To calculate the proportions of concrete you require please use our calculator tool below. For example, for a 5m2 trench of a depth of 1/4 metres input:
(height) 5 X (width) 5 X 0.25 (depth)
Alternatively, you can click here to use our Screed Calculator or for screed and concrete delivery prices please get in contact with us directly via the contact section of our site.