壁纸的估算 　　Special circumstances (cathedral ceilings, stairways, etc.) will need a professional estimate. Exact estimates can be obtained by contacting us, or if a professional will be doing the installation, they will provide this service. 　　特殊情况(如教堂天花板、楼梯等)需要一个专业的估算，要想获得准确的估算可以联系我们，或者如果你需要一个专业的安装，他们都可以提供这些服务。 　　Estimation Method 　　估算方法 　　The first step is an accurate measurement of the walls that are to be covered. Use a yardstick or steel tape measure. Measure in feet rounding up to the next half or whole foot. Below is a diagram showing a generic room to illustrate how this estimation takes place. First, add together the length of every wall that will be covered then, multiply this number by your ceiling height.Divide this figure by 25, the number of square feet in a single roll of wallpaper. Round any fractions up. This gives you the number of single rolls needed. Note that rooms of unusual size or shape, greater than normal wastage during hanging, or other special circumstances may affect the amount needed. Please contact us or your wallpaper installer to calculate your exact paper needs based on your room geometry. This method will provide you with an accurate amount of single rolls needed. Keep in mind, that most of our papers are sold in double rolls, so you will divide your ultimate figure by two, rounding up any fraction. 　　第一步就是精确测量被覆盖了的墙面，使用标尺或者钢卷尺测量。测量脚围的一半或者全部，下面这个通用图是用来举例说明如何估算一个房间的用量。首先，用被覆盖的每个墙的长度相加，再乘以天花板的高度，再除以图中的25，所得的平方英尺就是单卷壁纸数。然后任何小数点后都四舍五入。这就是所需壁纸的单卷数。记下房间的不规则大小和形状，比正常损耗在悬挂之间，或者其他特殊情况下所消耗的数目都要大。欢迎联系我们，或许给你的安装工能够基于你房间的几何形状精确算出所需的壁纸数。这个方法能够为你提供一个准确的单卷壁纸所需要的数量。记住，我们大部分壁纸都是按双卷出售的，所以你必须用你的最后的数除以2，然后再四舍五入。

估算举例

20'+20'+15'+15'=70'（房间周长）

70'*8'（天花板的高度）=560'

560'/25=22.4(单卷)

然后小数点后再四舍五入