The dram is a traditional unit of weight or volume, depending on context:
In weight (avoirdupois system): 1 dram ≈ 1.772 grams
In volume (apothecaries’ system): 1 fluid dram ≈ 3.696 milliliters (mL)
Used historically in medicine and pharmacy for measuring small quantities of substances.
Summary:
Weight dram ≈ 1.772 g
Fluid dram ≈ 3.696 mL
Common in pharmaceutical and historical contexts
A hogshead is a traditional unit of volume used mainly for liquids like wine, beer, and tobacco.
Its size varies by region and product but typically ranges between 63 to 140 US gallons (238 to 530 liters).
Commonly, a wine hogshead is about 63 US gallons (238 liters).
Used historically for shipping and storage.
Volume varies: about 63–140 gallons depending on use
Used for storing and transporting liquids, especially alcoholic beverages
Traditional barrel unit with regional variations
No conversions available for volume.