About Us

Our Mission

OnSciCalc was built with a simple mission: to provide a powerful, free, and accessible scientific calculator that anyone can use — without downloads, without accounts, and without limitations. We believe that access to reliable mathematical tools should never be a barrier to learning or professional work.

What We Offer

Our online scientific calculator combines the functionality of dedicated hardware calculators — like the Casio fx-991es and Texas Instruments models — with the convenience of modern web technology. Here's what makes OnSciCalc stand out:

• Comprehensive Scientific Functions — Trigonometric functions (sin, cos, tan and their inverses), logarithms, exponents, square roots, cube roots, factorials, and more.
• Fraction Support — Perform fraction calculations directly in the calculator interface.
• Dual Mode — Switch between Beginner and Advanced modes based on your skill level and needs.
• DEG/RAD Toggle — Easily switch between degree and radian angle modes for trigonometric calculations.
• AI-Powered Suggestions — Get intelligent expression suggestions as you type, reducing syntax errors and speeding up your workflow.
• Calculation History — Review and reuse previous calculations with the built-in history panel.
• Keyboard Shortcuts — Power users can type expressions directly using keyboard shortcuts for maximum speed.
• Dark & Light Themes — Comfortable viewing in any lighting condition with automatic theme persistence.

Who We're For

OnSciCalc is designed for a wide range of users:

• Students — From high school algebra to university calculus, OnSciCalc supports the mathematical operations you need for coursework.
• Engineers — Electrical, mechanical, civil, and software engineers can rely on our calculator for quick computations involving complex numbers, matrices, and statistical functions.
• Scientists — Researchers and lab professionals can perform rapid calculations with scientific notation and precision functions.
• Professionals — Anyone who needs fast, reliable mathematical computations in their daily work.
• Educators — Teachers and tutors can use OnSciCalc as a teaching tool in classrooms and online sessions.

Built with Modern Technology

OnSciCalc is built using cutting-edge web technologies including Astro, Tailwind CSS, and TypeScript. Our calculator runs entirely in your browser — all computations happen locally on your device, ensuring your data stays private and calculations are instant.

We test and optimize our calculator across all modern browsers including Chrome, Firefox, Safari, and Edge, and ensure it works flawlessly on desktop, tablet, and mobile devices.

Our Commitment

We are committed to keeping OnSciCalc free, ad-free (or minimally monetized), and continuously improving. We welcome feedback from our users and actively incorporate feature requests and bug reports into our development roadmap.

If you have suggestions, found a bug, or just want to say hello, don't hesitate to reach out through our Contact Us page.

Get Started

Ready to calculate? Head back to our calculator and start computing.