秤量房（荷兰语：waag；德语：waage；英语：weigh house 或 weighing house）是一种公共建筑，商品或其他东西在其内计重。大多数此类建筑建于1800年之前，即国际重量标准创建之前。由于对商品重量的公共控制十分重要，所以地方当局亲自掌控此事务，并利用秤量房对在该地方销售或经该地方运输的商品征税。因此，秤量房经常设在市场边或市中心。

从1550年到约1690年，被控施巫术者有时会被带到秤量房内进行“巫师测试”。如果一个人的体重轻于某个已设定的重量，该人便被认定有罪。

秤量房在荷兰和德国最为常见。比利时等国也有。秤量房在荷兰语中称作waag，在德语中称作waage，二者的意思均为“秤”。在荷兰、德国以外的其他国家，公共计重一般不在专用建筑内进行，而是在市政厅、行会厅、法院等建筑内进行。

A weigh house or weighing house is a public building at or within which goods, and the like, are weighed. Most of these buildings were built before 1800, prior to the establishment of international standards for weights. As public control of the weight of goods was very important, they were run by local authorities who would also use them for the levying of taxes on goods transported through or sold within the city. Therefore, weigh houses would often be near a market square or town centre.