Scientific Calculator Free Online Calculator
History (tap a line to use it again)
Private by design: every calculation runs in your own browser. Nothing is sent to QuickOnlineTips or stored.
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About this tool
This free scientific calculator works online in your browser like a classic handheld one: trigonometry in degrees or radians, logarithms, powers and roots, factorials, percentages, brackets and memory of your last answer. Tap the keys or type on your keyboard, and see the answer preview as you go.
Quick answer: Type your sum with the keys or your keyboard, then press = or Enter. Use DEG or RAD to switch angle units, and 2nd for inverse functions such as sin⁻¹, eˣ, 10ˣ and cube roots. Tap a line in History to use it again.
What each key does
| Key | What it does | 2nd function |
|---|---|---|
| sin, cos, tan | Trigonometry (uses DEG or RAD) | sin⁻¹, cos⁻¹, tan⁻¹ |
| ln, log | Natural log and log base 10 | eˣ and 10ˣ |
| √, x², xʸ | Square root, square, any power | Cube root, cube, any root |
| x!, 1/x, %, |x| | Factorial, reciprocal, percent, absolute value | |
| EXP | Times 10 to the power, e.g. 3 EXP 8 = 300,000,000 | |
| Ans, ± | Last answer, change sign |
Order of operations
The calculator follows the usual maths order: brackets first, then powers and roots, then multiplication and division, then addition and subtraction. So 2 + 3 × 4 = 14 and (2 + 3) × 4 = 20. Powers are worked from right to left, so 2^3^2 = 2^9 = 512, and −2² = −4. Missing closing brackets are added for you when you press =.
Keyboard shortcuts
- Numbers, + − * / ^ ( ) ! % and the decimal point type straight in.
- Enter or = works out the answer, Backspace deletes, Esc clears.
Working with data? The standard deviation calculator and average calculator do the statistics for you, and the fraction calculator keeps answers as fractions.
FAQ
Why does sin(30) not give 0.5?
Check the mode. In DEG mode sin(30) = 0.5. In RAD mode the 30 is read as radians and the answer is about −0.988. Press DEG/RAD to switch.
Why does 0.1 + 0.2 show 0.3 here but not in some apps?
Computers store decimals in binary, which can leave tiny errors. This calculator rounds the display to 12 significant digits, so you see the answer you expect.
Can I use it in an exam?
Only if your exam allows online tools. Many exams require an approved handheld calculator, so check your exam rules first.
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