Percentage Calculator
%
£
£
–
Result
Percentage Calculation

Your percentage result calculated instantly with step-by-step breakdown and Excel formula.

Step-by-Step Solution

    =A1*B1%
    Copy this formula into Excel/Google Sheets. Replace A1, B1 with your cell references.

    What is a Percentage Calculator?

    A percentage calculator is a versatile math tool that helps you compute percentages for various real-world scenarios: marks percentage for exams, money calculations for shopping or business, percentage increase/decrease for growth tracking, profit percentage for commerce, and percentage difference for comparisons.

    Whether you're a student calculating GCSE grades, a professional analyzing financial data in Excel, or someone comparing prices, this free percentage calculator delivers instant, accurate results with step-by-step explanations and Excel-ready formulas.

    Percentage Formulas Explained

    Each calculation type uses a specific formula. Here are the core percentage formulas implemented in this tool:

    % of a Number:Result = (Percentage ÷ 100) × NumberExample: 20% of 150 = (20 ÷ 100) × 150 = 0.2 × 150 = 30

    Excel: =A1*B1% where A1=percentage, B1=number

    Marks Percentage:Percentage = (Obtained Marks ÷ Total Marks) × 100Example: 450/500 = (450 ÷ 500) × 100 = 90%

    UK GCSE: 90% = Grade 9 (highest), 70-79% = Grade 7 (A), etc.

    Percentage Increase/Decrease:% Change = [(New − Original) ÷ Original] × 100Positive = increase, Negative = decreaseExample: £80 → £100 = [(100−80)÷80]×100 = +25%

    Excel: =(B1-A1)/A1 then format as Percentage

    Percentage Difference:% Diff = [|Value1 − Value2| ÷ ((Value1+Value2)÷2)] × 100Measures relative difference between two values

    Useful for comparing prices, scores, or measurements without direction

    Profit Percentage:Profit % = [(Selling Price − Cost Price) ÷ Cost Price] × 100Example: Buy £50, Sell £75 → [(75−50)÷50]×100 = 50% profit

    Negative result indicates a loss percentage

    How to Use This Percentage Calculator

    Select Your Calculation Type

    Choose from 6 modes: % of Number, Marks %, Increase/Decrease, % Difference, Profit %, or Find %. Each mode shows relevant input fields.

    Enter Your Values

    Input your numbers in the fields. For marks, enter obtained and total marks. For money, use £ symbol (optional). All fields validate for correct number format.

    Get Instant Results

    Click Calculate to see your result instantly, with step-by-step breakdown, Excel formula, and (for marks) UK grade classification if selected.

    Copy, Share, or Reset

    Copy your result to clipboard, share via link, or reset to start a new calculation. Results save locally for quick reference.

    Using Percentages in Excel

    This calculator provides Excel-ready formulas for each calculation type. Here's how to use them:

    • % of number: =A1*B1% — Multiply number by percentage
    • Marks %: =A1/B1*100 — Divide obtained by total, multiply by 100
    • % change: =(B1-A1)/A1 — Format cell as Percentage
    • Profit %: =(B1-A1)/A1*100 — Selling price minus cost, divided by cost

    Tip: In Excel, select cells → Right-click → Format Cells → Percentage to display results with % symbol automatically.

    UK Grade Conversion (GCSE & A-Level)

    When calculating marks percentage, you can select a UK grading system for instant grade classification:

    GCSE (9-1)PercentageA-Level
    Grade 9≥ 90%A*
    Grade 880–89%A
    Grade 770–79%B
    Grade 660–69%C
    Grade 550–59%D
    Grade 440–49%E (Pass)
    Grade 1-3< 40%U (Unclassified)

    Note: Grade boundaries vary by subject and exam board. Use this as a general guide and confirm with your school or exam board.

    FAQ

    Frequently Asked Questions About Percentage Calculators

    Common questions about percentage calculations, formulas, and Excel usage.

    Use the formula: (Percentage ÷ 100) × Number. Example: 20% of 150 = (20 ÷ 100) × 150 = 0.2 × 150 = 30. This calculator does it instantly with step-by-step breakdown.
    Percentage = (Obtained Marks ÷ Total Marks) × 100. Example: If you scored 450 out of 500, percentage = (450 ÷ 500) × 100 = 90%. This calculator supports UK grading systems and multiple subjects.
    Percentage Increase = [(New Value − Original Value) ÷ Original Value] × 100. Example: Price increased from £80 to £100 → [(100−80)÷80]×100 = 25% increase. Use our percentage increase calculator for instant results.
    In Excel, use formulas like: =A1*B1% for percentage of number, =(B1-A1)/A1 for percentage change, or =A1/B1 for percentage of total. Format cells as Percentage. This calculator shows Excel-ready formulas for each calculation.
    Yes. This percentage calculator supports UK grading systems including GCSE, A-Level, and university classifications. Enter your marks and total to get your percentage and corresponding grade band instantly.
    Profit Percentage = [(Selling Price − Cost Price) ÷ Cost Price] × 100. Example: Buy at £50, sell at £75 → [(75−50)÷50]×100 = 50% profit. Use our profit percentage calculator for business calculations.
    About the Developer

    Created & Developed by Bilal Khan — Software Engineer

    This Percentage Calculator was built by Bilal Khan, a professional Software Engineer specialising in math and educational web tools. All formulas implemented here are verified against standard mathematical references and educational guidelines. Bilal built CalculatorSoup to provide free, accurate, and accessible tools for everyone — no registration, no advertisements, no cost.

    Connect with Bilal on LinkedIn
    Explore More

    100+ Free Calculators — All in One Place

    From math and education to finance and health, CalculatorSoup has every tool you need.

    🎂 Age Calculator 📝 Grade Calculator 🎓 GPA Calculator ➗ Fraction Calculator 🧮 CalculatorSoup.site ⚡ View All 100+ Tools →