About PercentageFormula
Free AI-powered percentage calculators for students, shoppers, professionals, and anyone who needs fast, accurate math.
Our Mission
PercentageFormula was built with one goal: make percentage calculations effortless for everyone. Whether you're figuring out a restaurant tip, calculating a salary raise, comparing two prices, or checking a test score — we give you the answer instantly, with full AI-powered analysis so you can understand the math and make better decisions.
We believe useful tools should be free, fast, and simple. No sign-ups, no downloads, no popups — just type in your numbers and get your answer, with smart context that actually helps you decide.
What Makes Us Different
Most calculator websites give you a number. We give you understanding. Every result on PercentageFormula comes with:
- AI Smart Analysis — context, meaning, and strategic insights powered by Llama 3.3
- Step-by-step solution — see exactly how the math works
- Real-life examples — relatable scenarios you can click to try
- Bilingual support — full Arabic and English with RTL layout
- Dark & Light mode — comfortable in any environment
Our Calculators
- What is X% of Y? — Find any percentage of any number. Great for tips, taxes, commissions.
- X is what % of Y? — Convert part-to-whole ratio into a percentage. Ideal for test scores and budgets.
- Percentage Increase/Decrease — Measure how much something has grown or shrunk. Used for salaries, prices, revenue.
- Percentage Difference — Compare two equal-standing values symmetrically. Used in science and price comparisons.
- Discount Calculator — Instantly find sale price and savings for any discount. Perfect for shopping.
- AI Chat Advisor — Ask anything in plain language. Get expert financial analysis instantly.
Technology
All calculations run in your browser using JavaScript — no data is sent anywhere. The AI Chat feature uses the Groq API with Llama 3.3-70b via a secure Cloudflare Worker that keeps API keys protected on the server side. Images are generated using Cloudflare Workers AI with the flux-1-schnell model.
Privacy
Your inputs stay on your device. We do not store, track, or sell any personal information. Read our full Privacy Policy for details.
Contact
Have feedback, a suggestion, or found an error? Reach out at hello@percentageformula.com.
Our Tools
🧮 X% of Y
Find any percentage of a number instantly.
🔢 Percent Of
X is what percentage of Y?
📈 % Increase
Measure growth or decline between two values.
↔️ % Difference
Compare any two values symmetrically.
🏷️ Discount
Find sale price and savings from any discount.
🤖 AI Chat
Ask anything in plain language, get expert analysis.