Livestock Feed Ration Calculator
Turns a dry matter ration into the weights of feed you put out.
Share sends a link that reopens these numbers. Copy details pastes the full breakdown as a list.
The formula
dry matter per head = liveweight × intake % as-fed = dry matter × share ÷ feed DM % ÷ (1 − wastage)
Rations are balanced on dry matter because feeds hold very different amounts of water. Silage at 30% DM takes about three times the fresh weight of a dry feed to supply the same dry matter.
What to watch out for
Protein alone does not make a balanced ration. Energy, minerals and fibre matter too, and sudden changes can cause digestive upset, so change feed gradually.
Frequently Asked Questions
How much does a 600 kg animal eat?
At 2.5% of liveweight, 15.0 kg of dry matter a day. In silage at 30% DM, that is 50 kg fresh weight.
What is dry matter?
What remains of a feed once the water is removed. Comparing feeds on this basis makes the nutrients comparable.