Estimate batt packs or rolls from wall, attic, or floor area—subtract openings, add waste, and round up to whole packages.
Area to insulate
Total length of walls to insulate (sum of wall runs).
Doors, windows, hatches, and other areas you will not insulate.
Product & coverage
Presets are typical package coverages—always use the sq ft (or m²) printed on your product label for the chosen R-value.
Use 2+ when stacking layers for higher R-value.
5–10% for simple rooms; 10–15% for odd cavities.
Insulation needed
Cost estimate
Enter a pack price to estimate material cost (excludes labor and vapor barrier).
This tool estimates quantity only. Choose R-value from local energy code and climate zone, and confirm cavity depth so batts are not compressed.
Formula
How to Calculate
Examples
關於此計算器
insulation計算器依頁面欄位快速提供insulation結果—適合居家與建築專案。
即時結果
輸入時結果會更新，便於比較insulation方案。
標準公式
計算按本頁欄位採用公認的insulation方法。
瀏覽器免費使用
任意裝置可用，無需下載或帳號。
- 快速規劃
- 作業核對
- 估算
- 日常決策
常見問題
Quick answers about this calculator—how it works, accuracy, and everyday use.
是的。Online Calculator Spot上的insulation計算器免費，在瀏覽器中執行，無需帳號。
可以。現代瀏覽器下insulation計算器適合手機。
insulation計算器依標準insulation公式提供可靠估算。
填寫insulation計算器表單中的數值。資料越準，insulation結果越有用。
屋主、學生、專業人士以及需要快速了解insulation的人。