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Scientific Calculator
A full scientific calculator that works with your keyboard or by tapping. Type a whole expression like 2sin(30)+√16 and see the answer as you type; press Enter or = to save it to history.
Calculator
DEG2nd
History
What it can do
- Arithmetic with correct order of operations (brackets, powers, × ÷, + −).
- Trigonometry: sin, cos, tan and their inverses (press 2nd), in degrees or radians.
- Logarithms: ln, log (base 10), log2, plus eˣ and 10ˣ.
- Powers and roots: x², xʸ, √, ∛ and 1/x.
- Combinatorics: n!, nCr(n, r) and nPr(n, r).
- Percent:
200×15%= 30. - Ans reuses your last result; tap any history line to load it again.
Typing tips
You can type * or x-free shortcuts: 2pi, 3(4+5) and 2sin30 all work (multiplication is implied). Use ^ for powers, sqrt() for square roots and a comma inside ncr(10,3). Missing closing brackets are added for you when you press =.
Order of operations
The calculator follows the standard convention (BODMAS / PEMDAS): brackets first, then powers (evaluated right to left, so 2^3^2 = 2⁹ = 512), then multiplication and division, then addition and subtraction, left to right. A leading minus applies after the power: −2^2 = −4, while (−2)^2 = 4.
Handy values
| Expression | Result |
|---|---|
| sin(30°) | 0.5 |
| cos(60°) | 0.5 |
| tan(45°) | 1 |
| log(1000) | 3 |
| ln(e) | 1 |
| 10! | 3,628,800 |
| ncr(52,5) | 2,598,960 (poker hands) |
| √2 | 1.41421356237 |
Frequently asked questions
Why does sin(90) give 0.894 instead of 1?
The calculator is in radian mode. Tap RAD to switch to DEG.
How accurate is it?
Results are computed in double precision and shown to 12 significant digits. Tiny rounding residue (like 1.2e−16 for sin 180°) is cleaned up to 0.
Does it work offline?
Yes — once the page has loaded, everything runs in your browser.