Calculator Online
Free online calculator for basic math. Fast, accurate, and works on any device — no downloads needed.
Basic Calculator
No calculations yet
How to Use This Calculator
Enter Numbers
Click the number buttons or use your keyboard to type numbers.
Choose Operation
Select an operation: addition (+), subtraction (−), multiplication (×), or division (÷).
Get Result
Press the equals (=) button or hit Enter to see your result instantly.
About This Online Calculator
Welcome to Calculator Online — a free, easy-to-use calculator that works right in your web browser. Whether you need to quickly add up numbers, calculate a tip, or perform basic math operations, our tool is designed to be fast and reliable.
This calculator supports all four basic arithmetic operations: addition, subtraction, multiplication, and division. It also includes useful features like percentage calculation, sign toggling, and a calculation history so you can keep track of your previous results.
Unlike downloadable calculator apps, this tool requires no installation, no signup, and no personal information. Simply visit this page on any device — desktop, laptop, tablet, or smartphone — and start calculating immediately.
Key Features
- ✅ 100% free — no hidden costs, subscriptions, or paywalls
- ✅ Works on all devices — responsive design for desktop, tablet, and mobile
- ✅ No signup required — start using instantly
- ✅ Keyboard support — use your keyboard for faster input
- ✅ Calculation history — review your previous calculations
- ✅ Dark mode support — automatically matches your system theme
- ✅ Privacy-friendly — no data collected, everything runs in your browser
Keyboard Shortcuts
- 🔢 0-9 — Enter digits
- ➕ + − * / — Arithmetic operators
- ⏎ Enter or = — Calculate result
- ⌫ Backspace — Delete last digit
- 🗑️ Escape — Clear all (AC)
Frequently Asked Questions
Yes, this calculator is completely free. There are no hidden costs, no subscriptions, and no limitations on usage. Use it as much as you need.
Absolutely! This calculator is fully responsive and works perfectly on smartphones, tablets, and any screen size. The buttons are designed to be touch-friendly.
Yes! You can use your keyboard to type numbers and operations. Press Enter or = to calculate, Backspace to delete, and Escape to clear.
Yes. All calculations happen entirely in your browser. We don't collect, store, or transmit any of your data. Your privacy is fully protected.
This calculator uses JavaScript's native floating-point arithmetic, which provides 15-17 significant digits of precision — more than enough for everyday calculations.