This is a rough estimate (not medical advice). Real weight change is not perfectly linear.
If you have a history of eating disorders, are pregnant, or have medical conditions, talk to a professional before using aggressive deficits.
Calorie deficit calculator — Estimate your daily calorie deficit and target calories from TDEE and a weekly goal (kg/week or lb/week). 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.
熱量差（赤字）計算器 — 用 TDEE 與每週目標，估算每日熱量差與每日攝取目標（kg/週 或 lb/週）。可分享連結、純前端 MVP。
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。