Water Intake Calculator API

POST https://api.findutils.com/api/tools/water-intake-calculator/execute

Calculate a recommended daily water intake in liters, ounces, cups, and 250 ml glasses, plus a per-waking-hour amount. Starts at 33 ml per kg of body weight and adjusts for age, activity level, climate, caffeinated drinks, pregnancy, and breastfeeding.

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Request body

application/json

weight

number required

Body weight in kg (metric) or lbs (imperial).
age

integer required

Age in years (1-120). Under 18 adds 10%, over 55 removes 5%.
unit_system

string optional

Unit system for weight. One of metric · imperial. Default "metric".
activity_level

string optional

Activity multiplier: sedentary 1.0, light 1.1, moderate 1.2, active 1.35, very_active 1.5. One of sedentary · light · moderate · active · very_active. Default "moderate".
climate

string optional

Climate multiplier: cold 0.95, moderate 1.0, hot 1.15, very_hot 1.3. One of cold · moderate · hot · very_hot. Default "moderate".
caffeine_drinks

integer optional

Caffeinated drinks per day (0-20). Each adds 350 ml. Default 0.
pregnant

boolean optional

Adds 300 ml when true. Default false.
breastfeeding

boolean optional

Adds 700 ml when true. Default false.

Example arguments

Verified

{
  "weight": 70,
  "age": 30,
  "caffeine_drinks": 2
}

curl -X POST https://api.findutils.com/api/tools/water-intake-calculator/execute \
  -H "Content-Type: application/json" \
  -d '{
    "weight": 70,
    "age": 30,
    "caffeine_drinks": 2
  }'

const response = await fetch('https://api.findutils.com/api/tools/water-intake-calculator/execute', {
  method: 'POST',
  headers: { 'Content-Type': 'application/json' },
  body: JSON.stringify({"weight":70,"age":30,"caffeine_drinks":2}),
});
const data = await response.json();

import requests

response = requests.post(
    "https://api.findutils.com/api/tools/water-intake-calculator/execute",
    json={"weight":70,"age":30,"caffeine_drinks":2},
)
data = response.json()

$ch = curl_init('https://api.findutils.com/api/tools/water-intake-calculator/execute');
curl_setopt_array($ch, [
    CURLOPT_POST => true,
    CURLOPT_HTTPHEADER => ['Content-Type: application/json'],
    CURLOPT_POSTFIELDS => '{"weight":70,"age":30,"caffeine_drinks":2}',
    CURLOPT_RETURNTRANSFER => true,
]);
$data = json_decode(curl_exec($ch), true);

Also an MCP tool

Call water_intake_calculator from Claude, Cursor or any MCP client. Same arguments, same output.

https://mcp.findutils.com

MCP reference

Rate limit: 60 a minute, per IP
Auth: None
REST id: water-intake-calculator
MCP name: water_intake_calculator
Category: Calculators
Machine-readable: openapi.json · markdown.md

Request body

Example arguments

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