Scientific Calculator

A sleek, free online scientific calculator packed with advanced features for calculating percentages, fractions, exponential functions, logarithms and trigonometric values.

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How to Use a Scientific Calculator

Scientific calculators are powerful tools used to solve complex mathematical problems in subjects such as algebra, geometry, trigonometry, and calculus. Below is a clear overview of the main operations and functions commonly found on a scientific calculator.

Basic Operations

These functions appear on nearly every calculator:

Addition (+), Subtraction (–), Multiplication (×), and Division (÷)
Enter the numbers and select the appropriate operator.
Example: To calculate 8 + 5, press 8, +, 5, then =.

Equals (=)
Press to evaluate the expression and display the result.

Percentage (%)
Converts a percentage value into its decimal equivalent.

Plus/Minus (+/−)
Toggles a number between positive and negative.

Mode and Settings

Secondary Functions (2nd)
Allows access to alternate functions, such as inverse trigonometric operations (e.g., sin⁻¹).

All Clear (AC)
Clears the entire calculation and resets the calculator.

Degree/Radian Mode (Deg/Rad)
Switches between degrees and radians for trigonometric calculations, eliminating the need for manual conversion.

Advanced Mathematical Functions

Exponents (x², x³, xʸ)

  • x² squares a number
  • x³ cubes a number
  • xʸ raises a number to any power
    Example: To calculate 2⁴, press 2, xʸ, 4, then =.

Roots (√, ³√x, ʸ√x)

  • √ finds the square root
  • ³√x finds the cube root
  • ʸ√x finds any nth root

Factorial (x!)
Calculates the factorial of a number (commonly used in probability and statistics).

Logarithms (log, ln)

  • log calculates base-10 logarithms
  • ln calculates natural logarithms (base e)
    Example: log(100) = 2, ln(e) = 1

Trigonometric Functions (sin, cos, tan)
Calculates sine, cosine, and tangent of an angle.
Ensure the calculator is set to the correct degree or radian mode.

Inverse Trigonometric Functions (sin⁻¹, cos⁻¹, tan⁻¹)
Used to find angles from known trigonometric values.

Absolute Value (|x|)
Returns the positive value of a number regardless of its sign.

Special Buttons

Pi (π)
Inserts the constant π (approximately 3.14159).

Euler’s Number (e)
Inserts the constant e (approximately 2.718).

Last Answer (Ans)
Recalls the most recent result for use in a new calculation.

Parentheses ( )
Helps structure complex expressions and ensures the correct order of operations, such as (2 + 3) × 4.

Using these features, a scientific calculator allows you to perform both simple and advanced calculations efficiently and accurately.