Free Scientific Calculator Online
Welcome to our free scientific calculator online, designed to provide an advanced calculator for students and professionals alike. Whether you are tackling complex math problems, engineering calculations, or scientific data analysis, this tool offers a comprehensive set of functions to meet your needs. Accessible from any device and easy to use, our calculator combines precision with convenience, making it an essential resource for anyone requiring accurate mathematical computations.
How It Works
This advanced calculator supports a wide range of scientific functions, including trigonometric calculations such as sine (sin), cosine (cos), and tangent (tan). You can switch between degrees and radians modes using the toggle button, ensuring your results align with the requirements of your specific task.
Input expressions directly into the display or use the intuitive buttons to build your calculations. The calculator automatically interprets and processes complex formulas, including nested parentheses and combined operations. With real-time feedback and error handling, it ensures you get accurate results quickly and efficiently.
Practical Uses
Students: Solve trigonometry, algebra, and calculus problems with ease, supporting coursework and exam preparation.Engineers and Scientists: Perform precise calculations involving logarithms, powers, and factorials essential for technical analyses.Teachers and Educators: Demonstrate mathematical concepts interactively, enhancing learning experiences.Everyday Users: Calculate complex expressions, convert between degrees and radians, and explore advanced math functions without installing software.
Frequently Asked Questions
What is the degrees/radians toggle for? The toggle switches the mode for trigonometric functions. Degrees measure angles in degrees (0° to 360°), while radians measure angles in radians (0 to 2π). Use the mode that matches your problem's requirements.
How do I calculate factorials? Use the factorial button (!) to compute the product of all positive integers up to a given number, which is useful in permutations, combinations, and probability calculations.
Is this scientific calculator online free to use? Yes, this free scientific calculator is accessible online without any cost or installation, providing a reliable tool for all your advanced calculation needs.
What is the difference between ln and log? ln is the natural logarithm (base e ≈ 2.718), commonly used in calculus and natural sciences. log is the common logarithm (base 10), often used in engineering and everyday calculations.
How do I calculate powers and roots? Use ^ for powers (e.g., 2^3 = 8) and √ for square roots (e.g., √16 = 4). For other roots, use fractional exponents: the cube root of 8 is 8^(1/3) = 2.
What are the constants π and e? π (pi) is approximately 3.14159 and represents the ratio of a circle's circumference to its diameter. e (Euler's number) is approximately 2.71828 and is the base of natural logarithms.
Why does sin(90) give different results in Deg vs Rad mode? In Deg mode, sin(90) = 1 (90 degrees). In Rad mode, sin(90) ≈ 0.894 because 90 is interpreted as 90 radians. Always check your mode!
How do I use the inverse function (1/x)? The 1/x button calculates the reciprocal of your current expression. For example, if you have 4 displayed, pressing 1/x gives you 0.25.
Sources & further reading
Khan Academy — order of operations, the evaluation rules this calculator follows. khanacademy.org
Wolfram MathWorld — reference definitions for the functions on this calculator (trigonometry, logarithms, factorials). mathworld.wolfram.com
David Goldberg — "What Every Computer Scientist Should Know About Floating-Point Arithmetic", why binary calculators show tiny rounding differences. docs.oracle.com
Written by Alex van den Berg · Last reviewed 4 July 2026 · How we test our calculators · Report an error
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