Help With Calculating Cubic Metres With a Slopped Roof Information and advice on lofts and loft conversions. Find solutions and post your questions here...

[symbiosis]

Hi all
Trying to work out the m3 of my proposed loft space and am stumped how I can calculate it with the sloping roof line.

Its 2m at highest point sloping down to 1.2m walls. Obviously if it were just a square it would be L X W X H but what do I use for the height in this scenario?

Thanks