Calf Milk Replacer Calculator
the same strength in every bucket.
Work out how much powder and water to mix for each feed, how many bags you will use a week and a month, and what it costs per calf per day.
Mixing Plan
Powder = solids % × final mix ÷ powder dry matter.
Each feed (all calves)
Per day, week and month
Mixing Milk Replacer the Right Way
Solids percentage decides how much nutrition each litre carries.
"12.5% solids" means 12.5% of the final mix is milk solids. Because the powder is not 100% dry matter, you need a little more powder than the solids figure suggests: powder = solids % × final mix ÷ powder dry matter. The calculator treats 1 litre of mixed milk as about 1 kg.
Mix the powder into part of the water at the temperature on the bag, stir until smooth, then top up to the final volume. Adding the powder to the full amount of water gives a weaker mix than you planned.
How to use this calculator
- Enter the target solids from the feeding instructions on the bag. The box starts at 12.5%.
- Enter how much mixed milk each calf gets at one feed, the number of feeds per day, and the number of calves fed from the same batch.
- Check the powder dry matter. The box starts at 95%. If the label gives moisture instead, dry matter is 100 minus the moisture figure.
- For bag use and cost, enter the bag size and the price per bag.
- Print the plan and keep it where the milk is mixed, so everyone mixes it the same way.
Reading the result
The first set of boxes is one feed for all the calves together: the powder to weigh, the water to start with, and the final volume to top up to. The second set shows powder per day, bags per week and per month (30 days), and the powder cost per calf per day. Use bags per month to order ahead, so you do not run out and have to change powder suddenly. If you later feed more milk or a stronger mix, run the plan again so your order still matches.
Common questions
Why weigh the powder instead of using a scoop?
Scoops vary with how tightly the powder is packed. Weighing on a kitchen scale keeps every feed the same strength, which helps prevent digestive upsets.
Can I feed more than the label says?
Many farms feed more milk or a stronger mix to grow calves faster. Increase slowly and talk to your vet or nutritionist first.
How many grams of powder is that per litre?
Divide the powder per feed by the final mixed volume. With the default 12.5% solids and 95% dry matter it comes to about 132 g of powder in each litre of finished milk. That is per litre of final mix, not per litre of water, so check which one your bag label means.
How do I keep calves from getting upset stomachs?
Keep every feed the same: the same strength, the same temperature and the same times each day. Clean buckets, bottles and teats after each feed, and throw away mixed milk that is left over rather than keeping it for the next feed.
What does "cost per calf per day" include?
Only the milk replacer powder, worked out from your bag price and bag size. Calf starter, water, labour and vet costs are not included.
Decision support only. Not a substitute for your veterinarian.