About Scientific Calculator
A full scientific calculator for trigonometry, logarithms, powers, roots, and factorials, with degree/radian modes and memory. It safely evaluates whole expressions with correct operator precedence.
How to Use
- Type or click an expression using the keypad.
- Toggle DEG/RAD for trigonometric functions.
- Use inv for inverse functions (sin⁻¹, eˣ, 10ˣ) and the memory keys as needed.
- Press = to evaluate; use Ans to reuse the previous result.
Why Use This Tool?
- Accurate — built on precise, well-tested mathematical formulas.
- Instant — all calculations happen client-side for zero latency.
- Private — no data is sent to any server; your information stays on your device.
- Free — no sign-up, no limits, no hidden costs.
Frequently Asked Questions
Does it follow order of operations (BODMAS/PEMDAS)?
Yes. Expressions are parsed with correct precedence — exponents before multiplication/division before addition/subtraction — and parentheses override the order, so 2 + 3 × 4 correctly gives 14.
What is the difference between degrees and radians mode?
It changes how trigonometric functions interpret angles. In DEG, sin(30) = 0.5; in RAD, sin(π/2) = 1. Use the DEG/RAD toggle to switch.
How do I calculate a factorial or power?
Use the x! key for factorials (5! = 120) and the xʸ (or ^) key for powers (2^10 = 1024). The √ key and x² are also available.