Lightning Fast
Instant calculations with real-time validation
Free Online Percentage Calculator
Hey there! I built this calculator because I got tired of searching for a simple, fast percentage calculator that actually works. No ads, no tracking, just pure math magic. Whether you need to calculate discounts, markups, or just figure out what 15% of 200 is, you're in the right place.
100% Private
Your calculations never leave your device
Smart History
Track your recent calculations automatically
Advanced Percentage Calculator
What I Built for You
I'm a developer who believes that useful tools should be free and accessible to everyone. This percentage calculator is my way of giving back to the community. I've packed it with all the features I wished existed when I was looking for a calculator like this.
What You Can Do:
- Basic Math: What is X% of Y? (my most used feature)
- Reverse Calculations: X is what percent of Y?
- Change Analysis: Calculate increase/decrease from A to B
- Business Tools: Markup and discount calculations
- Financial Planning: Compound interest over time
Everything runs in your browser, so your data stays private. I don't see what you're calculating, and I don't want to. That's the whole point - a tool that respects your privacy.