Dram (dr) - Unit Information & Conversion
What is a Dram?
Definition
The dram (or drachm) can refer to several units. In the context of common weight conversion (Avoirdupois system), it is a unit of mass equal to 1/16 of an ounce or 1/256 of a pound. This Avoirdupois dram is approximately 1.7718 grams.
History
The term originates from the Greek drachma coin. It became a unit in multiple historical weight systems (Avoirdupois, Apothecaries', Troy). The Avoirdupois dram was used for general commodities.
Common Uses
- Historical Measurement: Found in older texts and recipes.
- Ammunition Reloading: Powder charges are sometimes measured in dram equivalents (though grains are more common).
- Note: The fluid dram (fl dr) is a unit of volume in the Apothecaries' system, distinct from the Avoirdupois dram mass unit.
Unit FAQs
How many drams are in an ounce (avoirdupois)?
There are 16 drams (dr) in 1 avoirdupois ounce (oz).
How many grams are in a dram (avoirdupois)?
There are approximately 1.771845 grams (g) in 1 avoirdupois dram (dr).
Is a dram a unit of mass or volume?
It can be both, which causes confusion. The Avoirdupois dram (dr) is mass (1/16 oz). The fluid dram (fl dr) is volume (1/8 fl oz).
Dram Conversion Formulas
To Kilogram:
To Gram:
To Milligram:
To Pound:
To Ounce:
To Stone:
To Ton (metric):
To Ton (US):
To Ton (UK):
To Microgram:
To Carat:
To Slug:
To Troy Ounce:
To Pennyweight:
To Grain:
To Quintal:
To Atomic Mass Unit:
To Pavan (India):
To Kati (India):
To Masha (India):
To Dina (India):
To Pras (India):
To Lota (India):
Convert Dram
Need to convert Dram to other weight units? Use our conversion tool.