About this Calculator

What this tool does

This calculator performs basic arithmetic—addition, subtraction, multiplication, division, and percent—with live preview, result-only mode after equals, and click-to-copy results.

It keeps a local history of previous calculations, supports chaining using the last result, and can format results using Indian digit grouping like 1,23,456.

How it works

Expressions can be constructed via on-screen keys or PC keyboard input and previewed live. On pressing equals or Enter, the expression is evaluated safely and the output replaces the expression view. Pressing an operator next uses the previous output as the first operand for the new calculation.

Calculation model

• Normalized operators: ÷ → /, × → *, − → -
• Evaluation executes the expression with standard operator precedence: (), *///%, then +/-.
• Results are rounded to mitigate floating-point noise and displayed with optional Indian digit grouping.

Formulas

• Addition: ( a + b )
• Subtraction: ( a - b )
• Multiplication: ( a * b )
• Division: ( a div b )
• Percentage:

Indian digit grouping

When enabled, numbers are formatted using the Indian numbering system locale (en-IN). For example, 1234567.89 becomes 12,34,567.89. Toggle this in Settings under "Indian digit grouping."