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Scientific Calculator
An accurate, interactive scientific calculator designed to emulate the fx 991, suitable for students, educators, and professionals needing complex calculations.
Check It Yourself
About This Tool
Our free online scientific calculator replicates the popular fx 991 model, providing users with a comprehensive set of mathematical functions needed for advanced science, engineering, and math tasks.
This tool supports basic arithmetic, scientific functions like sine, cosine, tangent, and their inverses, logarithms, exponentials, roots, factorials, permutations, and combinations. Its intuitive interface allows quick mode switching between degrees and radians, decimal and scientific notation, making it perfect for students studying trigonometry, engineers performing quick calculations, or teachers preparing lessons.
All calculations are performed locally within the browser, ensuring near-instant results without reliance on external servers. The calculator features a history log for tracking recent computations, memory functions, and a responsive layout compatible with desktops and mobile devices.
Whether you're solving complex equations, checking scientific data, or practicing math exercises, this tool offers the precision and speed required for academic, professional, and personal use.
How to Use
1. Input numbers using the on-screen buttons or your keyboard.
2. Select desired functions from the calculator buttons (e.g., sin, log, power).
3. Toggle modes for degrees/radians and notation in the mode switchers.
4. Press '=' or 'Calculate' to view the result instantly below.
5. Use history to review previous calculations or clear history to reset.
FAQs/Additional Resources
Find Quick Answers
Does this calculator support advanced functions like permutations and logarithms?
Is the calculator available on mobile devices?
Are calculations performed locally or do I need an internet connection?
Can I save or export my calculation history?
Does the tool support unit conversions or only mathematical calculations?
User Reviews
See What Others Are Saying
John Doe
CEO of Company
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John Doe
CEO of Company
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
John Doe
CEO of Company
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
John Doe
CEO of Company
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
John Doe
CEO of Company
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
John Doe
CEO of Company
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
John Doe
CEO of Company
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
John Doe
CEO of Company
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
John Doe
CEO of Company
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
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