What Is The Volume Of My Tank?

[Fontaine]

So, I'm afraid to admit I bought a nondescript tank off ebay to use as my breeding tank.

It's not very big at all, but I've not idea what the volume is.

It's 6-sided, but not a conventional hexagon.

The "back" is 15.5inches long.
The "front" is 9 inches.
The remaining four sides are 4.5inches.
The tank is 9 inches tall.

Can anyone calculate the volume? I'm terrible with maths!

Answers in Litres, please!

EDIT: The tank is 7.5inchs wide (front-to-back)

 

[Fontaine]

I think I've worked it out:

I divded it into 3 quatrilaterals and 2 triangles.

9x7.5 = 67.5 (main central quad)
15.5 - 9 = 6.5 / 2 = 3.25 x 4.5 = 14.625 (2 outer quads)
7.5 - 4.5 = 3 x 3.25 = 9.75 / 2 = 4.875

67.5 + 14.625 + 14.625 + 4.875 + 4.875 = 106.5 x 9(height) = 958.50 cubic inches

Conversion app online makes that 15 litres...

I have no idea if that's right... Help!

 

[phoenixgsd]

there is a calculator tab at the top of the page

 

[Fontaine]

Thanks, but said calculator does not seem to cater for a tank with 6 sides of varying length.