Fast, clean 4-function electronic calculator with PEMDAS chain execution, memory registers, exponential scientific notation (EXP), and keyboard support. Also check the scientific calculator.
A basic calculator (also known as a standard four-function calculator) is designed to perform essential arithmetic operations: addition ($+$), subtraction ($-$), multiplication ($\times$), and division ($\div$).
While simple in layout, modern online basic calculators include helpful extended features such as order of operations (PEMDAS) evaluation, memory registers ($M+$, $M-$, $MR$), and scientific exponential entry ($EXP$).
Recalls the most recently evaluated result into your current active expression without re-typing.
Multiplies the preceding number by 10 raised to the power of the exponent ($a \times 10^b$). For example, entering 3.5 EXP 6 evaluates to $3,500,000$.
• M+: Adds displayed value to memory.
• M-: Subtracts displayed value from memory.
• MR: Recalls stored memory total.
• MC: Clears memory register to 0.
• RND: Generates a pseudo-random decimal number between 0 and 1.
• ±: Inverts the sign of the active number between positive and negative.
| Operation | Symbol | Algebraic Form | Description |
|---|---|---|---|
| Addition | + | a + b | Combines two or more quantities into a sum total. |
| Subtraction | − | a − b | Determines the numerical difference between values. |
| Multiplication | × | a × b | Calculates repeated addition of a number $a$, $b$ times. |
| Division | ÷ | a ÷ b | Splits a dividend $a$ into $b$ equal parts (with $b \neq 0$). |
Yes! When evaluating combined operations like 5 + 3 × 2, multiplication and division are prioritized before addition and subtraction, correctly yielding 11 instead of 16.
When memory is active, click the small "MC" indicator on the display or press AC to reset the calculator.
Yes! You can use your computer's numeric keypad (0–9), decimal (.), operators (+, -, *, /), Enter or = to evaluate, Backspace to delete digits, and Escape or C to clear.