A notepad calculator for Windows
Updated by Adrian Viziteu. Examples from the syntax reference, checked on 15 October 2026 with Germany's 19% VAT. Currency results change with the market.
Ratio turns a simple note into a powerful calculator. Write a line like “84 eur / 3”, and the answer appears on the right as you type. It runs on Windows 10 and 11, with the same engine as Ratio for Mac.
What a sheet looks like
| dinner = 84 eur / 3 | €28 |
| dinner in usd | $31.41 |
| 5 km in mi | 3.11 mi |
| 15:00 London in Tokyo | Thu 23:00 |
| 1000 + VAT | 1,190 |
| 1 mar 2027 + 10 working days | Mon, 15 Mar 2027 |
| loan 200k at 5% for 30 years | 1,073.6432 |
Each line is a calculation. Name a value (“dinner”) and use it further down, or refer to an earlier line with L3 or prev.
Why not the Windows Calculator?
The Windows Calculator shows one number at a time, then forgets it. A Ratio sheet keeps every step in view, so you can change one line and watch the rest follow. And it knows things no keypad calculator does:
- 160+ live currencies and major cryptocurrencies, refreshed every few hours, still working offline with the last rates
- 150+ units: “6 ft in cm”, “100 f in c”, “1 gib in mib”
- Dates and time zones: “25 dec 2026 + 3 weeks”, “15:00 London in Tokyo”, working days that skip public holidays
- VAT by country (“1000 + VAT”, “1190 without VAT”), margins, loans and
pmt,npv,irr - Equations, integrals, statistics, hex and binary, colours and
chmod 755 - Calculations in English, Romanian, German, French, Spanish and Italian
Install
- Download Ratio-Setup.exe.
- Open it. If Windows says it protected your PC, click More info, then Run anyway.
- Ratio opens and is free for 7 days. New versions download by themselves and install when you restart.
Needs Windows 10 or 11, 64-bit. iCloud sync, sharing a sheet as an image or link, version history, import and export, Liquid Glass and the ratio Terminal command are Mac only for now.
Price
$9.99 once for one computer, $14.99 for two and $19.99 for three. No subscription, updates included, and one license can mix Windows, Linux and Mac computers.
Download Ratio for Windows · free for 7 days
Questions
Is there a Soulver or Numi-style calculator for Windows? Yes. Ratio works the same way, plain text lines with the answer beside each one, and runs on Windows 10 and 11. See Ratio as a Soulver alternative.
Does Ratio for Windows work offline? Yes. Everything is calculated on your PC. Exchange rates need a connection to refresh, and offline Ratio uses the last rates it downloaded.
Is it the same app as on the Mac? It uses the same calculation engine, so every line gives the same answer. iCloud sync, sharing a sheet as an image or link, version history, import and export, Liquid Glass and the ratio Terminal command are Mac only for now.
Can I use one license on Windows and on a Mac? Yes. A 2- or 3-computer license can mix Windows, Linux and Mac. To move a license, click “Deactivate this PC” in Ratio Pro and enter the key on the other computer.