Percentage Calculator

Calculate percentages, percent change, discounts, and tax additions instantly. Simple, free, and accurate online percentage calculator.

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Percentage Calculator — All Modes

The Percentage Calculator from SarkariTool covers every common percentage calculation you'll need. Whether you're calculating a discount, finding out what percentage one number is of another, or looking at growth rates — this tool handles it instantly.

Four Calculation Modes

  1. Basic — Find X% of Y. Example: "What is 25% of 200?" Answer: 50.
  2. Reverse — X is what % of Y? Example: "45 is what % of 180?" Answer: 25%.
  3. % Change — Calculate percentage increase or decrease between two values. Perfect for tracking growth, inflation, or price changes.
  4. Add/Remove % — Add tax (like GST) to a price or calculate a discount. Select plus or minus, enter the percentage, and get the result.

Common Use Cases

  • Shopping Discounts — Quickly calculate final price after a percentage discount.
  • Tax Calculation — Add GST, VAT, or any tax rate to a base price.
  • Exam Marks — Convert marks to percentage or find out what percentage you scored.
  • Business — Calculate profit margins, revenue growth, and cost changes.

Privacy

All calculations happen in your browser. No data is sent to any server or stored anywhere.

Frequently Asked Questions

How do I calculate a percentage of a number?
Use the 'Basic' tab. Enter the percentage and the number. For example, to find 20% of 150: enter 20 in the first field and 150 in the second. Result: 30.

How do I calculate percentage increase or decrease?
Use the '% Change' tab. Enter the original value in 'From' and the new value in 'To'. The calculator shows the percentage change and whether it's an increase or decrease.

What is the formula for percentage?
To find X% of Y: (X / 100) × Y. To find what % X is of Y: (X / Y) × 100. For percentage change: ((New – Old) / Old) × 100.

How do I calculate a discount?
Use the 'Add/Remove %' tab. Enter the original price, select 'minus (−)', and enter the discount percentage. The result is the final discounted price.

Can I add tax or GST using this tool?
Yes. Use the 'Add/Remove %' tab. Enter the base amount, select 'plus (+)', and enter the tax rate (e.g., 18 for 18% GST). The result is the amount including tax.

What does 'X is what % of Y' mean?
This is a reverse percentage calculation. For example, '30 is what % of 150?' gives you 20%. Use the 'Reverse' tab for this.

Is this calculator free to use?
Yes, it is 100% free and works instantly in your browser without any signup. No data is sent to any server.