格令（grain），符号gr，量度质量单位，旧译英厘或喱。例如：

据1856年伦敦造币厂对中国流通的银币的一次化验，证明墨西哥银元含纯银371.57英厘（grain），值英币50.21便士，而西班牙加罗拉银元含纯银370.9英厘，值英币50.12便士。

十九世纪末,关平一两折合581.55英厘(grain),即37.68克。

最初是指一粒大麦（grain，谷物）的质量。

从1958年开始，1格令的质量正式确定为1/7000常衡磅。即1格令=1/7000磅（常衡）=1/5760磅（金衡）=0.06479891克=64.79891毫克

A grain is a unit of measurement of mass equal to 7001647989100000000♠64.79891 milligrams. It is nominally based upon the mass of a single seed of a cereal. From the Bronze Age into the Renaissance the average masses of wheat and barley grains were part of the legal definition of units of mass. However, there is no evidence of any country ever having used actual seeds or cereal grains. Rather, expressions such as "thirty-two grains of wheat, taken from the middle of the ear" appear to have been ritualistic formulas, essentially the premodern equivalent of legal boilerplate.