About PercentLab
Making percentage calculations simple, accurate, and educational
Our Mission
PercentLab was created with a simple goal: to provide a fast, accurate, and educational percentage calculator that anyone can use. We believe that understanding percentages shouldn't be complicated, and that's why we provide detailed explanations with every calculation.
Whether you're a student learning about percentages for the first time, a professional making financial calculations, or someone shopping for the best deal, PercentLab is here to help you get accurate results instantly.
Accurate Calculations
Our calculator uses proven mathematical formulas to ensure every result is precise and reliable.
Free Forever
No registration, no hidden fees, no paywalls. Just free, unlimited calculations for everyone.
Lightning Fast
Built with modern web technologies for instant results without any delays or loading times.
Privacy Focused
We don't collect personal information. Your calculations stay private and secure.
How Our Calculators Work
PercentLab uses standard mathematical formulas that have been tested and verified for accuracy. Every calculation is performed in real-time in your browser using JavaScript, ensuring your data never leaves your device.
We provide three types of percentage calculators:
- Percent Of: Calculates what a percentage of a number equals (e.g., 20% of 200 = 40)
- What Percent: Determines what percentage one number is of another (e.g., 40 is 20% of 200)
- Increase/Decrease: Calculates percentage change between values or applies percentage changes to numbers
Educational Approach
We believe in not just giving you answers, but helping you understand how those answers are reached. That's why every calculation includes:
- The Formula: See the exact mathematical formula used
- Step-by-Step Solution: Follow along with each step of the calculation
- Real-Life Examples: Understand how the calculation applies to everyday situations
- Visual Charts: See the proportion or comparison visualized
This educational approach helps students learn, professionals verify their work, and everyone build confidence in their understanding of percentages.
Our Commitment
We're committed to maintaining PercentLab as a free, accurate, and user-friendly resource. We continuously improve our calculators based on user feedback and ensure our formulas are mathematically sound.
The site is supported by non-intrusive advertisements, which allow us to keep the service free for everyone. We respect your privacy and don't track personal information beyond basic analytics to improve the service.
Contact Us
Have questions, suggestions, or feedback? We'd love to hear from you. Visit our contact page to get in touch with our team.