✦ New Tool
Percentage Calculator Pro
Calculate percentages in four different modes: X% of Y, X is what % of Y, percentage change, and percentage difference.
Result
15% of 200 = 30
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Why Use a Percentage Calculator?
Percentages are everywhere — discounts, taxes, tips, statistics, grades, and financial calculations. A percentage calculator saves time and eliminates mental math errors by computing exact values instantly.
Whether you're figuring out a sale price, calculating investment returns, or analyzing data, having a reliable percentage calculator with multiple modes (X% of Y, percentage change, difference) ensures you always get accurate results.
Frequently Asked Questions
Use the first calculator mode. Enter the percentage (X) and the total value (Y), and we'll compute X% of Y instantly. For example, 15% of 200 = 30.
Use the 'Percentage Change' mode. Enter the original value and the new value. We'll calculate the increase or decrease as a percentage. For example, 50 to 75 is a 50% increase.
Use the 'X is what % of Y' mode. Enter X as the part and Y as the whole. The result shows X as a percentage of Y. For example, 30 is 15% of 200.
Yes, all calculations are performed with full JavaScript number precision. Results are rounded to 2 decimal places for readability, but the underlying calculation uses exact values.
No. All calculations happen locally in your browser. None of your numbers are sent to any server or stored anywhere.