About Calcmemo
It works out the number, then explains how to read it in Korea.
A correct number is not always a useful answer. An 84㎡ apartment is 25.41 pyeong by direct conversion, but it is commonly advertised as a “32-pyeong” home. A Korean age can mean three different figures. Calcmemo explains those conventions instead of leaving a bare result on the screen.
The English section currently has 10 calculators, written for people dealing with Korean units, bills, contracts, and public rules in English. They are separately written rather than mechanically translated.
How calculations are checked
Calculation functions have automated regression tests, including boundary cases where people commonly make mistakes: fee bands, progressive electricity tiers, leap days, age transitions, and statutory minimums and maximums.
Where a result depends on a law, tariff, or annual rate, the page names its basis, links to the issuing authority, states when the implementation was last compared with that source, and describes cases the calculator does not decide.
A check date is not a guarantee that an authority has made no later change. For a filing, contract, benefit claim, or other consequential decision, follow the responsible authority's current determination.
Who runs it
Calcmemo is built, maintained, and source-checked by one operator. The site started in August 2026 after repeatedly having to decode the same apartment sizes, bills, and administrative rules.
The operator does not claim to be a lawyer, tax adviser, accountant, benefits officer, or medical professional. The site documents its sources and limitations so readers can check the work; it does not replace advice or an official decision.
Corrections are the priority. If a result, explanation, source, or check date looks wrong, email [email protected] with the page, inputs, result, and source you believe applies. See the contact page for details.