{
  "id": 42,
  "slug": "percentage-calculator",
  "type": "tool",
  "title": "Percentage Calculator — Free Online",
  "summary": "Work out percentages: X% of Y, what percent X is of Y, and percentage change. 100% in your browser — free, no sign-up.",
  "category_slug": "calc",
  "category_name": "Calculators",
  "locale": "en",
  "seo": {
    "description": "Free online percentage calculator. Find X% of Y, what percent one number is of another, and percentage increase or decrease. In your browser, private, no sign-up."
  },
  "data": {
    "howto": [
      {
        "step": 1,
        "text": "Choose the calculation type."
      },
      {
        "step": 2,
        "text": "Enter the two numbers."
      },
      {
        "step": 3,
        "text": "Read the result instantly."
      }
    ],
    "sections": [
      {
        "body": "Three of the most common percentage questions: what is X% of Y, X is what percent of Y, and the percentage change from one number to another. Pick the mode and enter two numbers.",
        "heading": "What can it calculate?"
      },
      {
        "body": "All three formulas run in your browser as you type, so you get the answer instantly with no rounding surprises. Nothing is sent anywhere.",
        "heading": "How it works"
      },
      {
        "body": "Calculate a discount or tip, work out a tax or markup, find a test score as a percentage, compare two figures, or measure growth and decline between two values.",
        "heading": "When to use it"
      },
      {
        "body": "Percentage change is the difference between two values relative to the first: (new − old) ÷ old × 100. A positive result is an increase, a negative one is a decrease — useful for prices, metrics, and results over time.",
        "heading": "Percentage change explained"
      }
    ],
    "toolKind": "client",
    "clientApp": "percent-calc"
  },
  "updated_at": "2026-06-27T12:11:17.771Z",
  "faq": [
    {
      "q": "What calculations does it support?",
      "a": "Three: what is X% of Y, X is what percent of Y, and the percentage change from one number to another."
    },
    {
      "q": "How is percentage change calculated?",
      "a": "As (new − old) ÷ old × 100. A positive result is an increase, a negative one a decrease."
    },
    {
      "q": "Is my data sent anywhere?",
      "a": "No. Everything is computed in your browser as you type."
    },
    {
      "q": "Can I use it for discounts and tips?",
      "a": "Yes. Use \"X% of Y\" for a discount or tip amount, and percentage change to compare prices."
    },
    {
      "q": "Is it free?",
      "a": "Yes, completely free — no sign-up and no watermark."
    },
    {
      "q": "Is my data private?",
      "a": "Yes — this tool runs entirely in your browser. Your files and text are never uploaded."
    }
  ],
  "related": [
    {
      "slug": "loan-calculator",
      "title": "Loan & Mortgage Calculator — Free",
      "type": "tool",
      "category_slug": "calc",
      "kind": "related",
      "data": {
        "howto": [
          {
            "step": 1,
            "text": "Enter the loan amount, annual interest rate, and term in years."
          },
          {
            "step": 2,
            "text": "Read the monthly payment, total repaid, and total interest."
          },
          {
            "step": 3,
            "text": "Adjust the numbers to compare scenarios."
          }
        ],
        "sections": [
          {
            "body": "From a loan amount, annual interest rate, and term in years, it works out your fixed monthly payment, the total you will repay over the life of the loan, and how much of that is interest.",
            "heading": "What does it calculate?"
          },
          {
            "body": "It uses the standard amortization formula — the same maths banks use for fixed-rate loans and mortgages — and computes everything in your browser as you type. Nothing is sent anywhere.",
            "heading": "How it works"
          },
          {
            "body": "Estimate a mortgage or car loan payment before applying, compare loan offers with different rates or terms, see how much interest a loan really costs, or check what term keeps payments affordable.",
            "heading": "When to use it"
          },
          {
            "body": "This is an estimate of principal and interest only. Real payments may also include property taxes, insurance, fees, or variable rates, so treat the figure as a guide and confirm with the lender.",
            "heading": "What it does not include"
          }
        ],
        "toolKind": "client",
        "clientApp": "loan-calc"
      }
    },
    {
      "slug": "bmi-calculator",
      "title": "BMI Calculator — Free, Metric & Imperial",
      "type": "tool",
      "category_slug": "calc",
      "kind": "related",
      "data": {
        "howto": [
          {
            "step": 1,
            "text": "Pick metric or imperial units."
          },
          {
            "step": 2,
            "text": "Enter your weight and height."
          },
          {
            "step": 3,
            "text": "Read your BMI and category."
          }
        ],
        "sections": [
          {
            "body": "Body Mass Index (BMI) is a number calculated from your weight and height that gives a general indication of whether you are underweight, a normal weight, overweight, or obese. It is a quick screening guide used widely in health contexts.",
            "heading": "What is BMI?"
          },
          {
            "body": "Enter your weight and height in metric (kg, cm) or imperial (lb, in). BMI is computed in your browser using the standard formula and matched to the standard category ranges. Nothing is sent anywhere.",
            "heading": "How it works"
          },
          {
            "body": "The usual ranges are: under 18.5 underweight, 18.5–24.9 normal weight, 25–29.9 overweight, and 30 or above obese. They apply to adults and are a general guide, not a personal diagnosis.",
            "heading": "BMI categories"
          },
          {
            "body": "BMI does not distinguish muscle from fat or account for age, sex, or body composition, so very muscular people can read as overweight. Treat it as a starting point and consult a professional for a real assessment.",
            "heading": "Limits of BMI"
          }
        ],
        "toolKind": "client",
        "clientApp": "bmi-calc"
      }
    },
    {
      "slug": "age-calculator",
      "title": "Age Calculator — Free, Exact Age",
      "type": "tool",
      "category_slug": "calc",
      "kind": "related",
      "data": {
        "howto": [
          {
            "step": 1,
            "text": "Enter your date of birth."
          },
          {
            "step": 2,
            "text": "Optionally set a date to calculate the age at (defaults to today)."
          },
          {
            "step": 3,
            "text": "Read your exact age in years, months, and days."
          }
        ],
        "sections": [
          {
            "body": "It works out exactly how old you are — in years, months, and days — from your date of birth, and also shows the total number of days and weeks you have lived. You can calculate age as of today or any other date.",
            "heading": "What does the age calculator do?"
          },
          {
            "body": "Enter your date of birth (and optionally a target date). The calculation runs entirely in your browser, accounting for different month lengths and leap years, so the result is exact rather than a rough estimate.",
            "heading": "How it works"
          },
          {
            "body": "Find your precise age for a form or application, work out someone's age on a specific date, count down to a milestone birthday, or figure out an age gap. It is also handy for eligibility checks that depend on an exact age.",
            "heading": "When to use it"
          },
          {
            "body": "A year is not always 365 days and months vary in length, so subtracting years alone is inaccurate. This tool counts the real calendar difference, including leap days, to give an exact years/months/days breakdown.",
            "heading": "Why the result is exact"
          }
        ],
        "toolKind": "client",
        "clientApp": "age-calc"
      }
    }
  ]
}