Notepad Calculator
Notepad Calculator
Notepad Calculator is a free, minimal online calculator that works like a plain text notepad — no buttons, no number pad, no equals key. Just open it and start typing. Your math expressions are evaluated live as you type, with results shown inline.
It's the fastest notepad calculator on the web — perfect for quick calculations, multi-step arithmetic, percentage splits, and chained computations without ever leaving your keyboard.
Features:
- Live results as you type — no Enter needed
- Multi-line calculations with
Enter - Percentage support:
20% of 500,15% off 80 - Answer chaining: start a line with
+,-, etc. - Dark & Light mode, print-ready output
- Works offline — no server, no tracking
Developed by vinish.dev
Set Currency Symbol
Choose a symbol to display next to your results.
Or type a custom symbol:
How to Use
Type any math expression on a blank line to get instant results. The calculator is smart enough to extract math from natural language sentences.
Input Features & Formatting:
- Basic Math:
2 + 2,10 / 5,4 * 3 - Percentages:
20% of 500,15% off 80 - Powers:
2 ^ 3,4 squared,the power of 2 - Natural English:
divide 100 by 2,split 1200 in 4,multiply 5 by 4,subtract 5 from 10,add 5 to 10 - Chaining: Start a new line with an operator like
+ 10or* 2to calculate based on the previous line's result. - Context Extraction: Write sentences!
I have 500 and tax is 20%safely evaluates to100by ignoring the surrounding text.
App Controls (Top Bar):
- Print: Opens a clean, ink-friendly print view of all your calculations (hides empty rows and buttons).
- Clear: Wipes your entire notepad and resets the calculator back to a blank slate.
- Mode Toggle: Switches between Light and Dark mode. (Click the Sun/Moon icon).
Running Total:
Look at the bottom right corner of the screen! The calculator automatically sums up the final results of every valid row in your notepad, giving you a live running total of all your calculations.