5 Function Calculator - Free Online Tool with History

History

How to Use the Calculator

This online calculator mimics the functionality of a standard five-function calculator, making it intuitive to use. Simply click the buttons to perform your calculations. The display at the top shows your current numbers and results, while the history log on the side keeps a record of your past equations.

Functions:

  • Addition (+), Subtraction (-), Multiplication (X), Division (÷): Perform standard arithmetic.
  • Percentage (%): Easily calculate percentages. For example, to find 25% of 200, enter 200 * 25 %.
  • Clear (C): Press 'C' to clear the current entry and reset the calculator.
  • History: Your calculations are automatically saved in the history log for easy reference.

Order of Operations (PEMDAS)

Like a standard handheld calculator, this tool solves equations from left to right as you enter them. To solve a problem that involves multiple types of operations (like multiplication and addition), you must enter it in the correct order to get the right answer.

The correct mathematical order of operations is often remembered by the acronym PEMDAS:

  1. Parentheses
  2. Exponents
  3. Multiplication and Division (from left to right)
  4. Addition and Subtraction (from left to right)

For example, to correctly solve 5 + 2 * 3, you must perform the multiplication first. You would enter it into the calculator like this:

  1. First, calculate the multiplication part: Press 2 * 3 =. The calculator will show 6.
  2. Next, add the remaining number: Press + 5 =.
  3. The final, correct answer is 11.

Understanding Calculator Memory Functions

Many handheld calculators include memory functions like M+, M-, MR, and MC. To use them, you first get a number on the screen (either by typing it or as the result of a calculation) and press M+ to store it. These buttons then allow you to modify or recall that number from a single memory slot. Here's what they do:

  • M+ (Memory Add): Adds the number on the display to the number stored in memory.
  • M- (Memory Subtract): Subtracts the number on the display from the number in memory.
  • MR (Memory Recall): Recalls the number stored in memory and displays it on the screen.
  • MC (Memory Clear): Clears the number stored in memory, resetting it to zero.

While useful on a physical device with a limited display, these functions are less necessary here. This online calculator features a persistent History Log, which provides a more powerful and intuitive way to see and reuse your previous calculations without needing to manually store and recall numbers.

Frequently Asked Questions

What is a five function calculator?

A five-function calculator is a basic calculator that can perform the four standard arithmetic operations (addition, subtraction, multiplication, and division) plus a fifth function, which is typically calculating percentages (%). This makes it slightly more advanced than a simple four-function calculator and very useful for everyday tasks like calculating tips or discounts.

How do I use the history log?

The history log automatically records each calculation you make. It's displayed next to the calculator on desktop screens and below it on mobile. You can use it to review your previous calculations.

How does the percentage (%) button work?

The percentage button allows you to easily calculate percentages. For example, to find 20% of 150, you would type '150', press the 'X' (multiplication) button, type '20', and then press the '%' button. The result, 30, will be displayed.

What is the order of operations for this calculator?

This calculator solves equations from left to right as you enter them. To get the correct answer for a problem involving multiple types of operations, you must enter them in the correct order according to PEMDAS (Parentheses, Exponents, Multiplication and Division, Addition and Subtraction).

Can this calculator handle negative numbers?

Yes, you can perform calculations with negative numbers. Use the subtraction (-) button to enter a negative number at the start of your calculation or within an equation.

What is the difference between 'C' and 'CE' buttons?

This calculator has a 'C' (Clear) button, which clears all current input and resets the calculation. Some calculators also have a 'CE' (Clear Entry) button, which only clears the most recent number entered, not the entire equation. For simplicity, this tool uses the 'C' function.