Percentage Calculator

Calculate percentages instantly

Multiple calculation types available

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All calculations are performed locally in your browser. No data is stored or uploaded.

Formula Reference

  • What is X% of Y? = (X / 100) x Y
  • X is what % of Y? = (X / Y) x 100
  • Percentage Change = ((New - Original) / Original) x 100
  • Increase by % = Value + (Value x Percentage / 100)
  • Decrease by % = Value - (Value x Percentage / 100)

What is a Percentage?

A percentage is a number expressed as a fraction of 100. It's used to express how large or small one quantity is relative to another.

How to Use

1

Select calculation type

Choose from 5 different percentage calculations

2

Enter values

Enter the required values for the calculation

3

View result

Click Calculate to see the result instantly

Why Use This Calculator?

Multiple calculations

5 different percentage calculations in one tool

Instant results

Get results immediately

No signup

No signup required

Offline

Works offline

Frequently Asked Questions

Multiply the number by the percentage divided by 100. For example, 20% of 50 = 50 × (20/100) = 10.
Subtract the old value from the new value, divide by the old value, and multiply by 100.
Increase adds the percentage to the original, decrease subtracts it. For example, 100 increased by 20% = 120, decreased by 20% = 80.