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Percentage Calculator

Calculate percentages, increases, decreases, and ratios instantly. Multiple calculation modes for all your percentage needs.

What is % of ?

is what % of ?

Increase by %

Decrease by %

From to = ?%

Result

Enter values to calculate

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Quick Examples

What is 20% of 100?

25 is what % of 200?

Increase 100 by 15%

Decrease 100 by 10%

Legal Disclaimer / Yasal Uyarı: This calculator provides mathematical calculations for reference purposes. Always verify important calculations independently. / Bu hesap makinesi referans amaçlı matematiksel hesaplamalar sağlar. Önemli hesaplamaları her zaman bağımsız olarak doğrulayın.

About Percentage Calculator

Our free Percentage Calculator helps you solve various percentage problems quickly and accurately. Whether you need to calculate a percentage of a number, find what percentage one number is of another, or calculate percentage increases and decreases, this tool has you covered.

How to Use

Select the calculation mode that matches your needs.
Enter the required values in the input fields.
Click Calculate to see the result.
The formula used for the calculation is displayed below the result.
Use Clear to reset all fields.
Click Copy to copy the result to your clipboard.

Calculation Modes

What is X% of Y? - Calculate a percentage of a number. Example: What is 20% of 100? = 20
X is what % of Y? - Find what percentage one number is of another. Example: 25 is what % of 200? = 12.5%
% Increase: Calculate the result after increasing a value by a percentage. Example: Increase 100 by 15% = 115
% Decrease: Calculate the result after decreasing a value by a percentage. Example: Decrease 100 by 10% = 90
% Change: Calculate the percentage change between two values. Example: From 50 to 75 = 50% increase

Frequently Asked Questions

How do I calculate a percentage?

To calculate X% of Y, multiply Y by X and divide by 100. Formula: (X × Y) ÷ 100. Our calculator does this automatically when you select "What is X% of Y?" mode.

How do I calculate percentage increase?

To increase a number by a percentage, multiply the number by (1 + percentage/100). Example: 100 increased by 20% = 100 × 1.20 = 120.

How do I calculate percentage decrease?

To decrease a number by a percentage, multiply the number by (1 - percentage/100). Example: 100 decreased by 20% = 100 × 0.80 = 80.

How do I find what percentage one number is of another?

Divide the first number by the second and multiply by 100. Formula: (X ÷ Y) × 100. Example: 25 is what % of 200? = (25 ÷ 200) × 100 = 12.5%.

Can I use this for financial calculations?

Yes, this calculator is useful for many financial calculations like discounts, taxes, tips, and interest rates. However, for important financial decisions, always verify with a financial professional.