Scientific Calculator

Calculator

0

History

Graphing

Function f(x)

x Min

x Max

Settings

Output Precision (Decimal Places) 4 6 8 10 12

Theme (Light/Dark)

Complex Number Mode

How This Scientific Calculator Works

This calculator is built for security, precision, and performance. Unlike basic calculators that might use a function like eval(), which can be a security risk, this tool uses the powerful math.js library. Here’s a brief overview:

• Safe Expression Parsing: When you enter an expression like sin(pi/2) + 5!, math.js safely parses it. It understands mathematical hierarchy (PEMDAS/BODMAS), functions, variables, and constants without executing arbitrary code.
• High Precision Engine: All calculations are performed using high-precision numbers to ensure accuracy for scientific and engineering tasks. The number of decimal places in the final result can be adjusted in the Settings tab.
• Built-in Functions: The calculator supports a wide range of mathematical functions, from basic arithmetic and trigonometry (in both degrees and radians) to logarithms, factorials, and constants like pi and e.
• Graphing with Chart.js: The graphing tool uses the same math.js parser to evaluate your function f(x) at hundreds of points across your specified domain. These points are then plotted on a responsive canvas using the popular Chart.js library.

Tips for Using the Calculator

• Keyboard Shortcuts: You can type directly into the display. Press Enter to calculate and Backspace to delete.
• Operator Precedence: The calculator follows standard mathematical order of operations. Use parentheses () to group expressions and enforce the order you want, for example, (2+3)*4.
• Degrees vs. Radians: Trigonometric functions like sin, cos, and tan depend on whether you are in Degree (DEG) or Radian (RAD) mode. The current mode is shown on the top-left button of the keypad. Click it to toggle.
• Implicit Multiplication: You can often omit the multiplication operator, for example, by typing 2pi instead of 2*pi or 5(2+1) instead of 5*(2+1).
• History Recall: Click any entry in the History tab to load it back into the calculator for editing or re-calculation.
• Graphing Domain: For best results when graphing, start with a reasonable domain (e.g., x Min: -10, x Max: 10). For functions that change rapidly, a smaller domain will show more detail.

FAQ

How accurate is this scientific calculator?

This calculator uses the math.js library, which relies on standard IEEE 754 double-precision floating-point numbers. This provides a high degree of precision suitable for most scientific, educational, and engineering applications. Precision can be adjusted in the settings.

Does it support trigonometric functions in degrees?

Yes. You can switch between Degrees (DEG) and Radians (RAD) mode using the button on the keypad or in the settings. All trigonometric calculations will respect the currently selected mode.

Is my data safe? Is the calculator usable offline?

All calculations and history are processed directly in your browser. No data is ever sent to a server. Once the page is loaded, the calculator is fully functional offline, provided the necessary libraries (math.js, Chart.js) have been cached by your browser.

How does the expression parser work?

Instead of using the insecure eval() function, this calculator uses the robust math.js library. Math.js employs a safe and powerful expression parser that understands operator precedence, functions, and constants, preventing any security risks associated with arbitrary code execution.