CowpanionHow Much Milk Does a Bottle Calf Need? Bottle Feeding Basics
Updated: November 4, 2026
A simple rule covers most bottle calves: feed milk at 10–15% of body weight a day, split into two or three feedings, at the same times every day.
How much
A simple rule: feed milk at 10–15% of the calf's body weight per day, split into two or three feedings. A 40 kg (90 lb) calf gets about 4–6 L (4–6 qt) a day. Cowpanion's bottle feeding tool gives exact numbers, and adjust as the calf grows.
- Avoid more than about 4 L (4 qt) in a single feeding.
- Mix replacer exactly as the label says. Too strong or too weak both cause scours.
- Feed at body temperature, about 39 °C (102 °F).
Quick feeding table
| Calf weight | Milk per day | Per feeding |
|---|---|---|
| 30 kg (65 lb) | 3 L (3.2 qt) – 4.5 L (4.8 qt) | 1.5 L (1.6 qt) – 2.2 L (2.4 qt) × 2 |
| 35 kg (75 lb) | 3.5 L (3.7 qt) – 5.2 L (5.5 qt) | 1.8 L (1.8 qt) – 2.6 L (2.8 qt) × 2 |
| 40 kg (90 lb) | 4 L (4.2 qt) – 6 L (6.3 qt) | 2 L (2.1 qt) – 3 L (3.2 qt) × 2 |
| 45 kg (100 lb) | 4.5 L (4.8 qt) – 6.8 L (7.1 qt) | 2.2 L (2.4 qt) – 3.4 L (3.6 qt) × 2 |
| 50 kg (110 lb) | 5 L (5.3 qt) – 7.5 L (7.9 qt) | 2.5 L (2.6 qt) – 3.8 L (4 qt) × 2 |
| 60 kg (130 lb) | 6 L (6.3 qt) – 9 L (9.5 qt) | 2 L (2.1 qt) – 3 L (3.2 qt) × 3 |
Based on the 10–15% rule, with no more than about 4 L (4 qt) per feeding. Always check your milk replacer label.
Consistency matters
Same times, same mix, same temperature, every day. Changes in any of them are a common trigger for scours.
Water and starter
Offer fresh water from the first few days, separate from milk. Put a small handful of calf starter in the calf's mouth after feeding to get it interested. Starter is what grows the rumen, so the sooner the calf eats it, the easier weaning will be.
- Keep starter fresh. Throw out wet or old feed every day.
- Good hay can wait until the calf is eating starter well.
Week by week
- Week 1: colostrum first, then milk at the same times every day. Check the navel and take the temperature daily. Offer water.
- Week 2: the riskiest time for scours. Score manure daily and keep electrolytes on hand. Start offering a handful of calf starter.
- Week 3: starter intake should be picking up. Keep water fresh. Ask your vet about disbudding and vaccines now.
- Week 4: weigh or tape the calf and update its feeding amount. Watch for coughs and runny noses.
- Week 5: many calves eat 0.5 kg (1 lb) of starter a day now. Keep an eye on growth.
- Week 6: weaning can start once the calf eats about 1 kg (2 lb) of starter a day for 3 days. Cut to one bottle a day.
- Weeks 7–8: most calves are weaned now. Keep starter and water in front of it and introduce good hay slowly.
- Past 8 weeks: if the calf is eating starter well, it's time to wean. Keep weighing every few weeks.
Keep it all in Cowpanion
Cowpanion works out how much milk and powder per feeding for each calf (in litres and grams, or quarts and ounces) and updates it as the calf grows.
This guide is general information, not veterinary advice. Always follow product labels and call your vet when an animal is sick.
More guides
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How to score calf manure, check for dehydration, use electrolytes and know when calf diarrhea needs a vet.
Read guide →Bottle calvesWhen and How to Wean a Bottle Calf
Wean bottle calves by starter intake, not just age. How much starter they should eat and how to cut back milk without setbacks.
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