Hello,

This is my the first time here.

How can I calulate the amount of liquid in a fuel oil tank if the tank is not level?

Looking down from the top of the tank there is an x and y axis. The x axis is running the length of the tank and the y is front to back. At one end I have a sensor measuring  the height of the liquid. If the tank is off on the y axis I wiil get a false reading. The same holds true for the x axis.
If both are off the same, a false reading. 

I was never good at math. So if someone has a formula I would very much appreciate it. Or point me in the right direction.

Thank you for any and all help,

Ken