Percentage Calculator
Your free online tool for fast and accurate percentage calculations. From simple discounts to complex growth rates, we've got you covered.
What is X% of Y?
X is what percent of Y?
Percentage Change
Value after % Change
Find Original Value (Reverse %)
Fast, Free, Private Percentage Calculator
Instantly solve any percent problem: What is X% of Y, what percent is X of Y, percentage increase/decrease, value after change, and reverse percentage. Top, Fast, Best and Lifetime Free Unlimited your information is 100% confidential and secure (processing happens locally in your browser).
Why people love this percentage calculator
All common percent tasks
X% of Y, X as % of Y, increase/decrease, after-change value, reverse percentage.
Instant, accurate results
Clear formulas and precise outputs in milliseconds.
Private by design
No signups, no uploads, no tracking. Everything runs locally on your device.
Works worldwide
Great for discounts, tips, VAT/GST, grades, profit, ROI, and taxes in any country.
Free & unlimited
Lifetime free no paywalls or limits. Use it as much as you need.
Mobile friendly
Optimized for Chrome, Edge, Firefox, and Safari on desktop and mobile.
Popular uses worldwide
Shopping discounts
Quickly find 10%, 20%, 30% off and final price after multiple discounts.
Sales tax (VAT/GST)
Add or remove VAT/GST to prices for USA state tax, UK VAT, EU VAT, India GST, AU GST, and more.
Tips & service charges
Calculate 10–25% tips and split bills easily for restaurants, deliveries, and ride shares.
Grades & scores
Convert marks to percentages for schools and exams (USA, UK, India, Canada, Australia).
Finance & business
ROI, profit margin, markup, growth rates, KPI changes, and price increases.
Health & stats
Percentage changes for weight, steps, metrics, and survey results.
Note: Check your local rates and rules for taxes and rounding.
How to calculate percentages (formulas)
- What is X% of Y: result = (X/100) × Y
- X is what percent of Y: percent = (X ÷ Y) × 100
- Percentage change: change% = ((Final − Initial) ÷ |Initial|) × 100
- Value after change: new = Initial × (1 ± percent/100)
- Reverse percentage (find original): original = Final ÷ (1 ± percent/100)
Global availability (GEO)
Built for users in the USA, UK, Canada, Australia, India, and across the EU (Germany, France, Spain, Italy, Netherlands), Middle East (UAE, Saudi Arabia), Asia (Singapore, Malaysia, Philippines, Indonesia, Japan, South Korea), Africa (Nigeria, South Africa, Egypt), and Latin America (Brazil, Mexico, Argentina). If your browser works, our percentage calculator works.
Frequently Asked Questions
Is it private and secure?
Yes. All calculations happen in your browser. Your data never leaves your device.
Does it work for taxes and tips?
Yes quickly add/remove VAT/GST/sales tax and compute tips (10–25%) and service charges.
Can I do percentage increase/decrease?
Yes enter your initial and final values to see the exact percent change.
Is it really free forever?
Yes Top, Fast, Best and Lifetime Free Unlimited. No signup, no paywalls, no watermarks.
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