Percentage Calculator
X% of Y, what % is X of Y, % change and more
About Percentage Calculator
Percentage calculations are needed everywhere — from calculating discounts and tax to measuring growth rates and exam scores. This free online Percentage Calculator handles three common calculation types: finding X% of a number, calculating what percentage one number is of another, and computing the percentage change between two values. Instant results, no formulas needed.
How to Use Percentage Calculator
- 1Choose the calculation type: "X% of Y", "X is what % of Y", or "% change from X to Y".
- 2Enter the numbers in the input fields.
- 3The result calculates automatically as you type.
- 4Use the "Reset" button to clear all fields for a new calculation.
Common Use Cases
To find a percentage increase: ((New Value - Old Value) / Old Value) × 100. This Percentage Calculator handles that automatically in "% change" mode.
⭐ Popular Free Tools
Frequently Asked Questions
How do I calculate GST in India?
To calculate GST: Multiply the original price by the GST rate and divide by 100. For example, ₹1,000 item at 18% GST: Tax = ₹1,000 × 18/100 = ₹180. Total price = ₹1,180. To find the price excluding GST from an inclusive price: Price ex-GST = Total / (1 + GST rate/100).
How do I calculate percentage of marks?
Percentage of marks = (Marks obtained / Total marks) × 100. For example, if you scored 450 out of 600, your percentage is (450/600) × 100 = 75%.
What is the formula for percentage increase?
Percentage increase = ((New Value - Old Value) / Old Value) × 100. If a price increased from ₹500 to ₹600: Increase = ((600-500)/500) × 100 = 20% increase.
How do I find what percentage one number is of another?
Formula: (Part / Whole) × 100. If 30 students passed out of 120: (30/120) × 100 = 25%. This means 25% of students passed.