Water Intake Calculator
Overview
Calculate daily water intake needs based on weight, activity level, and climate. Get personalized hydration goals with hourly targets and bottle count.
Key Facts
| Field | Value |
|---|---|
| Calculator ID | water-intake |
| Category | Health |
| Vertical | Health & Fitness |
| App route | /verticals/health/water-intake |
| API endpoint | /api/public/calculate?id=water-intake |
Inputs
| Input ID | Label | Type | Required | Default | Constraints |
|---|---|---|---|---|---|
unitSystem | Unit System | select | Yes | imperial | - |
weightLbs | Weight (lbs) | number | Yes | 150 | min 50, max 500 |
weightKg | Weight (kg) | number | Yes | 70 | min 20, max 250 |
activityLevel | Activity Level | select | Yes | moderate | - |
climate | Climate/Temperature | select | Yes | temperate | - |
How to Use
- Enter Weight — Enter your body weight in pounds or kilograms
- Select Activity and Climate — Choose your activity level and typical climate/temperature
- View Daily Goal — See your personalized daily water intake goal and hourly targets
Result Surfaces
| Output | Display Type | Format |
|---|---|---|
| Computed results | result-card | - |
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FAQ
How much water should I drink per day?
General guideline: 0.5 oz per pound of body weight (or 30 ml per kg). A 150 lb person needs 75 oz (2.2 liters) daily. Active individuals need 15-40% more. Climate matters - add 15% in hot weather. Adjust based on thirst, urine color (pale yellow is ideal).
Do I need more water if I exercise?
Yes. Add 12 oz (350ml) for every 30 minutes of moderate exercise. For intense workouts, add 16-20 oz per hour. Weigh yourself before/after exercise - drink 16-24 oz per pound lost. Electrolytes important for workouts over 60 minutes.
Can I drink too much water?
Rare but possible. Hyponatremia (water intoxication) occurs when drinking excessive amounts rapidly (several liters per hour), diluting blood sodium. Signs: nausea, headache, confusion. For most people, thirst is reliable - drink when thirsty, stop when satisfied.
Evidence
src/lib/calculators/registry.ts(metadata)src/lib/calculators/page-registry.ts(page/HowTo metadata)src/lib/calculators/health/water-intake.ts(calculator config)
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