Compute unit land price and floor area price from area, transaction price, FAR and building density versus the base land price.
输入土地面积、成交价、容积率与建筑密度，计算单位地价、楼面地价，并与基准地价对比评估溢价。
| Item | Formula / Note | Source / Standard |
|---|---|---|
| Floor price | Floor price = land cost ÷ GFA on plot ratio = unit land price ÷ FAR | Land-transfer pricing convention |
| Benchmark-price adjustment | Price = benchmark × (1 + Σfactor corrections) × date × term correction | GB/T 18508-2014 Urban Land Valuation Procedures |
| FAR effect | Higher FAR dilutes floor price until marginal returns decline | Land-economics analysis |
| Term correction | Residential land max 70 y; K = [1 − 1/(1+r)^n] ÷ [1 − 1/(1+r)^m] | GB/T 18508-2014 term-correction formula |
面向土地评估与开发的基准地价、楼面地价测算工具。依据占地面积、成交价、容积率与建筑密度，输出单位地价、楼面地价、总建筑面积与建筑基底面积，并可与基准地价对比评估溢价水平。