Apothecaries' Drams to Metric Tons (ʒ to t)

1 apothecaries' dram equals 0.0000038879346 metric tons exactly.

1 apothecaries' dram = 0.0000038879346 metric tons

How to convert apothecaries' drams to metric tons

To convert apothecaries' drams to metric tons, multiply the number of apothecaries' drams by 0.0000038879346. This factor is exact. To go the other way, multiply metric tons by 257,205.9725 (rounded).

metric tons = apothecaries' drams × 0.0000038879346

Example: 10 apothecaries' drams = 0.000038879346 metric tons.

About these units

Apothecaries' Dram (ʒ)

Troy & apothecaries'Historical unit (no longer in standard use)

60 grains or 3 scruples (3.888 g). Used in old medical prescriptions.

Greek drachma coins left their mark on this unit, which the apothecaries' tables spelled drachm or dram and abbreviated with a curled symbol. It was worth 60 grains, or three scruples, or about 3.89 grams, and eight of them filled an apothecaries' ounce.

Doctors wrote it into Latin prescriptions with Roman numerals, so three drams appeared as the symbol followed by iij and half a dram as the symbol followed by ss, short for semis. Until about 1900 most prescriptions were written this way.

Do not confuse it with the avoirdupois dram, which is much smaller than this one, and with the fluid dram used for liquids. An Irish pharmacopoeia of 1850 even proposed an avoirdupois-based version of about 54.68 grains. British law ended the apothecaries' system in the 1970s, and modern doses are given in grams or milligrams.

1 apothecaries' dram = 0.0038879346 kilograms (exactly).

Sources: Wikipedia: Apothecaries' system; Wikipedia: Troy weight

Metric Ton (t)

Metric (SI)Current unit

1,000 kilograms (about 2,204.6 lb), also spelled tonne. Used for cargo, grain and vehicle weights outside the US.

Barrels gave the tonne its name. The word goes back to a Germanic root for a large cask, the tun, and a full tun could easily weigh around a tonne. In English this became ton; the spelling tonne has been used in France since 1842, where it replaced the older tonneau, and pre-metric French tonnes were 2,000 livres, about 979 kg. Once the metric system took hold, the tonne was fixed at 1,000 kilograms, which is the mass of roughly a cubic metre of water.

The unit is accepted for use with the SI, and its symbol is a lowercase t with no period. Because it sits close to the old English ton, the two get confused: the short ton used in the US is about 10 percent lighter than a tonne, while the long ton differs by less than 2 percent. NIST calls the unit the metric ton, and the spelling tonne is rare in the US. Very large quantities are stated in prefixed forms such as the megatonne, which equals a teragram. In explosives, a tonne of TNT is taken as about 4.2 gigajoules.

1 metric ton = 1,000 kilograms (exactly).

Sources: Wikipedia: Tonne; Wikipedia: Ton; NIST Guide to the SI, Appendix B.8 (mass conversions)

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