Child Daily Water Intake Calculator
Calculate a child's daily maintenance fluid needs by weight using the Holliday-Segar method.
약 1.10L · 200mL 컵 약 5.5컵
계산 내역
결과 공유
⚠️ 반드시 확인하세요
- 이 결과는 Holliday-Segar 공식에 따른 하루 유지수분(총 수분 요구량) 참고치입니다. 물뿐 아니라 모유·분유·우유·국·과일 등 음식 속 수분이 모두 포함된 값입니다.
- 생후 6개월 미만 영아는 모유·분유로 수분을 충분히 섭취하므로 별도의 물을 주지 않는 것이 원칙입니다.
- 발열·구토·설사가 있으면 수분 요구량이 늘어납니다. 탈수 징후(소변 감소, 처짐, 입마름)가 보이면 소아과 진료를 받으세요.
- 신장·심장 질환 등 기저질환이 있는 아이는 반드시 의사와 상담 후 수분량을 조절하세요.
Overview
The Child Daily Water Intake Calculator estimates a child's daily maintenance fluid requirement from body weight using the Holliday-Segar method, a standard formula in pediatrics. Maintenance fluid is the total daily water requirement including water contained in breast milk, formula, milk, soups, and fruits — not just plain drinking water. The calculator also shows the hourly maintenance rate (4-2-1 rule) and an equivalent in 200 mL cups.
Formula
Holliday-Segar method (daily maintenance fluid, mL/day) First 10 kg: 100 mL/kg 10–20 kg: 50 mL/kg Above 20 kg: 20 mL/kg e.g., 12 kg = (10×100) + (2×50) = 1,100 mL/day Hourly (4-2-1 rule): 4 mL/kg for the first 10 kg + 2 mL/kg for the next 10 kg + 1 mL/kg beyond
How to Use
- 1Enter the child's current weight (kg).
- 2Check the daily maintenance fluid amount (mL) with liter and cup equivalents.
- 3Review the breakdown by weight segment (first 10 kg / 10–20 kg / above 20 kg).
- 4Use the hourly rate (4-2-1 rule) to spread intake across the day.
Tips
- ✔Maintenance fluid includes water from all food and drinks — it is not an amount of plain water alone.
- ✔Healthy infants under 6 months get enough fluid from breast milk or formula and should not be given extra water.
- ✔Fever (about 10–12% more per 1℃), vomiting, and diarrhea increase fluid needs; watch for signs of dehydration.
- ✔Children with kidney or heart conditions need fluid amounts adjusted by a doctor.
FAQ
Q. What is the Holliday-Segar method?
Proposed by Holliday and Segar in 1957, it calculates a child's daily maintenance fluid by weight segments: 100 mL/kg for the first 10 kg, 50 mL/kg for the next 10 kg, and 20 mL/kg above 20 kg. It is a standard reference in pediatric fluid planning.
Q. Does my child need to drink this entire amount as water?
No. Maintenance fluid is the total including water in breast milk, formula, milk, soups, fruits, and snacks. For a child eating normal meals, much of it comes from food, and the rest can be supplemented with water or milk.
Q. Should infants under 6 months be given water?
Healthy infants under 6 months get sufficient fluid from breast milk or formula, and giving extra water can risk hyponatremia. Small amounts of water are usually introduced after starting solid foods.
Q. Do fluid needs change when a child is sick?
Yes. Fever, vomiting, and diarrhea increase fluid losses beyond maintenance needs. If you notice reduced urine output, dry mouth, or lethargy, consider oral rehydration solution and see a pediatrician.
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