A free online scientific calculator for trig, logarithms, powers, roots, factorials and constants — with degree/radian mode and correct order of operations. No download or sign-up.
Free online scientific calculator. Supports + − × ÷, powers, roots, π, e, trigonometry (degrees or radians), logarithms, factorials and parentheses.
Use this free scientific calculator online for everything from basic arithmetic to trigonometry, logarithms, powers and roots. Tap the keys to build an expression, then press equals — no download or sign-up needed.
This online scientific calculator handles addition, subtraction, multiplication and division, plus powers, square roots, trigonometry, logarithms, factorials, π, e and parentheses. It follows the correct order of operations and works in degrees or radians.
| Key | Does |
|---|---|
| sin, cos, tan | Trigonometry (toggle DEG/RAD). |
| ln, log | Natural log and base-10 log. |
| x^y, x² | Powers and squares. |
| √ | Square root. |
| x! | Factorial. |
| π, e | The constants pi and Euler’s number. |
| % | Percent (divides by 100). |
| Ans | Reuses your last answer. |
The calculator respects standard precedence (often remembered as BODMAS / PEMDAS): parentheses first, then exponents, then multiplication and division, then addition and subtraction. So 2 + 3 × 4 = 14, not 20.
Trigonometric functions depend on the angle mode. In DEG, sin(30) = 0.5; switch to RAD and the same functions expect radians (sin(π/6) = 0.5). Use the DEG/RAD button to toggle.
Yes, it's completely free, works online in your browser, and needs no download or sign-up.
Tap the DEG/RAD button above the keypad. In DEG, sin(30) = 0.5; in RAD, the functions expect radians instead.
Standard BODMAS/PEMDAS: parentheses, then exponents, then multiplication and division, then addition and subtraction. So 2 + 3 × 4 equals 14.
Yes — sin, cos and tan (plus their inverses internally), natural log (ln) and base-10 log are all supported, along with powers, roots and factorials.
Press the Ans key to insert your previous result into a new calculation.
Yes, the keypad is touch-friendly and adapts to small screens, so it works on phones, tablets and desktops.