How to use the scientific calculator
Click the keys or type on your keyboard to build an expression. The display shows the full expression on the top line and a live preview of the result below it, so you can spot mistakes before you press equals. Operators follow the standard order of operations: brackets first, then powers and roots, then multiplication and division, then addition and subtraction. Missing closing brackets are added automatically, and you can write implied multiplication such as 2π or 3(4+5).
Functions explained
- sin, cos, tan and their inverses work in degrees or radians – switch with the DEG/RAD toggle.
- x², xʸ raise to a power; √, ∛, ʸ√x take square, cube and any root.
- ln is the natural logarithm (base e); log is base 10. eˣ and 10ˣ are their inverses.
- n! is the factorial of a whole number, e.g. 5! = 120.
- % divides the preceding value by 100.
- EXP enters scientific notation: 6.02 EXP 23 means 6.02 × 10²³.
- MC, MR, M+, M− clear, recall, add to and subtract from memory.
- Rnd inserts a random number between 0 and 1.
Order of operations
Expressions are parsed exactly as written in mathematics. For example 2 + 3 × 4 = 14, not 20, and −3² = −9 because the power is applied before the minus sign. Use brackets whenever you want to be explicit – (−3)² = 9.
Accuracy
Results are computed with double-precision floating-point numbers and displayed to 12 significant digits, which removes tiny rounding artifacts such as 0.1 + 0.2 = 0.30000000000000004. Very large or very small values switch automatically to scientific notation. Undefined operations, such as tan 90° or the factorial of a negative number, show an error instead of a misleading value.
Need a specialized tool instead? Try the percentage, fraction or standard deviation calculators.
Frequently asked questions
Does the calculator use degrees or radians?
Degrees by default. Switch to RAD using the toggle above the display. Inverse functions return angles in the selected unit.
How do I calculate a root other than square or cube root?
Enter the number, press the ʸ√x key and then the root index. For example 32 ʸ√x 5 = 2.
Can I use my keyboard?
Yes. Type digits and + − * / ^ ( ) ! %, press Enter for equals, Backspace to delete and Esc to clear.
What does the Ans key do?
Ans recalls the result of the last calculation, so you can chain operations. Pressing an operator right after a result continues from it automatically.