Scientific Calculator

What this calculator does

The Scientific Calculator evaluates mathematical expressions with the functions found on a scientific or graphing calculator. It supports arithmetic, parentheses, powers, roots, factorials, logarithms, exponential functions, trigonometric functions, constants, angle modes, and memory keys.

It is useful for homework, engineering calculations, statistics, physics, and any task that needs more than the four basic operations. The calculator evaluates the expression you enter and returns a numeric result.

How to use this calculator

1. Type an expression in the input field or press the keypad buttons.
2. Choose degrees or radians for trigonometric functions.
3. Press Calculate or the Enter key.
4. Use the answer and memory keys to continue a calculation.

The keypad includes numbers, arithmetic operators, parentheses, powers, roots, π, e, logarithms, trigonometric functions, inverse trigonometric functions, factorial, percent, sign change, memory, backspace, clear, and equals.

Expression rules

The calculator follows the standard order of operations:

1. Parentheses
2. Powers and roots
3. Multiplication and division
4. Addition and subtraction

Functions such as sin, cos, tan, ln, and log apply to the expression that follows them. The angle mode controls whether trigonometric functions interpret their input in degrees or radians.

Very large or very small results may be shown in scientific notation. For example, a value such as 1.23 × 10¹⁵ may appear as 1.23e15.

What the results mean

The result replaces the expression in the input field and becomes the current answer. You can use the answer key to insert it into a new expression. The memory keys store and recall a value for multi-step work.

If the expression is invalid, the calculator shows an error instead of returning a misleading number. Common errors include unbalanced parentheses, division by zero, and a function applied outside its domain.

Assumptions and limitations

• Calculations use double-precision floating-point arithmetic, so very small rounding differences can appear.
• The calculator does not draw graphs or solve equations symbolically.
• The factorial key is intended for non-negative integers within a reasonable size.
• Trigonometric results depend on the selected angle mode.
• The calculator does not support complex numbers, matrices, or symbolic variables.
• Percent behavior follows the calculator's input rules; it is not a general percentage-of calculator.

Frequently asked questions

How do I switch between degrees and radians?

Use the Deg and Rad buttons on the keypad. The selected mode applies to sin, cos, tan, and their inverses.

Why does sin(30) give a different answer than I expected?

Check the angle mode. In degree mode, sin(30) is 0.5. In radian mode, the input 30 is interpreted as 30 radians, which is a different angle.

Can I use the previous answer in a new calculation?

Yes. Press the Ans key to insert the last result into the current expression.

What should I do if the calculator shows an error?

Check for unbalanced parentheses, an invalid function input, or division by zero. Clear the expression and try again with a smaller sub-expression to isolate the problem.

Source

Reference: Calculator.net — Scientific Calculator.