How Much Milk Should Your Baby Drink? A Month-by-Month Guide

Babies grow fast, and feeding the right amount at each stage protects their brain, bones, and immune system. Below is a concise, evidence‑based roadmap for how much milk (breast or formula) a baby needs from birth through the first year. Use the numbers as a daily “check‑list” rather than a rigid rule—every infant is unique, but the ranges are grounded in AAP, CDC, and WHO data.

Rule of Thumb: 2.5 oz per pound of body weight (max 32 oz/day formula)

1. Weigh your baby in pounds (e.g., 8 lb ≈ 3.6 kg).
2. Multiply by 2.5 oz → 20 oz of milk per day.
3. Never exceed 32 oz/day of formula; excess calories can stress immature kidneys and increase obesity risk (AAP, 2022).
4. Adjust up or down by 10–15 % based on diaper output and weight trend.

When to call 911: Baby is lethargic, not waking for feeds, or has a dry mouth and fewer than 3 wet diapers in 24 hours.

Newborn (0–1 month)

• Typical feed: 1–2 oz every 2–3 hours (≈ 8–12 feeds per day).
• Total daily volume: 8–24 oz (≈ 240–720 ml).
• Breast‑milk vs. formula:
  • Breast‑milk: 60–90 ml per feed; let the infant empty one breast before offering the second.
  • Formula: 30–60 ml per feed; shake the bottle gently to avoid air bubbles.

Signs baby is getting enough:

• ≥ 6 wet diapers / day (each diaper ≈ 1–2 oz urine).
• Steady weight gain of 150–200 g / week (CDC growth charts).
• Content after feeds, with relaxed hands and soft belly.

Signs of underfeeding:

• < 4 wet diapers / day.
• Weight loss > 5 % of birth weight after 2 weeks.
• Persistent fussiness that calms only after a large feed.

Signs of overfeeding:

• Frequent spit‑up (> 2 times per day) with forceful vomiting.
• Gassiness, hard belly, or rapid weight gain (> 30 g / week).

Action steps if you suspect a problem:

1. Track feed volume and diaper output for 24 hours.
2. Re‑weigh baby on a calibrated scale.
3. Contact your pediatrician if wet diapers stay below 4 or weight loss exceeds 5 % of birth weight.

1 Month (30–44 days)

• Typical feed: 3–4 oz (90–120 ml) every 3–4 hours.
• Total daily volume: 24–32 oz (≈ 720–960 ml).
• Feeding cue: Baby turns head toward the breast or bottle, opens mouth, and sucks rhythmically.

Signs baby is thriving:

• 6–8 wet diapers / day.
• Weight gain of 150–200 g / week.
• Alert, smiling, and relaxed between feeds.

Growth‑spurt tip: During a 2‑week growth spurt (often at 4–6 weeks), feeds may increase by 1 oz per session. This is normal; return to baseline once the spurt ends.

2 Months (45–89 days)

• Typical feed: 4–5 oz (120–150 ml) every 3–4 hours.
• Total daily volume: 28–34 oz (≈ 840–1,010 ml).
• Formula limit: Do not exceed 32 oz of formula per day; extra calories should come from breast‑milk if needed.

Signs of adequate intake:

• ≥ 6 wet diapers / day.
• Weight gain of 150–200 g / week (WHO growth standards).
• No prolonged periods of crying (> 30 min) after feeds.

When to adjust:

• If baby consistently finishes 5 oz and still looks hungry, add 0.5–1 oz per feed.
• If baby leaves > 1 oz in the bottle regularly, reduce the next feed by 0.5 oz.

4 Months (90–119 days)

• Typical feed: 5–6 oz (150–180 ml) every 3–4 hours.
• Total daily volume: 30–34 oz (≈ 900–1,010 ml).
• Breast‑milk: Expect 150–180 ml per session; let the infant nurse until they release the breast.

Signs baby is ready for solids (≈ 4–6 months):

• Able to sit with minimal support.
• Shows interest in foods (reaches for spoon).
• Keeps head steady for ≥ 30 seconds.

Feeding tip: Continue milk feeds as primary nutrition; solids should start at 1–2 tsp / day and increase slowly.

