{
  "slug": "engagement-rate",
  "title": "Engagement Rate Calculator",
  "heading": "Engagement Rate Calculator",
  "category": "other",
  "url": "https://www.revenuelab.fyi/toolbox/engagement-rate",
  "summary": "Engagement rate by followers and by reach, on any platform.",
  "description": "Brands price sponsorships off engagement rate, but they rarely agree on the denominator. Rate by reach is the honest one: it tells you how many people who actually saw the post did something about it.",
  "formula": "ER by followers = (Likes + Comments + Saves + Shares) ÷ Followers × 100.",
  "dateModified": "2026-09-30",
  "run_url": "https://www.revenuelab.fyi/api/public/calc?tool=engagement-rate",
  "inputs": [
    {
      "id": "followers",
      "label": "Followers",
      "kind": "number",
      "hint": null,
      "default": 25000,
      "unit": null,
      "min": 0,
      "max": null
    },
    {
      "id": "reach",
      "label": "Reach per post",
      "kind": "number",
      "hint": null,
      "default": 9000,
      "unit": null,
      "min": 0,
      "max": null
    },
    {
      "id": "likes",
      "label": "Likes",
      "kind": "number",
      "hint": null,
      "default": 850,
      "unit": null,
      "min": 0,
      "max": null
    },
    {
      "id": "comments",
      "label": "Comments",
      "kind": "number",
      "hint": null,
      "default": 42,
      "unit": null,
      "min": 0,
      "max": null
    },
    {
      "id": "saves",
      "label": "Saves + shares",
      "kind": "number",
      "hint": null,
      "default": 120,
      "unit": null,
      "min": 0,
      "max": null
    }
  ],
  "outputs": [
    {
      "id": "erFollowers",
      "label": "Engagement rate (followers)",
      "format": "percent",
      "hint": null,
      "primary": true
    },
    {
      "id": "erReach",
      "label": "Engagement rate (reach)",
      "format": "percent",
      "hint": null,
      "primary": false
    },
    {
      "id": "inter",
      "label": "Total interactions",
      "format": "number",
      "hint": null,
      "primary": false
    },
    {
      "id": "reachRate",
      "label": "Reach rate",
      "format": "percent",
      "hint": null,
      "primary": false
    },
    {
      "id": "commentRatio",
      "label": "Comments share of engagement",
      "format": "percent",
      "hint": null,
      "primary": false
    }
  ],
  "worked_example": {
    "inputs": [
      "Followers: 25000",
      "Reach per post: 9000",
      "Likes: 850",
      "Comments: 42",
      "Saves + shares: 120"
    ],
    "outputs": [
      "Engagement rate (followers): 4.05%",
      "Engagement rate (reach): 11.24%",
      "Total interactions: 1,012",
      "Reach rate: 36.0%",
      "Comments share of engagement: 4.2%"
    ]
  },
  "how_to": {
    "title": "How to use this",
    "steps": [
      "Enter followers.",
      "Enter reach per post.",
      "Enter likes.",
      "Enter comments.",
      "Enter saves + shares.",
      "Read your engagement rate (followers) 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": {
        "followers": 15000,
        "reach": 5400,
        "likes": 510,
        "comments": 25,
        "saves": 72
      }
    },
    {
      "name": "Typical",
      "description": "Defaults — the most common real-world setup.",
      "values": {
        "followers": 25000,
        "reach": 9000,
        "likes": 850,
        "comments": 42,
        "saves": 120
      }
    },
    {
      "name": "Ambitious",
      "description": "Higher-end numbers — what if things really pop?",
      "values": {
        "followers": 40000,
        "reach": 14400,
        "likes": 1360,
        "comments": 67,
        "saves": 192
      }
    }
  ],
  "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 engagement rate calculator work?",
      "a": "Brands price sponsorships off engagement rate, but they rarely agree on the denominator. Rate by reach is the honest one: it tells you how many people who actually saw the post did something about it. The underlying maths is: ER by followers = (Likes + Comments + Saves + Shares) ÷ Followers × 100."
    },
    {
      "q": "What do I need to enter?",
      "a": "5 values: followers, reach per post, likes, comments, and saves + shares. 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 engagement rate (followers) result mean?",
      "a": "It is returned as a percentage 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/sponsorship-rate-card",
    "https://www.revenuelab.fyi/toolbox/cost-per-engagement"
  ],
  "license": "CC-BY-4.0",
  "citation": "RevenueLab — Engagement Rate Calculator (https://www.revenuelab.fyi/toolbox/engagement-rate)"
}