Typical weights of various size hay and silage bales

Note that measurements below are empirical, reflecting standard hay/silage making machines.

Hay

Bale shapeBale sizeWeight (as fed, t)Dry Matter (%)Dry weight (t DM)
Round4x40.25850.21
Round5x40.35850.30
Round5x60.50850.43
Square8x3x30.30850.26
Square8x4x30.60850.51
Square8x4x40.75850.64
Small Squares0.025850.02

Silage

Bale shapeBale sizeWeight (as fed, t)Dry Matter (%)Dry weight (t DM)
Round4x40.60400.24
Round5x40.75400.30
1 cubic metre (wilted)0.58300.17
1 cubic metre (direct cut)0.83180.15
1 cubic metre maize silage0.5350.18

Source: Pasture consumption calculator (V1)