6 Months (120–179 days)

• Typical feed: 6–8 oz (180–240 ml) every 3–4 hours.
• Total daily volume: 24–32 oz (≈ 720–960 ml).
• Plateau point: Milk volume often plateaus because solids begin to supply 30–40 % of calories (AAP, 2023).

Introducing solids:

1. Offer iron‑fortified single‑grain cereal mixed with 1–2 tsp (5–10 ml) breast‑milk or formula.
2. Gradually increase to 2–4 oz (60–120 ml) of pureed fruit/veg per meal, 2 times / day.
3. Keep milk feeds at 6–8 oz / feed; do not drop below 24 oz / day total.

Signs of adequate intake with solids:

• 6–8 wet diapers / day.
• Steady weight gain of 150–200 g / week.
• Baby appears satisfied after each meal and shows normal sleep patterns (≈ 12–14 hours / night).

Signs of overfeeding with solids:

• Persistent spit‑up or vomiting after solids.
• Rapid weight gain (> 30 g / week) after solids are added.
• Diarrhea or hard stools (may indicate too much formula).

8 Months (180–239 days)

• Typical feed: 6–8 oz (180–240 ml) every 3–4 hours, plus 2–3 solid meals (≈ 4–6 oz / day total solids).
• Total daily volume: 24–32 oz (≈ 720–960 ml).

Feeding progression:

• Offer soft‑cooked vegetables, fruit purees, and iron‑rich meats.
• Introduce finger foods (soft‑cooked carrot sticks, small pieces of banana) at 6–8 months.

Monitoring:

• Continue to count wet diapers; ≥ 6 per day is the benchmark.
• Use WHO growth charts to verify weight percentile remains stable (± 2 percentile lines).

12 Months (360 days)

• Typical feed: 16–24 oz (480–720 ml) of whole milk or continued formula, divided into 3 feeds / day.
• Total daily volume: 24–32 oz (≈ 720–960 ml) of milk plus ½ cup (120 ml) of solid foods 3 times / day.

Transition to cow’s milk (if not already on formula):

• Start with 2 oz (60 ml) whole milk mixed with 2 oz (60 ml) formula, gradually increasing to 8 oz (240 ml) of milk alone by 12 months.
• Ensure iron intake ≥ 11 mg / day (iron‑fortified cereals, meat, beans).

Signs of successful transition:

• ≥ 6 wet diapers / day.
• Weight gain of 100–150 g / month (slower than earlier months, per WHO).
• No signs of constipation (soft, formed stools) or dehydration.

When to stop counting ounces:

• After 12 months, focus on nutrient quality rather than precise volume.
• Aim for 400–500 ml / day of milk (≈ 13–17 oz) and a varied diet of whole grains, proteins, fruits, and vegetables.

Quick Reference Table (Milk Only)

| Age (months) | Feed Size (oz) | Frequency | Daily Total (oz) | Typical Solid Introduction | |--------------|----------------|-----------|------------------|-----------------------------| | 0–1 | 1–2 | Every 2–3 hr | 8–24 | — | | 1 | 3–4 | Every 3–4 hr | 24–32 | — | | 2 | 4–5 | Every 3–4 hr | 28–34 | — | | 4 | 5–6 | Every 3–4 hr | 30–34 | Pureed fruit/veg (1 tsp) | | 6 | 6–8 | Every 3–4 hr | 24–32 | Iron‑fortified cereal (1–2 tsp) | | 8 | 6–8 | Every 3–4 hr | 24–32 | Soft finger foods | | 12 | 8–12 (milk) | 3 times / day | 24–32 | Whole‑milk diet, ½ cup solids 3 × day |

Action Checklist for Parents (Use at Every Well‑Child Visit)

1. Weigh baby on a calibrated scale; compare to WHO percentile curves.
2. Count wet diapers (target ≥ 6 / day).
3. Record each feed size and interval for 3 consecutive days.
4. Assess stool consistency; aim for soft, formed stools.
5. Adjust feed volume by 0.5 oz increments based on hunger cues and diaper output.
6. Consult your pediatrician if weight gain falls outside 150–200 g / week (0–6 months) or 100–150 g / month (6–12 months).

By following these concrete numbers and monitoring cues, you’ll keep your infant nourished, thriving, and on a healthy growth trajectory through the first year.