Set up a two-column table somewhere which is similar to your chart,
eg:

0.5 23
1.0 45
1.5 68
2.0 91

and so on. Suppose this occupies G1:H15. Then, if you enter your
measurement in A1, you can have this formula in B1:

=IF(A1=0,0,VLOOKUP(A1,G$1:H$15,1))

to give you the volume. You could make it more accurate by
interpolating between vertical heights, although you do not suggest
that this is what you do currently.

Another way would be to just calculate the volume from the height,
assuming you know the diameter (and thus the cross-sectional area) of
the tank.

Hope this helps.

Pete

On Sep 17, 5:26*pm, Scotty <Scotty @discussions.microsoft.com wrote:
I have a tank that I measure daily to see how many gallons are in. I measure
it with a stick and then look at a chart made for the tank to see how many
gallons it equals. I would like to set up excel so that I can enter in the
stick measurement and it will give me the gallons in the next column
automatically. Any suggestions on how to do this?