Current for 2026•As of: July 2026

Notepad Calculator calculate like on a notepad.

Multiple lines, named values, subtotals and percentages – every line with an instant result

FreeNo sign-upGDPR-compliant

Notepad Calculator

Calculate like on a notepad: multiple lines, named values, subtotals and percentages – every line with an instant result.

Sum of line items: 4.100
How it works
  • rent: 850 – name a line and store it as a value
  • rent + electricity – reuse named values in later lines
  • total – subtotal of the block (an empty line starts a new block)
  • prev – previous result
  • 20% of 80, 80 + 20%, 80 - 20% – percentages in plain words
  • # Text – comment/heading
  • 1234.50 or 1234,50 – both decimal formats and currency symbols like € are understood
Just need a quick calculation? Simple calculator

Notepad calculator: calculating with text and variables

The Soulver-style notepad calculator for quotes, budgets and mental math

A notepad calculator combines a text editor with a calculator: you write several lines just like on a notepad, and any line containing a number or calculation is evaluated instantly. The result appears right next to it, without pressing Enter or using formula syntax. Unlike a classic calculator, the entire calculation stays readable as text – ideal for quotes, budgets or side calculations you want to revisit later.

The heart of it is named values: write rent: 850 to store the value 850 under the name "rent". In any following line, you can use this name like a variable, e.g. rent + electricity – the calculator automatically replaces the names with the previously calculated numbers. This turns a loose list of numbers into a traceable calculation with meaningful names instead of anonymous intermediate results.

For subtotals, the reserved word total is available: it adds up all the numbers in the current block – an empty line automatically starts a new block, so several partial calculations stay cleanly separated. With prev you can access the result of the immediately preceding line, for example to calculate a chain of surcharges one after another.

Percentages, comments and quotes

How to use the notepad calculator for real-world use cases

Percentage calculations can be written in plain language, without any formula: 20% of 80 calculates the share (16), 80 + 20% increases a value directly by the given percentage, and 80 - 20% reduces it the same way. This lets you calculate VAT, discounts or markups for a quote directly in the relevant line, instead of working it out separately.

Use #-comments to structure longer notes: lines starting with "#" are shown as a heading and not included in the calculation – for example to split a quote into "Design", "Development" and "Copywriting". Plain text lines without any digits don't cause an error either; they're automatically recognized as free text. Numbers can be written in German number format – a decimal comma and thousands dots like "1.234,50" are interpreted correctly, and currency symbols like "€" or "EUR" don't interfere with the calculation.

The notepad calculator runs entirely client-side in the browser – your notes are never transmitted to a server, which automatically makes it GDPR-compliant. The share button optionally lets you send a calculation sheet as a link; if you'd rather keep your notes to yourself, simply leave that feature unused.

Frequently asked questions about the notepad calculator

Variables, subtotals, percentages and privacy

Write a name followed by a colon or equals sign, then the number or calculation, e.g. "rent: 850". The value is stored and can be referenced by name in any following line, without typing the number again.

Just write the name in an expression, e.g. "rent + electricity". The notepad calculator automatically replaces the names with the previously calculated values and evaluates the line instantly.

"total" gives the subtotal of all numbers in the current block – an empty line starts a new block. "prev" gives the result of the immediately preceding line, which is useful for chained calculations.

The notepad calculator understands plain-language percentage phrasing: "20% of 80" calculates the share (16), "80 + 20%" increases a value by the given percentage, and "80 - 20%" decreases a value by the given percentage. This lets you work out VAT, discounts or markups directly in the line.

Yes. Lines starting with "#" are treated as a comment or heading and are not included in the calculation. Plain text lines without any digits also don't cause an error – they're simply skipped, for example to structure a quote.

No. The notepad calculator runs 100% locally in your browser – no data is sent to a server. Your input is only stored locally (so it's still there on your next visit) and can be deleted at any time via "Clear". This is fully GDPR-compliant.

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