Tare weight
Tare weight, sometimes called unladen weight or empty weight, is the weight of an empty vehicle or container.
By subtracting tare weight from gross weight, one can determine the weight of the goods carried or contained.
Etymology
The word tare originates from the Middle French word tare 'wastage in goods, deficiency, imperfection', from Italian tara, from Arabic طرح, lit. 'thing deducted or rejected', from 'to reject'.Usage
Tare weight can be useful in computing the cost of the goods carried for purposes of taxation or for tolls related to barge, rail, road, or other traffic, especially where the toll will vary with the value of the goods carried. Tare weight is often displayed upon the sides of railway cars and transport vehicles to facilitate the computation of the load carried. It is also used in body composition assessment when doing underwater weighing.Tare weight is accounted for in kitchen scales, analytical and other weighing scales which include a button that resets the display of the scales to zero when an empty container is placed on the weighing platform, in order subsequently to display only the weight of the contents added into the container.
In the United States, bridge weight limits for trucks and other heavy vehicles may be expressed in terms of gross vehicle weight or empty weight.