Syke wrote:

My oil tank is: Length= 5ft, Height = 4ft, Width = 2ft. It holds 1100
litres My question is, how much oil is represented by 1 inch on a dipstick?

Assuming zero wall thickness and truly rectangular tank
5 x 2 x 1/12 = 1.2 cu ft

which is a little over 7.5 gallons, or 34 litres.

Checking for reasonability, your 1100 litres should therefore
occupy 1100/34 inches, which is about 2.7 feet

I leave it to you to adjust the figures to reflect the actual
shape of your tank.

Chris
--
Chris J Dixon Nottingham UK


Plant amazing Acers.