Inputs
Rule of thumb: coverage depends on paint, surface, and color change. Add a small margin for waste.
Results
Fill inputs, then click Calculate.
Tip: if you know the product label coverage, use that number for best accuracy.
Rule of thumb: coverage depends on paint, surface, and color change. Add a small margin for waste.
Tip: if you know the product label coverage, use that number for best accuracy.
Paint calculator — Estimate how much paint you need from area, coats, and coverage (plus a waste margin). Metric + Imperial. Shareable, browser-only MVP.
Example: Use this tool to sanity-check numbers quickly, then share the link if you need to discuss with others.
FAQ: (1) Does it upload my data? No—runs in your browser. (2) Can I share results? Yes—use the share link feature. (3) Is it authoritative? Treat it as a convenience, not professional advice.
油漆用量計算器 — 用面積、層數與覆蓋率（加上耗損預留）估算油漆用量。支援公制/英制，可分享連結、純前端。
範例：用這個工具快速試算與對照結果，需要討論時再把連結分享給對方。
FAQ： (1) 會上傳資料嗎？不會，計算在瀏覽器內完成。 (2) 能分享結果嗎？可以，用分享連結。 (3) 準確嗎？請把它當作便利工具，不是專業建議。