Scientific Calculator
Full-featured scientific calculator with sin, cos, tan, log, memory and history.
About this scientific calculator
This free online scientific calculator handles everything a basic calculator does β addition, subtraction, multiplication and division β plus the advanced functions you need for algebra, trigonometry, statistics and science: exponents, roots, logarithms, trigonometric functions and constants such as Ο and e. It runs entirely in your browser, so calculations are instant and nothing you type is stored or sent anywhere.
Key functions explained
| Function | What it does |
|---|---|
| sin, cos, tan | Trigonometric ratios of an angle. Use the DEG/RAD toggle to choose degrees or radians. |
| log, ln | Base-10 logarithm and natural logarithm (base e). Inverses of 10Λ£ and eΛ£. |
| xΚΈ, β | Raise a number to any power, or take its square or nth root. |
| Ο, e | The constants pi (β 3.14159) and Eulerβs number (β 2.71828). |
| M+, Mβ, MR | Memory store, subtract and recall β keep a running value while you work. |
Degrees vs. radians
Trigonometric functions can interpret an angle in either degrees (a full circle = 360Β°) or radians (a full circle = 2Ο β 6.283). A common source of wrong answers is having the calculator in the wrong mode β for example, sin(90) equals 1 in degree mode but roughly 0.894 in radian mode. Always check the DEG/RAD indicator before computing trigonometric values.
Order of operations
The calculator follows the standard order of operations (PEMDAS/BODMAS): parentheses first, then exponents, then multiplication and division left to right, then addition and subtraction. When in doubt, add parentheses to make your intended grouping explicit β for instance, write (3 + 4) Γ 2 rather than relying on mental precedence.
Tips for accurate results
- Use the history panel to review and reuse previous results instead of re-typing them.
- For repeated calculations, store intermediate values in memory (M+) to avoid rounding errors from copying numbers by hand.
- Keyboard input is supported β type numbers and operators directly for faster entry.
- Switch to radian mode when working with calculus or physics formulas, which almost always assume radians.
Frequently asked questions
Is this scientific calculator free?
Yes, completely free with no sign-up. It runs in your browser, so there is nothing to install.
Does it support trigonometry and logarithms?
Yes. It includes sin, cos, tan, log, ln, exponents, roots and constants like Ο and e, with a degrees/radians toggle.
Can I use my keyboard to type calculations?
Yes. You can type numbers and operators directly for faster entry, and review previous results in the history panel.
Why is my trig answer wrong?
Check whether the calculator is in degrees or radians mode β using the wrong mode is the most common cause of unexpected trigonometric results.