AIAZHHow To Use
- Select the calculation mode: "% of", "Increase/Decrease", or "Difference".
- Enter the required values based on the selected mode.
- Click "Calculate" to see the percentage result instantly.
- Switch between modes for different types of percentage calculations.
- Use the results for financial analysis, shopping comparisons, or data reporting.
Frequently Asked Questions
How do I calculate what percent one number is of another?
Divide the part by the whole and multiply by 100. For example, 30 out of 50 = (30 ÷ 50) × 100 = 60%. Our "% of" mode does this instantly.
How do I calculate percentage increase?
Percentage increase = ((New Value - Old Value) ÷ Old Value) × 100. For example, if a value goes from 50 to 75, the increase is ((75 - 50) ÷ 50) × 100 = 50%.
What is percentage difference?
Percentage difference measures the relative difference between two values: |(V1 - V2)| ÷ ((V1 + V2) ÷ 2) × 100. It treats both values symmetrically, unlike percentage change which has a reference point.
How do I increase a number by a percentage?
Multiply the number by (1 + percentage/100). For example, 200 increased by 15% = 200 × 1.15 = 230.
Is my data stored or shared?
No. All calculations are performed locally in your browser. Your numbers never leave your device.
Can I use this for financial calculations?
Yes. The percentage calculator is suitable for financial analysis, investment returns, sales tax, tips, discounts, grade calculations, and any scenario requiring percentage math.
Multiple Percentage Modes
Calculate what percent one number is of another, increase or decrease a number by a percentage, or find the percentage difference between two numbers.
Instant Results
Get instant percentage calculations with no waiting. Perfect for quick math when shopping, analyzing data, or working with financial figures.
100% Private & Secure
Your data never leaves your device. All percentage calculations happen locally in your browser with JavaScript.
Free & No Signup
No account required, no email needed. Use the percentage calculator unlimited times for any purpose.
Your All-in-One Percentage Calculator
Our free percentage calculator handles three essential calculations: finding what percent one number is of another, increasing or decreasing a number by a percentage, and calculating the percentage difference between two values. Whether you are a student, professional, or casual user, this tool simplifies percentage math.
Percentage Calculations for Everyday Life
Percentages appear everywhere: sales discounts, tax rates, investment returns, grade scores, statistical data, and tip calculations. Understanding percentage math helps you make better financial decisions. Our calculator handles all common percentage scenarios with instant accuracy.
Business and Financial Percentage Analysis
Professionals can use this calculator for financial analysis, KPI tracking, growth rate calculations, market share analysis, and budget planning. Percentage change calculations help quantify performance improvements and identify trends in business data.
Understanding the Difference Between Percentage Change and Difference
Percentage change measures change relative to a starting value (reference dependent). Percentage difference measures relative difference between two values symmetrically (no reference). Use percentage change for growth rates and percentage difference for comparing two independent values.