Instant Results
Real-time calculation as you type
Accurate
Proper order of operations always
Keyboard Ready
Full keyboard shortcut support
Scientific Mode
Trig, log, sqrt, and constants
Complete Guide to Online Calculator
Our free online calculator provides both basic and scientific calculation capabilities. Whether you're a student, professional, or everyday user, this tool delivers fast and accurate results directly in your browser โ no download required.
Basic Calculator Functions
Handle all fundamental arithmetic: addition, subtraction, multiplication, and division. Follows PEMDAS/BODMAS order of operations for mathematically correct results every time. The percentage function makes it easy to calculate discounts and tips.
Scientific Calculator Features
Switch to scientific mode for trigonometric functions (sin, cos, tan), logarithms, square roots, and powers. Use constants like ฯ and Euler's number (e) for precise scientific and engineering calculations.
How to Use
- Click number buttons or use your keyboard (0โ9) to input numbers
- Select an operator (+, โ, ร, รท) for your operation
- Press = or Enter to calculate
- Use AC to clear, โซ or Backspace to delete last digit
- Switch to Scientific mode for advanced functions
Keyboard Shortcuts
- 0โ9, . โ Input numbers and decimal
- +, โ, *, / โ Arithmetic operators
- Enter or = โ Calculate result
- Escape or C โ Clear all
- Backspace โ Delete last digit
Frequently Asked Questions
Yes โ 100% free with no registration, no hidden fees, and no usage limits. Use it as many times as you need.
Yes! Fully responsive and optimized for touchscreens. Works perfectly on smartphones, tablets, and desktops.
Yes! Full keyboard support including digits, operators (+, -, *, /), Enter for equals, Escape to clear, and Backspace to delete.
Our calculator uses standard JavaScript math operations following proper PEMDAS/BODMAS order of operations for accurate results every time.
Never. All calculations run entirely in your browser. We don't store, collect, or share any data you enter.
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