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
The tun is a historical unit of volume used primarily for measuring large quantities of liquid, especially wine or other alcoholic beverages.
Traditionally, 1 tun ≈ 252 US gallons (about 954 liters)
It was used in shipping and storage of liquids in large barrels called "tuns."
1 tun ≈ 252 US gallons ≈ 954 liters
Mainly used historically for wine and spirits
Represents a large cask or barrel volume in trade and storage
No conversions available for volume.