Scientific Calculator
Advanced scientific calculator with trigonometric, logarithmic, and algebraic functions.
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All calculations run locally in your browser using a recursive descent parser. No data is sent to any server. Toggle between DEG (degrees) and RAD (radians) for trigonometric functions.
Whether you are solving trigonometric equations, computing logarithms, or performing everyday arithmetic, our free online scientific calculator gives you the power of a Casio-style calculator directly in your browser. From basic addition to complex scientific functions, every keystroke updates in real time and all computation happens locally on your device. No installs, no ads, no data uploads.
How to Use the Scientific Calculator
- Enter your expression — Click number buttons and function keys to build your expression, just like a handheld calculator.
- Choose angle mode — Click the DEG indicator to toggle between degrees (DEG) and radians (RAD) for trigonometric functions.
- Press = — Hit the equals button to evaluate. The result appears on the display's second line.
- Use memory — Store, recall, add, and subtract values with MC, MR, M+, and M- buttons.
- Review history — Click the History button to see your last 10 calculations.
Available Functions
- Trigonometry:
sin, cos, tan and their inverses sin⁻¹, cos⁻¹, tan⁻¹ with DEG/RAD mode
- Logarithms:
log (base 10) and ln (natural log)
- Powers & Roots:
x², x³, xⁿ, square root (√), cube root (∛)
- Other:
factorial (n!), percentage (%), sign toggle (±), constants π and e
Key Features
- Casio-Style Layout
Familiar key arrangement for quick, muscle-memory-driven use.
- DEG / RAD Toggle
Switch between degrees and radians for trig functions.
- Memory Functions
Store and recall values with MC, MR, M+, and M-.
- Calculation History
Review your last 10 expressions and results.
- Error Detection
Clear error messages for invalid expressions and division by zero.
- 100% Private
Custom recursive descent parser. No eval. Zero data leaves your device.