Standard Calculator
A clean everyday calculator with memory, percentage and sign toggle.
TL;DR — Standard Calculator: A standard calculator handles the four basic arithmetic operations (+, −, ×, ÷) plus percentage and sign toggle, with memory (M+, M−, MR, MC). Cal44's standard calculator is keyboard-friendly and works offline — no signup, no analytics.
What is the Standard Calculator?
A standard calculator handles the four basic arithmetic operations (+, −, ×, ÷) plus percentage and sign toggle, with memory (M+, M−, MR, MC). Cal44's standard calculator is keyboard-friendly and works offline — no signup, no analytics.
How to use the Standard Calculator
- Tap or type numbers and operators.
- Use M+ / M− to add or subtract the displayed value from memory.
- MR recalls the memory value; MC clears it.
- Press % to convert the displayed value to a fraction (e.g. 25 → 0.25).
- Press = or Enter to evaluate.
Formula
Supports: + − × ÷ % ± M+ M− MR MC
Keyboard: number keys, +, -, *, /, Enter (=), Esc (clear), Backspace.
Worked example
(12 + 8) × 4 ÷ 5 = 16. Sequence: 1, 2, +, 8, =, ×, 4, =, ÷, 5, =.
Frequently asked questions
Does the calculator support keyboard input?
Yes. Number keys, +, -, *, /, Enter, Escape and Backspace all work as expected.
How do I clear the calculator?
Tap C (clear current entry) or AC (clear all). On keyboard, Escape clears.
How does the percentage button work?
It divides the current displayed value by 100. 25 becomes 0.25 — useful for chaining into multiplication (e.g. 80 × 25 % to get 20).
Can I see the calculation history?
The current expression is shown above the display so you can verify the input sequence before pressing equals.
Is there a scientific mode?
Yes — open the Scientific Calculator on Cal44 for trigonometry, logarithms, powers and constants.