Advanced Calculator

Perform everyday arithmetic with a browser calculator that supports decimals, percentages, sign changes, standard operators, keyboard-style controls, and dark mode.

What this tool does

Advanced Calculator provides a familiar four-function calculator interface for addition, subtraction, multiplication, division, decimals, percentages, and sign changes. Enter values with the on-screen keypad or keyboard, view the current expression and result, and switch the interface to dark mode when preferred.

Who this is for

• Anyone who needs a quick arithmetic calculation without installing software
• Students practicing basic operations and percentages
• People checking estimates, totals, or split calculations in a browser

How to use this tool

1. Enter the first number with the keypad or keyboard
2. Choose ÷, ×, −, or +, then enter the next number
3. Use the decimal, percent, or ± controls when needed
4. Press = to calculate the result
5. Press AC to clear the current calculation, or use the theme button to switch to dark mode

Inputs

• Numbers — Digits 0–9 and decimal point
• Operators — Addition, subtraction, multiplication, and division
• Modifiers — Percent and positive/negative sign
• Input method — On-screen buttons or supported keyboard input

Outputs

• Expression — The current arithmetic operation shown in the display
• Result — The calculated numeric value after pressing =
• Interface state — Light or dark theme preference for the calculator view

Example use cases

• Everyday arithmetic — Check totals, differences, and ratios
• Quick estimates — Calculate rough project, shopping, or travel amounts
• Percentage checks — Work out discounts, increases, and proportional values

Frequently asked questions