About Us
What is Calculator.diy
Calculator.diy is a free online library of calculators and tools for math, finance, health, fitness, conversions, construction, cooking, and everyday measurements. We believe that whether you are creating a financial plan, tracking your health, measuring for a project, or converting units, you deserve tools that are fast, simple, accurate, reliable, easy to use, accessible, and respectful of your time.
Who We Are
We are a team of IT professionals united by a common goal: to build high-quality, accessible tools for the modern web. Our team combines technical expertise with a passion for digital usability, making sure each tool we release meets high standards of accuracy and performance.
Our Founder: Calculator.diy was founded by Kenneth Kayan, a product builder, with a simple goal: to create a centralized hub of high-quality utilities that anyone can use to improve their life. His work focuses on combining clear design, reliable calculations, and strong privacy principles to develop tools that you can trust and want to use repeatedly.
Our Mission: Empowerment Through Precision
The "DIY" in our name stands for more than just "Do It Yourself"; it represents the independence that comes with understanding your own numbers. We don't aim to be the biggest calculator platform online, but rather the most useful. Our mission is to eliminate guesswork from life's most important calculations. Whether it's calculating a mortgage or estimating your carbon footprint, we provide the logic to bring your vision to life.
What We Offer
We built a comprehensive set of tools across various key categories.
- Financial & Business: Manage your money effectively with our loan, retirement, salary calculators, and more.
- Health & Wellness: Monitor your progress with BMI, calorie, and body fat estimates, among other tools.
- Academic & Science: Tackle complex problems with our algebra, trigonometry, calculus calculators, and more.
- Everyday Utilities: Make your day easier with unit converters, age calculators, and security tools.
How Our Calculators Work
Every calculator on Calculator.diy uses proven formulas and verified calculation methods to ensure accurate and reliable results. All calculations are performed directly in your browser, meaning the numbers you enter are processed locally on your device and not stored on our servers. This approach helps protect your privacy while still providing quick performance.
Where appropriate, we also provide explanations and context to help you better understand the data behind the results.
Calculation Methodology
Our process usually includes:
- Researching standard formulas used in the relevant field
- Carefully implementing the calculation logic within the tool
- Testing results against real-world examples to ensure accuracy
- Providing explanations when helpful so users can understand the results
Sources & References
We strive to provide clear and reliable calculation tools. Our calculators rely on widely accepted formulas, scientific research, and publicly available standards.
Health & Fitness References
- World Health Organization (WHO)
- Centers for Disease Control and Prevention (CDC)
- National Institutes of Health (NIH)
Finance & Economics References
- International Monetary Fund (IMF)
- U.S. Federal Reserve
- Organisation for Economic Co-operation and Development (OECD)
Mathematics & Scientific Formulas
- Standard mathematical formulas and engineering references
- Academic publications and open educational resources
Unit Conversion Standards
- National Institute of Standards and Technology (NIST)
- International System of Units (SI)
We consistently review and update our tools to stay aligned with widely accepted standards and trusted sources.