Percentage Calculator
Free percentage calculator with 4 calculation modes. Calculate what is X% of Y, percentage increase/decrease, and more. Instant results with step-by-step explanations.
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How to Use
- 1 Choose your calculation mode — Select from 4 tabs: 'What is %', 'Is what %', '% Change', or 'Add/-/%' depending on what you need to calculate.
- 2 Enter your values — Input the numbers for your calculation. Each mode has different fields: percentages, values, or both.
- 3 View instant results — See the calculated result immediately with the formula shown below for transparency.
- 4 Review the explanation — Understand how the calculation works with step-by-step breakdown of the formula.
- 5 Copy the result — Click the copy button to copy the result to your clipboard for use in spreadsheets or documents.
Frequently Asked Questions
How do you calculate a percentage?
To find X% of Y, divide X by 100 and multiply by Y. For example, 15% of 200 = (15 ÷ 100) × 200 = 30. Our calculator does this instantly for you.
How do you calculate percentage increase?
Percentage increase = ((New Value - Original Value) / Original Value) × 100. For example, from $100 to $120: ((120 - 100) / 100) × 100 = 20% increase.
What's the formula for percentage change?
Percentage Change = ((New Value - Original Value) / Original Value) × 100. Positive results show increase (↑), negative show decrease (↓). The calculator shows both the percentage and absolute change.
How to calculate percentage of a number?
Use the 'What is X% of Y?' mode. Enter the percentage and the number, and the calculator instantly shows the result. For example, 25% of 80 = 20.