🧮 Calculator
DEG🕒 History
No calculations yet.
💡 Quick Tips
- 📐 Toggle DEG / RAD before using sin, cos or tan — it changes how angles are interpreted.
- 🔁 Press 2nd to switch trig buttons to their inverse (sin⁻¹, cos⁻¹, tan⁻¹) and √ to ∛.
- ⌨️ Your keyboard works too — numbers, + − × ÷, ^, ( ), !, %, Enter (=), Backspace and Esc (clear).
- 🕒 Tap any line in History to reload that result back into the calculator.
- 🔒 Everything runs locally in your browser — nothing you type is ever sent anywhere.
How to Use the Scientific Calculator
Type or tap an expression and press = to get the answer, following the normal order of operations, so 2 + 3 × 4 gives 14. Set DEG or RAD before using sin, cos or tan, press 2nd for inverse functions and cube roots, and use Ans to reuse your last result. It all runs in your browser.
Functions and Keys
| Key | What it does | Example |
|---|---|---|
| sin, cos, tan | Trigonometry in degrees or radians | sin(30) = 0.5 in DEG |
| 2nd | Switches to sin⁻¹, cos⁻¹, tan⁻¹, x³ and ∛ | sin⁻¹(0.5) = 30 in DEG |
| log, ln | Base-10 and natural logarithms | log(1000) = 3, ln(2) ≈ 0.693 |
| x², x^y, √ | Squares, any power, square roots | 2^10 = 1,024, √16 = 4 |
| n! | Factorial | 5! = 120 |
| EXP | Scientific notation (×10ⁿ) | 5 EXP 3 = 5,000 |
| Ans | Inserts your last answer | Ans × 2 |
| M+, M−, MR, MC | Add to, subtract from, recall and clear memory | MR recalls the stored value |
Order of Operations
The calculator follows the standard order: brackets first, then powers, then multiplication and division, then addition and subtraction (often remembered as PEMDAS or BODMAS). Use brackets to change it: (1 + 2) × 3 = 9, while 1 + 2 × 3 = 7.
How the % Key Works
The % key divides the number before it by 100, so 50% is 0.5 and 10 + 10% gives 10.1. To add 10% to a number, multiply by 1.1 instead, or use the percentage calculator for percentage questions.
Keyboard Shortcuts
You can type directly: numbers, + − × ÷, ^ for powers, brackets, ! for factorial and %, with Enter for equals, Backspace to delete and Esc to clear. Tap any line in the history panel to load that result again.
Degrees or Radians?
Use DEG for everyday angles measured in degrees, such as triangle problems. Use RAD for calculus and most physics formulas, where angles are in radians (π radians = 180°). If sin(30) gives −0.988 instead of 0.5, you're in radian mode.
Your calculations stay in your browser, and history clears when you close the page. Most exams only allow an approved physical calculator, so use this for homework and practice. Converting units? Try the unit converter, or count words in an essay with the word counter.
How the Scientific Calculator Works
The calculator reads your whole expression and evaluates it with a parser that follows the standard order of operations: brackets first, then powers and roots, then multiplication and division, then addition and subtraction. Missing closing brackets are added for you. Functions such as sin, log, ln and square root are computed with JavaScript's built-in maths, which works to about 15 to 17 significant digits, the same double-precision standard most calculators and spreadsheets use.
Who Uses the Scientific Calculator?
- Students: trigonometry, logarithms and powers for maths, physics and chemistry homework.
- Engineers and technicians: quick checks without opening heavy software.
- Anyone without a calculator: it works on a phone or laptop with no download.
How the Scientific Calculator Saves You Time
Typing a whole expression at once avoids the step-by-step entry of a basic calculator and the mistakes that come with it, and the result is shown with the expression so you can check it.
Frequently Asked Questions
Does this calculator use degrees or radians?
What does the 2nd button do?
Does it follow the order of operations?
What do EXP and Ans do?
Does it have memory buttons?
Can it calculate combinations (nCr)?
Is my calculation history saved?
Last updated: September 2026