Scientific Calculator
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Scientific Calculator

This free online scientific calculator handles trigonometry, logarithms, exponents, roots, factorials, and memory storage directly in your browser. It supports both degree and radian modes, nested parentheses, and full keyboard input. No download, account, or payment is required to use it.

Model SC-100

DEG
History

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    How to Use the Scientific Calculator

    1. Type a number using the digit buttons or your keyboard.
    2. Choose an operator (+, −, ×, ÷, xy) or a scientific function such as sin, log, or √.
    3. Add parentheses to control the order of operations in longer expressions.
    4. Set the angle mode to DEG or RAD before using trigonometric functions.
    5. Press “=” or the Enter key to see the result.
    6. Use M+, M−, MR, and MC to add to, subtract from, recall, or clear the memory value.

    Features

    • Trigonometric functions: sin, cos, tan and their inverses (asin, acos, atan)
    • Base-10 logarithm (log) and natural logarithm (ln)
    • Exponents, square root, and cube root
    • Constants: π (pi) and e (Euler’s number)
    • Factorial (x!) and percentage (%) calculations
    • Memory functions: M+, M−, MR, MC
    • Degree and radian toggle for angle-based calculations
    • Parentheses support for nested, multi-step expressions
    • Running calculation history you can reuse
    • Full keyboard input support
    • Responsive layout for mobile, tablet, and desktop
    • Clear, non-disruptive handling of invalid expressions

    Frequently Asked Questions

    What is a scientific calculator used for?

    A scientific calculator is used for advanced math beyond basic arithmetic, including trigonometry, logarithms, exponents, roots, and factorials. It is commonly used in algebra, geometry, physics, engineering, and statistics coursework.

    How do I calculate sine, cosine, and tangent online?

    Enter the angle, then press the sin, cos, or tan button on this calculator. Check the DEG/RAD indicator first, since the result depends on whether the angle is in degrees or radians.

    Is this calculator free to use?

    Yes. This scientific calculator is completely free, requires no account or download, and works directly in your web browser.

    Does this calculator work on mobile devices?

    Yes. The layout is fully responsive and adjusts to phones, tablets, and desktop screens, with touch-friendly buttons.

    What is the difference between a scientific and a standard calculator?

    A standard calculator handles only basic arithmetic: addition, subtraction, multiplication, and division. A scientific calculator adds trigonometric functions, logarithms, exponents, roots, factorials, and constants like pi and e.

    How do I switch between degrees and radians?

    Press the DEG/RAD button to toggle the angle mode. The current mode is shown on the calculator display and applies to all trigonometric calculations.

    Can I use my keyboard instead of clicking the buttons?

    Yes. Number keys, the standard operators (+, -, *, /), parentheses, Enter, and Backspace all work directly from a physical keyboard.