Everything you need to get the most out of the calculator, from basics to keyboard shortcuts.
An online calculator is a calculator that runs directly in your browser instead of on a physical device. It works the same way a pocket or desktop calculator does — you enter numbers and operations and it returns a result — but it needs no installation, updates itself automatically, and works on any device with a browser: desktop, tablet, or phone.
This one adds a few conveniences on top of the basics: a live preview of the result while you're still typing, a scientific mode for trigonometry, logarithms, and powers, and a history panel so you never lose a calculation you did earlier in the session.
Basic arithmetic
+ − × ÷ with correct operator precedence
Parentheses
( ) to group and control order of operations
Percentages
% turns a number into its hundredth, usable inline
Powers & roots
x², xʸ, √, 1/x
Logarithms
log (base 10) and ln (base e)
Trigonometry
sin, cos, tan plus inverse (Inv) with a DEG / RAD toggle
Constants
π and e
Live preview
see the result while you're still typing
History
tap the clock icon to revisit and reuse past results
Addition & subtraction
Multiplication & division
Percentages
Powers & roots
Order of operations
The calculator is fully keyboard-driven — click into it once, then type as you would on any calculator app.
| 0–9 | Enter digits |
| + − ×(*) ÷(/) ^ | Operators |
| ( ) | Open / close parentheses |
| % | Percentage |
| . | Decimal point |
| Enter or = | Evaluate the expression |
| Backspace | Delete the last character |
| Escape | Clear everything (AC) |
You might be interested about the following calculators: Percentage Increase, Percentage Decrease, Percentage Change or Percentage Off.