About the Units
assay ton (AT)
A unit of mass equal to 29.167 grams, used in precious metal assaying.
grain (gr)
A unit of mass equal to 64.79891 milligrams, originally based on the weight of a grain of barley.
Common Conversions
- 1 AT = 450.11053 gr
- 0.0022216765 AT = 1 gr