Daily water intake calculator API

Estimate daily water need from bodyweight (35 mL/kg) plus an exercise adjustment (350 mL per 30 min), returning litres, 8-oz cups, and a base/exercise breakdown. Answers 'how much water should I drink', 'daily water intake for 80kg', 'hydration with exercise', 'water intake calculator'.

Price$0.01per request

MethodPOST

Route/v1/health/water-intake

StatusLive

MIME typeapplication/json

Rate limit120/minute

CacheNo cache

healthwaterhydrationintakenutritionfluidswellnesscalculator

API URLhttps://x402.hexl.dev/v1/health/water-intake

Integration docs

Example request

{
  "weightKg": 80,
  "exerciseMinutes": 60
}

Example response

{
  "waterMl": 3500,
  "waterLiters": 3.5,
  "cups8oz": 14.6,
  "formula": "35 mL/kg + 350 mL per 30 min exercise",
  "breakdown": {
    "baseMl": 2800,
    "exerciseMl": 700
  },
  "inputs": {
    "weightKg": 80,
    "exerciseMinutes": 60
  }
}

Input schema

{
  "type": "object",
  "required": [
    "weightKg"
  ],
  "properties": {
    "weightKg": {
      "type": "number",
      "examples": [
        80
      ]
    },
    "exerciseMinutes": {
      "type": "number",
      "default": 0,
      "examples": [
        60
      ]
    }
  }
}

Output schema

{
  "type": "object",
  "additionalProperties": true
}