About Let’s Calc

Absurd questions, taken seriously.

Let’s Calc takes the goofy hypotheticals you might raise over drinks and runs them through actual math. How many joules of compression does the rush-hour subway exert on a single passenger’s ribcage? If a paycheck literally fell out of the sky, how would the IRS classify it under §61(a)? We start from the small absurd question and refuse to stop until we’ve shown the working.

We owe an obvious debt to Randall Munroe’s What If? series, but with two twists: we don’t stay in cosmic physics — taxes, prices, sleep, calories, and traffic are equally welcome — and we localize between markets, swapping in metrics like cost-per-square-meter, the Big Mac Index, or USD/KRW where doing so makes the calculation more useful for the reader in front of us.

The Signature Format

Every post follows the same three-part structure:

[INPUT] — The assumptions, stated plainly. Body mass 70 kg, assumption A, assumption B.
[FORMULA] — The working, step by step. Not just the answer — the path to the answer.
[OUTPUT] — The result, plus a little wit about what it means.

Translation: we don’t hide the assumptions, we don’t skip the working, and we don’t dress up the headline at the expense of the proof.

Editorial Policy

We verify formulas and numbers, not just sources. Every cited equation, unit, and computation is reworked from scratch. A bad arithmetic step is a reason to retract.
We disclose assumptions. A surprising answer that depends on a quietly aggressive assumption is no answer at all. Every input value carries a source, and we flag when a number is near the edge of what’s plausible.
Serious in the working, witty only in the conclusion. Jokes do not live inside derivations; they live at the punchline.
Calculations that touch law, tax, or medicine are not advice. YMYL (“Your Money or Your Life”) topics carry a disclaimer at the top of the article. Consult a qualified professional before acting on any of it.
Corrections are public. When a reader flags an error, we revise the post and add a “last reviewed” note. We do not silently rewrite history.

How We Use AI

We use AI tools for research, drafting, and translation assistance. Every post is reviewed by a human editor — assumptions, formulas, and citations — before publication. AI does not replace editorial judgment; it shifts our human hours toward verification rather than first drafts.

Editorial Team

Let’s Calc is operated by a small editorial team. We are not affiliated with any commercial entity, university, or government body. The blog is funded entirely through display advertising. Advertisers do not influence the topics we cover or the conclusions we publish.

Languages

Let’s Calc publishes in English and Korean. The English edition is not a literal translation — units, examples, and references are adapted for English-speaking readers (square feet, Big Mac Index, USD) where doing so makes the calculation more useful.

Contact

For questions, feedback, error reports, calculation suggestions, or collaboration inquiries:

Email: [email protected]

We aim to respond within five business days. See the Contact page for more details on what we can help with.