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📖 How to Use the Calculator
1
Click or type
Use mouse/touch to click buttons, or use keyboard: 0–9, +, −, *, /, Enter (=), Backspace, Escape (clear).
2
Chain calculations
Press = to get a result, then continue with an operator (+, −, ×, ÷) to chain calculations.
3
Memory functions
MS = Memory Store, MR = Memory Recall, M+ adds to memory, M− subtracts, MC clears memory.
4
Special functions
√x = square root, x² = square, 1/x = reciprocal, ± = toggle sign, % = percentage.
Keyboard Support
Full keyboard navigation. No mouse needed for fast calculations.
History Log
Every calculation is saved. Click any history item to reuse the result.
Memory (M+/M−)
Store and recall values across multiple calculations.
Percentage
100 × 15% = 15. Works naturally in context of current calculation.
Need more? Try the Scientific Calculator →