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Use a fast four-function calculator with percentage, backspace, keyboard support, and local history.
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Scientific calculator
Evaluate scientific expressions with DEG/RAD modes, trigonometry, logarithms, powers, roots, constants, memory, and history.
On this page
Result5
Calculator controls
How to calculate
Evaluate scientific expressions with DEG/RAD modes, trigonometry, logarithms, powers, roots, constants, memory, and history.
Supports +, −, ×, ÷, powers, roots, parentheses, sin, cos, tan, inverse trigonometry, log, ln, π, e, factorial, reciprocal, and scientific notation.
Worked example
Expression: sqrt(3^2+4^2); Angle mode: deg.
Result: 5 .
Assumptions and limits
Expressions are parsed with an allow-listed mathematical grammar. No direct code evaluation is used.
Results are rounded for display; calculations use unrounded values. Read our calculation methodology.
Understanding the result
The result evaluates the expression using standard operator precedence and the selected DEG or RAD mode. Parentheses state the order explicitly.
When this tool is useful
Check arithmetic, powers, roots, logarithms, factorials, and trigonometric expressions with touch or keyboard input.
Understanding your inputs
| Input | What to enter |
|---|---|
| Expression | Enter the value in the format shown. |
| Angle mode | Enter one of the available options. |
Frequently asked questions
Does trigonometry use degrees or radians?
Choose DEG for degree values such as sin(30), or RAD for radian values such as sin(pi/6). The active mode is shown on the calculator display.
Why is -2^2 equal to -4?
Exponentiation is evaluated before the leading minus. Enter (-2)^2 to square the negative number and obtain 4.
Is calculation history uploaded?
No. Scientific-calculator history and memory stay in this browser and can be cleared.