---
title: "毛料尺寸计算器"
description: "成品（刨光）尺寸与毛锯尺寸互相换算——干燥窑之前。"
image: "https://nestingcalc.com/og-default.png"
url: "https://nestingcalc.com/cn/rough-sizing-calculator/"
locale: "zh-Hans"
---

# 毛料尺寸计算器

成品（刨光）尺寸与毛锯尺寸互相换算——干燥窑之前。

正向模式：输入成品（刨光、窑干）尺寸、每面刨光余量、锯缝、树种（或自定义 S\_od + FSP）、成品含水率和下锯时含水率，工具给出应切的毛锯尺寸。反向模式相反——一块毛料最后能得到多大的成品？计算先在生材尺寸上叠加刨光余量和锯缝，再按《木材手册》2021 版式 4-9 计算下锯含水率到成品含水率之间的干缩。

Interactive calculator (open in browser): [https://nestingcalc.com/cn/rough-sizing-calculator/](https://nestingcalc.com/cn/rough-sizing-calculator/)

## FAQ

为什么刨光余量和锯缝要分开加？

这是两种不同的损失：锯缝在切割中变成锯末（当场消失），刨光余量是干燥后由刨床削掉的（也消失，只是更晚）。毛料必须足够大，才能在干燥和刨光之后成品仍在公差内。计算器把两者相加，再套用取决于树种和下锯时含水率的干缩。

实际生产中木材在什么含水率下锯切？

气干料在 18–25% MC 下锯切，到 12% MC 时尺寸几乎不变。60–100% MC 的新伐热带硬木，计算会钳制到 FSP 约 30%——木材跨过 FSP 之前不收缩。美国软木默认（约 30% MC 下锯、干到 8%）则干缩真实且显著。

我的锯该用多大锯缝？

带锯 1.8–2.5 mm（木材用 2.2 作为合理默认）；圆锯标准锯片 3.2 mm，薄锯缝锯片 2.4–2.8 mm；工业多锯片纵剖 5.5 mm；主力剖料（大径木第一刀）4–7 mm。锯缝填错是尺寸不合的最常见原因——有条件就用卡尺实测你的锯缝。

## 相关计算器

-   [木材干缩计算器](https://nestingcalc.com/cn/wood-shrinkage-calculator/)

    按树种计算弦向、径向与体积干缩——《木材手册》2021 版式 4-9。

-   [干燥窑容量计算器](https://nestingcalc.com/cn/kiln-capacity-calculator/)

    按材堆尺寸、板厚和隔条厚度算每窑材积（AH-188）。

-   [制材出材率计算器](https://nestingcalc.com/cn/sawmill-recovery-calculator/)

    出材率与原木规则超产率——对照 FAO 与欧盟数据。

-   [板尺计算器](https://nestingcalc.com/cn/board-feet-calculator/)

    计算任意板材的板尺、总体积和木材成本——免费。

## 相关指南

-   [毛料尺寸：干燥和刨削之前该锯多大](https://nestingcalc.com/cn/guides/rough-sizing-before-drying/)

    把刨削余量、锯缝和《木材手册》干缩结合起来，为成品尺寸确定毛料尺寸。

-   [木材干缩：弦向、径向，以及板材为什么会瓦弯](https://nestingcalc.com/cn/guides/wood-shrinkage-explained/)

    《木材手册》2021 版式 4-9 实际如何表现，弦切板为什么瓦弯，以及如何为成品尺寸备料。

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