also subtract ~3 on the x-axis and z-axis) and you get the center of the spiral staircase.
Jacob Woodley
The problem with Jeb_'s comment is that the eye of ender tracks the entrance of the stronghold instead of the portal.
I did 5+ trials of different strongholds and the eye of ender always leads to a spiral staircase that's at the top of the stronghold. Go to the XZ where the eye leads (Also subtract ~3 on the x-axis and z-axis) and you get the center of the spiral staircase.