Scientific Calculator
Free scientific calculator with trigonometry, logarithms, factorials, and graphing. Evaluate complex math expressions instantly for students and professionals.
About This Calculator
The Scientific Calculator is a free online math tool designed for students, engineers, scientists, and professionals who need to evaluate complex mathematical expressions quickly. It supports a wide range of functions including trigonometric operations (sin, cos, tan), logarithms (log base 10 and natural log ln), exponentials, factorials, square roots, absolute values, and the mathematical constants pi and e. The calculator also features interactive function graphing for expressions containing the variable x.
To use the calculator, enter a math expression in the text input field or build one using the button keypad. Press Calculate or the = button to evaluate the expression. The result displays in scientific notation for non-integer values. For expressions containing x as a variable, the Graph tab plots the function curve from x = -10 to x = 10 with over 200 data points, and the Values tab shows a bar chart of sampled function values for quick reference.
The calculator follows standard operator precedence (PEMDAS/BODMAS) and supports combined operations, nested parentheses, and mixed functions in a single expression. Trigonometric functions use radians by default. For degree input, multiply by pi/180 first.
This tool is ideal for algebra, calculus, trigonometry, physics, and engineering calculations. It works on all devices including desktops, tablets, and smartphones without any installation or registration.
Frequently Asked Questions
What functions does the scientific calculator support?
The scientific calculator supports trigonometric functions (sin, cos, tan), logarithms (log base 10 and natural log ln), square root, powers (^), factorial (!), absolute value, and the constants pi and e. You can also use variable x for function graphing.
How do I graph a function?
Enter an expression with variable x, like 'x^2' or 'sin(x)', and click Calculate. The Graph tab will show the curve plotted from x = -10 to x = 10. You can toggle between Graph and Values views to see the function's data points.
Does the calculator use degrees or radians?
Trigonometric functions (sin, cos, tan) use radians by default. To use degrees, convert manually: for example, sin(45°) = sin(45 * pi / 180). The calculator does not have a degree mode toggle.
Can I evaluate expressions with multiple operations?
Yes, the calculator supports standard operator precedence (PEMDAS/BODMAS). You can combine multiple operations in one expression, such as sin(30) + 2 * 5! / sqrt(16). Use parentheses to override the default order of operations.
What does the factorial function do?
The factorial function (n!) calculates the product of all positive integers from 1 to n. For example, 5! = 5 × 4 × 3 × 2 × 1 = 120. It works only for non-negative integers. For non-integer values, the calculator uses the gamma function approximation.
How do I use constants like pi and e?
Type 'pi' for the mathematical constant π (≈ 3.14159) or 'e' for Euler's number (≈ 2.71828). These constants can be used in any expression, such as 2 * pi * 5 or e^2. You can also click the pi and e buttons on the keypad.
Is this calculator free to use?
Yes, this scientific calculator is completely free to use online with no registration, downloads, or limitations. It works on desktop and mobile browsers for students, teachers, engineers, and anyone needing quick math calculations.