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Free Online Tool

Percentage Calculator

Instantly calculate percentages, increases, discounts and differences. A practical percentage calculator for shopping, finance, education and business.

4 Calculation ModesInstant ResultsFormula DisplayFree
Find PercentageWhat is Y% of X?
Percent IncreaseAdd percentage to value
Percent DecreaseSubtract percentage
Percent DiffDifference between two numbers
01
Step by step guide

How to Calculate Percentages?

You can calculate percentages in 4 different modes.

1

Select calculation mode

Choose from find percentage, find ratio, increase/decrease or difference modes.

2

Enter values

Enter the number and percentage values for your selected mode.

3

View results

Click Calculate. Result and formula are shown instantly.

Tips

  • Use Increase/Decrease mode to calculate shopping discounts.
  • Use Percentage Increase mode to calculate salary raises.
  • Use Percentage Difference mode to compare inflation rates.

Important Notes

  • Percent increase and decrease are not symmetric: +50% then -50% = 75% of original.
  • In compound percentage calculations, each step applies to the previous result.
  • Small rounding differences may occur with small numbers.
02
Useful tools

Related online tools

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Frequently asked questions

Percentage Calculator — FAQ

How is a percentage calculated?

To find the percentage of a number, multiply the number by the percentage and divide by 100. Formula: Result = Number × (Percentage / 100).

What is 15% of 200?

200 × (15/100) = 200 × 0.15 = 30. So 15% of 200 is 30.

How to calculate percentage increase?

New Value = Old Value × (1 + Percentage/100). Example: 20% increase on 1,000: 1,000 × 1.20 = 1,200.

How to calculate percentage decrease?

New Value = Old Value × (1 - Percentage/100). Example: 30% off 500: 500 × 0.70 = 350.

How to find percentage difference?

Percentage Difference = ((New - Old) / Old) × 100. Example: 80 to 100: ((100-80)/80) × 100 = 25% increase.

What percentage of 120 is 30?

(30/120) × 100 = 25%. So 30 is 25% of 120.

Is this tool free?

Yes. Our percentage calculator is completely free to use.

What is compound percentage?

Compound percentage applies each step to the previous result. Example: +10% + +10% = 21% total (1.10 × 1.10 = 1.21).

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