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Percentage Calculator

Find X% of Y, percentage increase, decrease and difference between two values.

FreeNo loginBrowser basedPrivacy friendly
By MerQPrime Editorial TeamUpdated 2026-06-20Reviewed 2026-06-20Editorial policy
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Overview

About the Percentage Calculator

Solve everyday percentage problems in seconds. Find what X% of a number is, calculate percentage increase or decrease, or compare two values with percentage difference — no formulas needed.

Benefits

How it works

  1. 1Choose the calculation type: % of, increase, decrease or difference.
  2. 2Enter the required values (percent and base, or old and new values).
  3. 3See the result instantly with a clear explanation line.
  4. 4Copy or share your result for homework, invoices or reports.

Applications

Use cases

  • Calculate discounts and markups on products.
  • Measure growth or decline in sales or metrics.
  • Solve school and exam percentage problems.
  • Compare price changes between two amounts.

Support

Frequently asked questions

How do I find X% of Y?
Multiply Y by X and divide by 100. For example, 15% of 200 = 200 × 15 ÷ 100 = 30.
How is percentage increase calculated?
Percentage increase = ((New value − Old value) ÷ Old value) × 100. A positive result means growth; negative means decline.
What is percentage difference?
Percentage difference compares two values relative to their average: |A − B| ÷ ((A + B) ÷ 2) × 100. It shows how far apart two numbers are.

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Percentage Calculator (Instant & Free) | MerQPrime