{
  "slug": "coffee-ratio",
  "title": "Coffee Brew Ratio Calculator",
  "heading": "Coffee Ratio Calculator",
  "category": "other",
  "url": "https://www.revenuelab.fyi/toolbox/coffee-ratio",
  "summary": "Grams of coffee and water for any brew ratio and batch size.",
  "description": "Dial in a repeatable cup. Pick your brew ratio and the finished volume you want, and get the coffee dose, total brew water, and the extra water absorbed by the grounds.",
  "formula": "Coffee = water ÷ ratio. Grounds retain about 2 g water per gram of coffee.",
  "dateModified": "2026-09-30",
  "run_url": "https://www.revenuelab.fyi/api/public/calc?tool=coffee-ratio",
  "inputs": [
    {
      "id": "cups",
      "label": "Finished coffee",
      "kind": "number",
      "hint": null,
      "default": 500,
      "unit": "g (ml)",
      "min": 50,
      "max": null
    },
    {
      "id": "ratio",
      "label": "Water : coffee ratio",
      "kind": "number",
      "hint": null,
      "default": 16,
      "unit": null,
      "min": 8,
      "max": 20
    }
  ],
  "outputs": [
    {
      "id": "coffee",
      "label": "Coffee dose (g)",
      "format": "decimal",
      "hint": null,
      "primary": true
    },
    {
      "id": "water",
      "label": "Brew water (g)",
      "format": "decimal",
      "hint": null,
      "primary": false
    },
    {
      "id": "absorbed",
      "label": "Absorbed by grounds (g)",
      "format": "decimal",
      "hint": null,
      "primary": false
    },
    {
      "id": "tbsp",
      "label": "Approx. tablespoons",
      "format": "decimal",
      "hint": null,
      "primary": false
    }
  ],
  "worked_example": {
    "inputs": [
      "Finished coffee: 500 g (ml)",
      "Water : coffee ratio: 16"
    ],
    "outputs": [
      "Coffee dose (g): 35.7",
      "Brew water (g): 571",
      "Absorbed by grounds (g): 71",
      "Approx. tablespoons: 6.7"
    ]
  },
  "how_to": {
    "title": "How to use this",
    "steps": [
      "Enter finished coffee (g (ml)).",
      "Enter water : coffee ratio.",
      "Read your coffee dose (g) on the right — it updates as you type.",
      "Hit Share to keep the scenario or send it to someone."
    ]
  },
  "scenarios": [
    {
      "name": "Conservative",
      "description": "Lower-end numbers — what if things land soft?",
      "values": {
        "cups": 300,
        "ratio": 9.6
      }
    },
    {
      "name": "Typical",
      "description": "Defaults — the most common real-world setup.",
      "values": {
        "cups": 500,
        "ratio": 16
      }
    },
    {
      "name": "Ambitious",
      "description": "Higher-end numbers — what if things really pop?",
      "values": {
        "cups": 800,
        "ratio": 20
      }
    }
  ],
  "limitations": [
    "Estimates assume standard, average conditions — local rules, pricing, and materials vary.",
    "Results are rounded for readability; add a buffer before ordering, booking, or committing.",
    "Double-check anything with a real cost attached against a local quote."
  ],
  "faq": [
    {
      "q": "What ratio should I start with?",
      "a": "1:16 is the common pour-over starting point. Go lower (1:14) for a heavier cup, higher (1:17–18) for a lighter one."
    },
    {
      "q": "Why is brew water more than my cup size?",
      "a": "Wet grounds hold roughly twice their weight in water, so you always pour more than you pour out."
    }
  ],
  "related": [],
  "license": "CC-BY-4.0",
  "citation": "RevenueLab — Coffee Brew Ratio Calculator (https://www.revenuelab.fyi/toolbox/coffee-ratio)"
}