Water Intake Calculator

Calculators REST API MCP

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.

This page documents the MCP tool findutils:water_intake_calculator. See the REST reference →

Use in the browser View as Markdown

Call it over MCP

Tool name findutils:water_intake_calculator · no API keys · 120 requests/min per IP

Claude Code

claude mcp add findutils --transport http https://mcp.findutils.com/

Claude Desktop — claude_desktop_config.json

{
  "mcpServers": {
    "findutils": {
      "url": "https://mcp.findutils.com/"
    }
  }
}

Raw JSON-RPC (any MCP client) — verified example

curl -X POST https://mcp.findutils.com/ \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "tools/call",
    "params": {
      "name": "water_intake_calculator",
      "arguments": {
        "weight": 70,
        "age": 30,
        "caffeine_drinks": 2
      }
    }
  }'

Input schema

Argument	Type	Required	Description
weight	number	yes	Body weight in kg (metric) or lbs (imperial).
age	integer	yes	Age in years (1-120). Under 18 adds 10%, over 55 removes 5%.
unit_system	string (metric \| imperial)	no	Unit system for weight. Default: "metric".
activity_level	string (sedentary \| light \| moderate \| active \| very_active)	no	Activity multiplier: sedentary 1.0, light 1.1, moderate 1.2, active 1.35, very_active 1.5. Default: "moderate".
climate	string (cold \| moderate \| hot \| very_hot)	no	Climate multiplier: cold 0.95, moderate 1.0, hot 1.15, very_hot 1.3. Default: "moderate".
caffeine_drinks	integer	no	Caffeinated drinks per day (0-20). Each adds 350 ml. Default: 0.
pregnant	boolean	no	Adds 300 ml when true. Default: false.
breastfeeding	boolean	no	Adds 700 ml when true. Default: false.

Example arguments (verified)

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

Also a REST endpoint

The same tool answers plain HTTP at POST /api/tools/water-intake-calculator/execute — no key, 60 requests/min.

Open the REST reference for Water Intake Calculator →

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