Practical guides

Short, plain-language guides with formulas and worked examples, each linked to the free tool that does the maths for you.

• How to Convert Ping (坪) to Square Metres and Square Feet — One ping equals 400/121 m² (about 3.3058 m²). Formulas, a worked example for a 30-ping flat, and a free converter.
• Renovation Cost per Ping in Taiwan: Budget Ranges by Home Age — Typical Taiwan renovation budgets per ping by building age, how the budget splits across trades, and why to keep a 10-15% contingency.
• How Much Paint Do You Need? Room Formula With Example — Calculate paint for any room: wall area, minus doors and windows, times coats, divided by coverage. Worked 4 × 5 m example.
• How a Monthly Loan Payment Is Calculated (With Example) — The amortisation formula behind every fixed-rate loan, with a worked NT$1,000,000 five-year example and how rate changes affect the payment.
• Taiwan Take-Home Pay Explained: What Is Deducted From Your Salary — How gross salary becomes net pay in Taiwan: labor insurance, National Health Insurance, voluntary pension and income tax, and how to estimate it.
• Passport, National ID and ARC Photo Requirements in Taiwan — How to prepare a compliant photo for a Taiwan passport, National ID or ARC/APRC: background, framing, resolution and common rejections.
• How to Reduce Image File Size Without Visible Quality Loss — Shrink JPG, PNG and WebP files for forms, email and websites: resize first, lower quality in small steps, pick the right format.