About Ajamall Health Calculators

Ajamall Health Calculators is a family site of the Ajamall portal, which explains Korean government benefits, finance and everyday information in Korean. Here we collect common health calculations in English, Japanese and Korean.

Why we built it

There are many health calculators, but many do not say which equation or standard they use. The same BMI can fall in different categories depending on the organization, and the same calorie calculation changes with the equation behind it. So this site does not just show a result. For every calculator it names which organization's document each formula or value comes from and the date we read it.

What this site does

• It calculates or looks up BMI, daily energy (calorie) needs, pregnancy due dates, sleep cycles and water intake figures.
• For every calculator it lists the source of each formula or reference value and the date we opened and read it. The full list is on the Sources page.
• Terms are explained in plain language in the Glossary.
• Each language edition follows the official sources of its own country or organization. The English edition uses sources such as WHO, CDC, NIH, ACOG and the National Academies. The Japanese and Korean editions use Japanese and Korean official sources, so the numbers are not simply translated copies of each other.

What this site does not do

• It does not diagnose, recommend treatment, or suggest medicines or diets.
• It does not use a value we could not confirm in an official source. For example we do not offer a weight-based water formula or calorie targets for losing weight.
• It does not send or store the values you enter.

How we check

Every number was first read by us in the original official source, then re-checked against the original by a different reviewer, and finally the finished text was audited line by line against the originals. The method, what we left out and how we handle disagreements between organizations are described on How we check sources.

Found a mistake?

If a number or sentence differs from the official source, please tell us through the Ajamall portal contact page (in Korean). Include the page and the place in the source if you can. When we confirm an error we fix it and record the date in the update log on the method page.

About the operator

• This is a private website, not a government or medical organization.
• The code and the explanatory text were written with the help of AI, and the numbers were checked against the original official sources as described above.
• To keep the site running we show Google AdSense advertisements. Ads do not change calculation results or explanations. See Privacy for details.
• Results are general information and not medical advice, diagnosis or treatment. See the Disclaimer.

Sources · How we check sources · Glossary · Disclaimer · Privacy