← ToolBox / 房屋面积计算

Calculator Calc Area

📐 工作原理与说明

单间面积 = 长 × 宽；建筑面积 = 套内面积合计 ÷ (1 − 公摊率%)；面积占比 = 单间面积 ÷ 合计 × 100%

Calculator Calc Area: computes and outputs results from the input parameters.

公摊率 (%)

💡 单间面积 = 长 × 宽；套内面积 = 各间之和；建筑面积 = 套内面积 ÷ (1 − 公摊率)。

⚠️ 注意事项

暂无计算记录

Item	Formula / Note	Source / Standard
Usable floor area	Sum of net room areas measured between finished wall faces	GB/T 17986.1-2000 Specifications for Real Estate Surveying
In-unit built area	Usable area + in-unit walls (shared walls at half) + balcony area	GB/T 17986.1-2000
Shared area	Apportionment factor = shared area ÷ sum of in-unit built areas	GB/T 17986.1-2000 Chapter 8
Sale area	Sale area = in-unit built × (1 + factor); contract error within ±3% settled at actual	Measures for Administration of Commodity Housing Sales (2001)

📚 深度解析：房屋面积计算

套内汇总

卧室 4×3=12，客厅 5×4=20，厨 2.5×2=5，卫 2×1.5=3 使用面积合计 = 12+20+5+3 = 40㎡

📖关于「房屋面积计算」▼

逐间录入长宽，自动汇总套内面积并计算各房间占比，支持公摊率换算建筑面积，适用于看房验房与装修量房。