Scientific Calculator
Professional scientific calculator with 40+ functions — trigonometry, logarithms, statistics, base conversions and more. No download needed.
40+ Scientific Functions
🔢 Basic Arithmetic
Addition, subtraction, multiplication, division, percentage, negation and parentheses for complex expressions.
📐 Trigonometry
sin, cos, tan and their inverses (sin⁻¹, cos⁻¹, tan⁻¹). Toggle between degrees and radians with the DEG/RAD badge.
📊 Logarithms & Exponentials
Common log (log₁₀), natural log (ln), and their inverses (10ˣ, eˣ). Powers (xʸ), square root, cube root and nth root.
🧮 Advanced Functions
Factorial (x!), reciprocal (1/x), absolute value (|x|), constants π and e, and parentheses for nested calculations.
💾 Memory Functions
MC (Clear), MR (Recall), M+ (Add to memory), M− (Subtract from memory). Memory indicator shows when active.
⌨️ Full Keyboard Support
Numbers, +, -, *, /, Enter, Escape, Backspace, ( and ) all work from your keyboard.
Common Scientific Values
| Function | Input | Result |
|---|---|---|
| sin(30°) | 30 → sin | 0.5 |
| cos(60°) | 60 → cos | 0.5 |
| tan(45°) | 45 → tan | 1 |
| sin⁻¹(0.5) | 0.5 → 2nd → sin⁻¹ | 30° |
| log(1000) | 1000 → log | 3 |
| ln(e) | e → ln | 1 |
| 10² | 10 → x² | 100 |
| 2¹⁰ | 2 → xʸ → 10 → = | 1024 |
| √144 | 144 → √x | 12 |
| 5! | 5 → x! | 120 |
| |−42| | −42 → |x| | 42 |
| π | π | 3.14159… |
Frequently Asked Questions
Is this calculator free?
Yes, completely free with no registration or download required.
How do I switch between degrees and radians?
Click the yellow DEG/RAD badge in the top-left corner of the display. The status bar also shows the current angle mode.
What does the 2nd button do?
It toggles inverse functions: sin becomes sin⁻¹ (arcsin), cos becomes cos⁻¹, tan becomes tan⁻¹, log becomes 10ˣ, ln becomes eˣ, √x becomes ∛x, and x² becomes x³.
Does it work on mobile?
Yes, fully responsive with touch-friendly buttons optimised for phones and tablets.
How do I use parentheses?
In scientific mode, use the ( and ) buttons to group calculations. For example: (2+3)×4 = 20.
Is my calculation history saved?
Yes, saved locally in your browser. It persists across sessions and can be cleared anytime.
Can I use this for GCSE/A-Level revision?
Absolutely. This calculator covers all functions found on a Casio fx-83/fx-991. Perfect for homework and revision. For actual exams you will need a physical calculator.