Timber Volume

📐 工作原理与说明

原木材积 V = π/4 × [(d₁² + d₂²) ÷ 2] × 材长（两端直径取 m）；总材积 = V × 根数

Timber Volume: computes and outputs results from the input parameters.

原木材积公式: V = π/4 × (D1² + D2²) / 2 × L，D1 为大端直径，D2 为小端直径

大端直径 D1 (cm)

小端直径 D2 (cm)

长度 L (m)

数量 (根)

板方材积公式: V = 长 × 宽 × 厚

长度 (m)

宽度 (m)

厚度 (m)

数量 (块)

请输入参数后点击计算

Item	Formula / Note	Source / Standard
Log volume	V = 0.7854 × L × (D + 0.45L + 0.2)² ÷ 10000 (scaling length L in m, diameter D in cm)	GB/T 4814-2013 Log Volume Tables
Chinese fir formula	For 4–6 cm logs: V = 0.7854L(D + 0.3904L + 0.3)² ÷ 10000	GB/T 4814-2013
Sawn timber volume	V = L × W × T (m³); sum each piece at net design dimensions	GB/T 4822-2015 Sawn Timber Inspection
Cubic meter conversion	1 m³ = 1000 L; a 2.4 m board of 30 × 120 mm is ≈0.00864 m³	Geometric conversion
Moisture content	Finishing timber should be ≤ local equilibrium MC + 1% (typically 8%–15%)	GB/T 6491-2012 Drying Quality of Sawn Timber

📚 深度解析：木材材积计算

方料材积

板材 2.0m×0.12m×0.04m 材积 = 2.0×0.12×0.04 = 0.0096 m³ 10 根 = 0.096 m³

⚠️ 使用说明与注意事项