Pallet density is a description of the total density of the loaded pallets, where the goods are transported.
The default is set to 0.3 tonnes/m3, which is representative for many food products, such as fresh fruit. If you have other information on the pallet density for a certain transport/ingredient/product in your product chain, you can change the pallet density yourself.
The pallet density value in the dialogue window only affects the climate footprint assessment for light goods (typically less than 0.3 tonnes/m3). In that case volume will be the limiting factor of the vehicle, and it will carry a reduced weight compared to its maximum weight capacity. (Remember that the climate footprint is calculated per kilogram of food product.) For heavy goods, on the other hand, (typically more than 0.3 tonnes/m3), it will be weight that is the limiting factor, and the exact value of the pallet density will not affect the climate footprint per kilogram transported. If this seems complicated, don’t worry about it. Just make sure you state the right pallet density for light products such as popcorn, crisps etc.