Scientific Calculator
Type a calculation or tap the keys: trigonometry in degrees or radians, logarithms, powers, roots, factorials, permutations and combinations, π, e and the previous answer. The answer updates as you type and every result you finish goes into a history you can reuse.
History (this tab only)
What you can type
| Type | Meaning | Example |
|---|---|---|
+ − × ÷ or + - * / | Add, subtract, multiply, divide | 2 + 3 * 4 = 14 |
^, ² | Power (worked right to left) | 2^3^2 = 512 |
sqrt( ) or √, cbrt( ) | Square and cube root | √81 = 9 |
sin cos tan, asin acos atan | Trigonometry in the selected angle unit | sin(30) = 0.5 in DEG |
sinh cosh tanh | Hyperbolic functions | cosh(0) = 1 |
log( ), ln( ), log2( ), log(x, b) | Base 10, base e, base 2, any base | log(8, 2) = 3 |
!, nCr( , ), nPr( , ) | Factorial, combinations, permutations | nCr(5, 2) = 10 |
% | Divide by 100 | 15% × 240 = 36 |
π or pi, e, Ans | Constants and the last answer | 2π = 6.28318530718 |
E | Times ten to the power | 3E8 = 300000000 |
abs floor ceil round exp | Absolute value, rounding, e to the power | abs(−7) = 7 |
Keyboard: press Enter to calculate and save to history, Esc to clear. A missing closing bracket at the very end is added for you.
Worked example: the opening calculation
The calculator opens with 2 × (3 + 4)^2 − √81. It is worked in this order:
A second one with angles, in DEG mode: sin(30) + cos(60) = 0.5 + 0.5 = 1. Switch to RAD and the same keys give about −1.940, because 30 and 60 are then read as radians. Mixing up the two modes is the most common reason a calculator answer looks wrong.
Order of operations
The calculator follows the usual order taught as BODMAS, BIDMAS or PEMDAS, with two details that matter in exams:
- Powers before a minus sign.
−3^2is −9, because the 3 is squared first. Type(−3)^2for 9. - Powers from right to left.
2^3^2means 2^(3^2) = 2^9 = 512, not 8^2 = 64.
Multiplication and division share a level and are worked left to right, so 8 ÷ 2 × 4 is 16. A number written straight before a bracket, a constant or a function is multiplied: 2π, 3(4 + 1) and 2sin(30) all work.
Results are rounded to 12 significant figures for display, so 0.1 + 0.2 shows 0.3. In DEG mode, angles such as 30°, 90° and 180° give exact answers: sin(180) is exactly 0 and tan(90) is reported as undefined rather than a huge number.
Frequently asked questions
How do I switch between degrees and radians?
Why is −2^2 equal to −4 and not 4?
What order does the calculator work in?
How do I calculate combinations and permutations?
What do log and ln mean?
Why does 0.1 + 0.2 show 0.3 here when some calculators show 0.30000000000000004?
What this calculator does not do
- Answers are shown to 12 significant figures; very large and very small answers switch to E notation (1.5E20).
- It works with real numbers only - no complex numbers, matrices, unit conversion or symbolic algebra.
- The history and the Ans value are kept only in this browser tab and are cleared when you close it.