Guides & Tips

From tool guides to finance, IT & lifestyle tips — practical guides for everyday life.

📌 Featured Guides

Photo file size being reduced from large to exact KB target with a slider

Tool Guides

Why My 2.4MB ID Photo Had to Become 200KB (And How to Do It Without Ruining Quality)

DSR debt service ratio calculation chart with loan limit indicators

Finance & Tax

Korea DSR 2026: How ₩50M Income Caps Your Mortgage (With Stress Test)

Twelve Excel spreadsheet files being consolidated into a single master sheet

Tool Guides

12 Excel Purchase Orders, 3 Methods to Merge Them — Which Saves the Most Time

Traffic accident settlement compensation calculation guide with injury grade chart

Finance & Tax

Why the Insurance Company's First Offer Was 3M Won Short — Traffic Accident Settlement Guide

A person editing a 1000-character self-introduction on a laptop at night

Tool Guides2026-04-24 · 7 min read

How I Fit a 1,000-Character Essay in Exactly 999 — The Complete Word Counter Guide

Characters vs. words vs. bytes, SNS limits, reading-time math, and the with-spaces vs. no-spaces trap that makes or breaks your essay submission.

Two side-by-side charts showing BMI weight categories and BMR calorie needs

Lifestyle2026-04-23 · 8 min read

BMI Said Overweight, BMR Said Eat 1,400 Calories — Which Do I Trust?

BMI and BMR look similar but answer totally different questions. Here's what each number actually tells you, when they clash, and why you probably need both.

A collection of special characters, symbols, and emojis organized by category for copy and paste

Tool Guides2026-04-23 · 7 min read

How to Copy 149,000 Unicode Symbols: The Complete Special Characters Guide

Windows Win+. is slow, Mac Character Viewer is hidden, and typing alt codes is painful. Here's the faster way to grab any symbol, emoji, or character in 2 seconds.

Property sale documents with capital gains tax calculation on a desk

Finance & Tax2026-04-23 · 9 min read

Selling a Korean Apartment for 900M Won: How the Capital Gains Tax Actually Breaks Down

A client of mine sold his Gangnam apartment for 900 million won in profit and ended up paying 0 won in capital gains tax. Here's exactly how the single-home exemption, long-term holding deductions, and multi-property surcharges work in 2026.

Hands holding a court filing with a calculator, showing a repayment plan in progress

Finance & Tax2026-04-23 · 10 min read

Personal Rehabilitation in Korea: Pay 43M, Discharge 100M — 2026 Full Guide

A client of mine had 130 million won in card debt. After rehabilitation, he repaid 52 million over 3 years and had 78 million discharged. Here's how the math, the costs, and life after discharge actually work in 2026.

Tool GuidesImage & File2026-04-23 · 7 min read

12 Excel Purchase Orders, 3 Methods to Merge Them — Which Saves the Most Time

Copy-paste, Power Query, or an online tool? A comparison of Excel merge methods with real-world timing, duplicate handling, and privacy considerations.

A phone screen showing a D-Day countdown with couple anniversary milestones

Lifestyle2026-04-12 · 8 min read

When's Your 100-Day Anniversary? The Complete D-Day Calculator Guide

A practical guide to D-Day counting for couple anniversaries, exam countdowns, military discharge, and due dates. Includes milestone tables, calculation examples, and tips to never miss a date again.

A clock showing bedtime with sleep cycle waves illustrated beside it

Lifestyle2026-04-12 · 9 min read

Why 6 Hours Feels Awful but 4.5 Hours Feels Fine: Sleep Cycle Math

Learn how 90-minute sleep cycles determine whether you wake up refreshed or groggy, the best bedtimes for any wake-up time, and how to stop accumulating sleep debt.

A person checking the time next to empty soju bottles, wondering when it's safe to drive

Lifestyle2026-04-12 · 9 min read

2 Bottles of Soju: How Long Until You Can Legally Drive?

Use the Widmark formula to calculate your BAC after drinking. Covers alcohol content by drink type, Korean DUI thresholds, and realistic elimination timelines so you know exactly when it's safe to get behind the wheel.

A person stepping on a scale with a BMI chart in the background showing weight categories

Tool GuidesLifestyle2026-04-12 · 8 min read

170cm and 68kg Feels Normal — Until BMI Says Overweight

A complete guide to BMI: the formula, Korean vs WHO standards, why your number might be misleading, and what to actually do about it.

A nutrition label next to a BMR calculator showing daily calorie targets

Tool GuidesLifestyle2026-04-12 · 9 min read

How Many Calories Should You Eat to Lose Weight? Start With Your BMR

Learn how to calculate your BMR using the Mifflin-St Jeor formula, convert it to TDEE, and set a safe calorie deficit for fat loss — with a full worked example for a 25-year-old woman.

A side-by-side comparison of Korean age and international age on a birthday cake

Lifestyle2026-04-12 · 9 min read

Korean Age vs Real Age: Why Koreans Are '1–2 Years Older'

Korea used to have three different ways to count age. The 2023 law unified them, but the old system still pops up everywhere. Here is everything you need to know about Korean age, year age, and international age.