How to use it
Tap the keys or type on your keyboard, then press = to calculate. The keys available are sin, cos, tan, π, e, x², xʸ, √, log (base 10), ln (natural log), n!, %, EXP (× 10 to the power n), Ans (last answer) and ± (change sign).
- The angle mode starts in DEG. Tap DEG to switch to RAD.
- Order of operations: brackets first, then powers and factorials, then × ÷, and finally + −. The minus sign in front of a number applies after powers, so −2² = −4. Implied multiplication (e.g. 2π or 2(3+4)) is done before × and ÷, as on most school scientific calculators, so 1÷2π = 0.159.
- Missing closing brackets are added automatically.
- n! works for whole numbers from 0 to 170.
- % divides by 100, so 200 × 10% = 20.
- Keyboard: digits, + − * / ^ ( ) . % !, Enter or = to calculate, Backspace to delete one character and Esc to clear. This works while the calculator is focused.
- On phones, tap fn to show the scientific keys.
Worked examples
| Expression | Result |
|---|---|
| 2+3×4 | 14 |
| sin(30) in DEG | 0.5 |
| 2^10 | 1024 |
| 5! | 120 |
| log(1000) | 3 |
| 200×10% | 20 |
Understanding the results
“Syntax error” (Ralat sintaks) means the expression is incomplete, for example 2+ with no number after it. “Math error” (Ralat matematik) means the calculation cannot be done: dividing by zero, the square root of a negative number, log or ln of zero or a negative number, tan 90°, or a result that is too large.
History keeps the last 20 calculations in this browser only. Tap any entry to load it again.