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Free Percentage Calculator Online
Calculate percentages, discounts, increases, decreases, and percentage changes.
20% of 100 is
20.00
Privacy: All processing is done client-side; nothing you type or generate is sent to any server.
Monetization: We show light, non-intrusive ads to keep these tools free for everyone.
How It Works
- Choose calculation type
- Enter your numbers
- View instant percentage results
- See formulas and explanations
When to Use This Tool
- ✓Calculating sale discounts
- ✓Finding percentage changes
- ✓Determining markup percentages
- ✓Grade and score calculations
Use Cases & Examples
- •Black Friday discount calculations
- •Stock price change percentages
- •Test score percentages
- •Tip and tax calculations
Frequently Asked Questions
How do I calculate percentage off?
Enter original price and discount percentage to see final price and savings amount.
Can it calculate percentage increase?
Yes, enter original and new values to see percentage increase or decrease.
What about reverse percentages?
Calculate the original price before discount or find what percentage one number is of another.