About Comzip Calculators

Comzip Calculators is a free site that brings together the calculators you end up needing at some point in everyday life — Korean age, salary, taxes, real estate, and more. Instead of searching around for a calculator with the right assumptions every time, you can run the calculation here and see exactly how the result was derived.

Why it exists

Every time I needed to calculate take-home pay, acquisition tax, or my Korean age, I kept running into sites cluttered with ads, calculators with unclear methodology, or pages that were awkward to use on mobile — so I started building my own. This is an independently run side project, and the number of calculators keeps growing.

How it's run

No sign-up — everything runs in your browser. Values you enter are never sent to or stored on a server; they're processed entirely on your device. See the Privacy Policy for details.
Calculations cite their basis. Tax and legal calculators list the specific statute and the date it was last checked at the bottom of the page.
Korean and English are both supported. New calculators are built with both language versions from the start.

What's covered right now

24 calculators across 4 categories: Salary & Benefits (5), Real Estate (10), Investing (2), Everyday Life (7). Browse the full list by category or search on the homepage.

Contact

If a result looks off, a law has changed, or you'd like to see a new calculator added, let me know.

Email: comzip@gmail.com

All results are for reference only and carry no legal effect. Before filing, paying, or processing payroll, always confirm with the relevant authority (National Tax Service, Hometax, Ministry of Employment and Labor, etc.).