Each material that you excavate will have different properties in terms of how easy they are to dig.
The most common way of categorising a soils digability or ease of digging is:
E = Easy digging – Loose free-running soils eg sands, fine gravels.
M = Medium – Denser cohesive soils eg clayey gravel, low PI clays
M-H = Medium to Hard – eg broken rock, wet heavy clay, gravel with boulders
H = Hard – material requiring blasting and hard high PI clays
In our calculator below, you will see the materials digability using the “E”, “M”, “M-H”,”H” format.