Free tool · For parents · The 6-4-2 rule, as a clock

Child fasting before surgery: last-feed planner

Enter your child's surgery arrival time and what they have, and we'll turn the 6-4-2 rule into exact last-feed times for the night — so you're not doing anxious math at 3 AM.

We anchor to the hospital arrival time (which builds in a safety margin before anesthesia). Hospitals vary — always follow the exact times your child's team gives you.
What does your child have? (tick all)

The 6-4-2 rule at a glance

How the hours before surgery break down for a child.

Breast milk + clear fluids OK Clear fluids only water, clear apple juice Nothing by mouth ← Before 6h: solids, formula & milk all OK 6 hrs stop solids/formula 4 hrs stop breast milk 2 hrs stop clear fluids Surgery arrival
The 6-4-2 rule. Some centers now allow clear fluids up to 1 hour — always follow your hospital's exact times.
Medically reviewed by Dr. Saurabh Shukla, MBBS, DNB Anesthesiology · Last updated June 2026

Frequently asked questions

How long before surgery can my baby have breast milk?

Usually up to about 4 hours before the hospital arrival time. Formula or cow's milk needs longer — about 6 hours — and clear fluids like water or clear apple juice are usually allowed up to about 2 hours before. This is the 6-4-2 rule. Always follow your hospital's exact times.

Can my child drink water before surgery?

Yes — small amounts of clear fluid (water, clear apple juice, oral rehydration drinks — nothing with milk or pulp) are usually allowed up to about 2 hours before arrival, and giving them helps a child feel less hungry and upset. Some centers now allow clear fluids up to 1 hour — follow yours.

What is the 6-4-2 fasting rule for children?

It's the standard pediatric guide: stop solid food and formula/cow's milk about 6 hours before, breast milk about 4 hours before, and clear fluids about 2 hours before the surgery arrival time.

What if my child accidentally ate or drank?

Don't hide it — call your surgical team right away. They would rather adjust the plan than risk it. Be honest about exactly what and when. See our accidentally-ate checker.