Percentage Calculator
Three percentage modes in one tool: find X% of Y, find what percentage X is of Y, and calculate the percentage change between two values. Includes a copy button for fast sharing. Runs in your browser.
About Percentage Calculations
Three modes: find X% of Y, find what percentage X is of Y, or compute the percentage change between two values. For tips and splits use theTip Calculator, and for tax use the Tax Calculator.
Secure & Private Client-Side
This tool runs entirely in your browser. No data is sent to any server, ensuring your information remains private and secure.
About Percentage Calculator
Three percentage modes in one tool: find X% of Y, find what percentage X is of Y, and calculate the percentage change between two values. Includes a copy button for fast sharing. Runs in your browser.
Frequently Asked Questions
How is percentage change calculated? expand_more
Change is (new - old) / |old| * 100. A positive result is an increase, a negative result is a decrease.
What is the difference between percent of and percent change? expand_more
"X% of Y" multiplies a base by a percentage. "Percent change" compares two values to measure how much one grew or shrank relative to the other.
How do I calculate a discount? expand_more
Use "X% of Y" to find the discount amount, then subtract it from the original price. Or use [Tip Calculator](/tools/tip-calculator/) style tools for splits.
Can I calculate tax with this? expand_more
Yes, but the dedicated [Tax Calculator](/tools/tax-calculator/) handles inclusive and exclusive tax scenarios more directly.
Is my data uploaded? expand_more
No. Everything runs locally in your browser.
Common Use Cases
- Discounts: Calculate sale prices and final discounts at checkout.
- Exam Scores: Convert raw test scores into percentages.
- Growth & KPIs: Measure month-over-month change in metrics.
- Commission: Work out percentage-based payouts and fees.