オンライン電卓
数式入力とプログラマーモード対応の科学電卓
About This Calculator
A versatile online calculator with three modes: Basic for everyday calculations, Scientific for trigonometric and logarithmic functions, and Programmer for hexadecimal, octal, and binary operations.
Calculator Modes
Basic mode supports standard arithmetic operations. Scientific mode adds sin, cos, tan, log, ln, sqrt, power, factorial, pi, and e. Programmer mode supports HEX, DEC, OCT, BIN conversions and bitwise operations (AND, OR, XOR, NOT, shift).
History
Calculation history is saved automatically and persists across sessions. Click the History button to view past calculations. Click any history item to reuse its result.
▶Does the calculator support keyboard input?
Yes, you can type numbers and operators directly. However, for complex expressions, using the on-screen buttons is recommended.
▶Is my calculation history saved?
Yes, history is saved to your browser's IndexedDB and persists across sessions. You can clear history at any time.
▶How do I use programmer mode?
Switch to Programmer mode using the tab. Enter numbers and use the HEX/DEC/OCT/BIN buttons to convert between bases. Use bitwise operators for AND, OR, XOR, and shift operations.