{
  "slug": "weight-converter",
  "title": "Weight Converter",
  "heading": "Weight / Mass Converter",
  "category": "other",
  "url": "https://www.revenuelab.fyi/toolbox/weight-converter",
  "summary": "Pounds, kilograms, grams, ounces, stones.",
  "description": "Convert between the most common units of mass.",
  "formula": null,
  "dateModified": "2026-10-03",
  "run_url": "https://www.revenuelab.fyi/api/public/calc?tool=weight-converter",
  "inputs": [
    {
      "id": "value",
      "label": "Value",
      "kind": "number",
      "hint": null,
      "default": 150,
      "unit": null,
      "min": null,
      "max": null
    },
    {
      "id": "from",
      "label": "From",
      "kind": "select",
      "hint": null,
      "default": "lb",
      "options": [
        {
          "value": "mg",
          "label": "Milligrams"
        },
        {
          "value": "g",
          "label": "Grams"
        },
        {
          "value": "kg",
          "label": "Kilograms"
        },
        {
          "value": "oz",
          "label": "Ounces"
        },
        {
          "value": "lb",
          "label": "Pounds"
        },
        {
          "value": "st",
          "label": "Stones"
        }
      ]
    }
  ],
  "outputs": [
    {
      "id": "kg",
      "label": "Kilograms",
      "format": "decimal",
      "hint": null,
      "primary": true
    },
    {
      "id": "lb",
      "label": "Pounds",
      "format": "decimal",
      "hint": null,
      "primary": false
    },
    {
      "id": "g",
      "label": "Grams",
      "format": "decimal",
      "hint": null,
      "primary": false
    },
    {
      "id": "oz",
      "label": "Ounces",
      "format": "decimal",
      "hint": null,
      "primary": false
    },
    {
      "id": "st",
      "label": "Stones",
      "format": "decimal",
      "hint": null,
      "primary": false
    },
    {
      "id": "mg",
      "label": "Milligrams",
      "format": "decimal",
      "hint": null,
      "primary": false
    }
  ],
  "worked_example": {
    "inputs": [
      "Value: 150",
      "From: Pounds"
    ],
    "outputs": [
      "Kilograms: 68.0388",
      "Pounds: 150",
      "Grams: 68,038.8",
      "Ounces: 2,400",
      "Stones: 10.714",
      "Milligrams: 68,038,800"
    ]
  },
  "how_to": {
    "title": "How to use this",
    "steps": [
      "Enter value.",
      "Enter from.",
      "Read your kilograms 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": {
        "value": 90,
        "from": "lb"
      }
    },
    {
      "name": "Typical",
      "description": "Defaults — the most common real-world setup.",
      "values": {
        "value": 150,
        "from": "lb"
      }
    },
    {
      "name": "Ambitious",
      "description": "Higher-end numbers — what if things really pop?",
      "values": {
        "value": 240,
        "from": "lb"
      }
    }
  ],
  "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": "How does the weight / mass converter work?",
      "a": "Convert between the most common units of mass."
    },
    {
      "q": "What do I need to enter?",
      "a": "2 values: value, and from. Each field starts with a sensible default, so you can change one number at a time and watch the result move."
    },
    {
      "q": "What does the kilograms result mean?",
      "a": "It is returned as a decimal number and updates live as you edit the inputs, so you can compare two or three versions of a scenario in a few seconds."
    },
    {
      "q": "Is this calculator free, and do I need an account?",
      "a": "Yes, it's free, and no account is required. Nothing you type is stored on our servers — the maths runs entirely in your browser."
    },
    {
      "q": "How accurate is the result?",
      "a": "It applies the standard formula exactly, so the arithmetic is precise. Estimates assume standard, average conditions — local rules, pricing, and materials vary."
    },
    {
      "q": "Who is this tool for?",
      "a": "It's built for anyone doing everyday planning maths — a quick estimate that would otherwise need four browser tabs and a calculator app."
    }
  ],
  "related": [
    "https://www.revenuelab.fyi/toolbox/length-converter",
    "https://www.revenuelab.fyi/toolbox/temperature-converter"
  ],
  "license": "CC-BY-4.0",
  "citation": "RevenueLab — Weight Converter (https://www.revenuelab.fyi/toolbox/weight-converter)"
}