Pockett Calculator uses JavaScript's built-in Math library which provides double-precision floating-point arithmetic. This means calculations are accurate to about 15-17 significant digits, which is more than sufficient for most scientific, engineering, and everyday calculations.

No installation required! All calculators on Pockett Calculator are web-based and run directly in your browser. Simply visit the page and start calculating. No downloads, no registration, and no plugins needed.

Yes! All calculators are fully responsive and optimized for mobile devices. Whether you're on a smartphone, tablet, laptop, or desktop, you'll get a seamless experience with touch-friendly buttons and adaptive layouts.

Yes, absolutely! All calculators are 100% free to use with no hidden costs, subscriptions, or premium features. We support the service through non-intrusive advertising while keeping all functionality completely free for everyone.

The basic calculator handles standard arithmetic operations (addition, subtraction, multiplication, division). The scientific calculator includes advanced functions like trigonometry (sin, cos, tan), logarithms, exponents, square roots, and more - perfect for students, engineers, and professionals.

Yes! You can use your keyboard's number pad and operator keys for faster input. Number keys (0-9) input digits, +/-/* for operations, Enter for equals, and Escape or C for clear.