Percentage Calculator
Calculate percentages, increases and decreases easily.
100% Private & Client-Side Execution
All percentage calculations are performed locally in your browser.
About Percentage Calculator
Percentage Calculator solves everyday financial and mathematical percentage questions with dedicated calculation cards for proportion, growth, and discount rates.
How to Use Percentage Calculator
- Select the calculation type: "What is X% of Y?", "X is what % of Y?", or "% Increase/Decrease from X to Y".
- Fill in the two numeric values.
- The result updates immediately with positive/negative indicators.
- Click the Copy button next to any result to use it elsewhere.
Common Real-World Use Cases
- Shoppers & Retailers: Calculate final checkout prices after sales promotions and clearance discounts.
- Financial Analysts: Compute quarter-over-quarter revenue growth and profit margin fluctuations.
- Students: Determine test score percentages and grade averages.
Technical Specifications & Limitations
Safely guards against zero denominators and handles positive, negative, and decimal values.
Frequently Asked Questions
- How is percentage increase calculated?
- Percentage increase is computed as ((New Value - Old Value) / |Old Value|) * 100%.
- Does it support negative numbers?
- Yes, calculations accurately compute drops and negative baseline adjustments.