A scientific calculator has dozens of buttons that a basic calculator doesn't. Most people use five or six regularly; the rest appear in specific maths or science contexts. This guide covers the functions that come up most often.
The Basics Already on a Standard Calculator
Addition (+), subtraction (−), multiplication (×), division (÷), equals (=), decimal point, positive/negative toggle (±) — these work the same on every calculator.
Common Scientific Functions
Exponents and Roots
| Button | What it does | Example |
|---|---|---|
| x² | Squares the number | 9 x² = 81 |
| xʸ or ^ | Raises to any power | 2 ^ 10 = 1,024 |
| √ | Square root | √144 = 12 |
| ∛ or x^(1/3) | Cube root | ∛27 = 3 |
Brackets
Brackets control the order of operations. Always add brackets to make the intended calculation explicit:
- (3 + 4) × 2 = 14 (not 3 + 8 = 11)
Trigonometry (sin, cos, tan)
These relate angles in a right triangle to the ratio of its sides:
- sin(θ) = opposite ÷ hypotenuse
- cos(θ) = adjacent ÷ hypotenuse
- tan(θ) = opposite ÷ adjacent
Important: check whether the calculator is in Degrees or Radians mode. For most school problems, use Degrees.
Logarithms
| Button | What it does |
|---|---|
| log | Common logarithm (base 10) |
| ln | Natural logarithm (base e) |
| 10ˣ | Inverse of log |
| eˣ | Inverse of ln |
Scientific Notation
Very large or very small numbers use scientific notation: 3.2 × 10⁸ = 320,000,000.
Enter using the EXP or ×10ˣ button: type 3.2, then EXP, then 8.
Memory Functions
| Button | Function |
|---|---|
| M+ | Add to memory |
| M− | Subtract from memory |
| MR | Recall memory |
| MC | Clear memory |
Useful for intermediate calculations you'll need again without retyping.
Order of Operations (BODMAS/PEMDAS)
Calculators follow this automatically, but it's important to know for entering complex expressions:
- Brackets first
- Exponents/roots
- Division and Multiplication (left to right)
- Addition and Subtraction (left to right)
Use Scientific Calculator for quick access to all these functions in the browser. For percentage calculations that often pair with these, see how to calculate percentages quickly.
Factorial and Permutations
The factorial button (n! or x!) calculates the product of all integers from 1 to n: 5! = 1 × 2 × 3 × 4 × 5 = 120. Used in probability and combinations. For example, the number of ways to arrange 4 items = 4! = 24. For choosing r items from n without repetition (combinations), most scientific calculators have a nCr button. These come up in probability questions, seating arrangements, and combinatorics problems. Scientific Calculator includes these alongside the standard functions above.
Avoiding Common Calculator Errors
The most common error on a calculator is missing brackets around a denominator: typing 1 ÷ 2 + 3 gives 3.5 (not 1/5 = 0.2). Use brackets: 1 ÷ (2 + 3) = 0.2. Similarly, 2 ^ 3 × 4 means (2³) × 4 = 32 — if you want 2^(3×4) = 2^12, brackets are essential. Scientific Calculator follows standard order of operations; always add brackets when in doubt about precedence.
