A Basic Calculator that handles everyday arithmetic right in your browser. Enter any first number and second number, choose your operation (add, subtract, multiply, or divide), and get your result immediately. Supports percentage, square root, and sign toggle for quick calculations without reaching for a physical calculator.
Result
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Expression
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Rounded Result (2 dp)
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Operation Performed
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This calculator supports addition (+), subtraction (−), multiplication (×), division (÷), exponents (xʸ), square root (√x), and percentage (%). These cover the most common everyday arithmetic needs.
Select '% Percentage' as the operation, enter your base value as the First Number and the percentage rate as the Second Number. The calculator returns what that percentage of the base value equals. For example, 200 and 15% returns 30.
Select '√x Square Root' as the operation and enter the number you want to find the square root of in the First Number field. The Second Number field is not required for this operation. The result is the principal (positive) square root.
Yes — select 'xʸ Exponent' as the operation, enter the base as the First Number and the exponent as the Second Number. For example, entering 2 and 10 calculates 2 to the power of 10, which equals 1024.
Dividing by zero is mathematically undefined. If you enter zero as the Second Number with the division operation, the calculator will display an error message rather than an incorrect result.
Results are displayed with up to 10 decimal places of precision and also shown rounded to 2 decimal places for convenience. JavaScript's standard floating-point arithmetic is used, which is accurate for the vast majority of everyday calculations.
Clear Entry (CE) removes only the most recently entered number or digit, leaving any previously stored values intact. All Clear (AC) resets the entire calculator, clearing all numbers, operations, and memory to return to a fresh state.
Memory Plus (M+) adds the displayed number to memory storage. Memory Minus (M−) subtracts it. Memory Recall (MR) brings the stored value back to the display. Memory Clear (MC) wipes the memory completely. These functions let you store intermediate results during multi-step calculations.