How many carats are in one dram?

One avoirdupois dram equals approximately 8.859 carats. This comes from 1 dram being about 1.7718 grams and 1 carat being 0.2 grams: 1.7718 / 0.2 = 8.859.

What is the dram's origin?

The dram descends from the ancient Greek drachma, a coin and weight unit. Through Latin and Old French, it entered English as a measure for small trade goods. The avoirdupois dram (1/16 ounce) differs from the heavier apothecary dram (1/8 apothecary ounce).

Would a gemologist ever use drams?

No. The gemstone industry uses carats exclusively. The dram has no role in modern gemology. This conversion is useful only for historical research or when interpreting old estate documents that may have recorded gemstone weights in drams.

Drams to Carats (dr to ct) Converter

1 dr = 8.8592 ct

1 Dram equals 8.8592 Carats (1 dr = 8.8592 ct). Convert Drams to Carats with formula, table, and examples.

One dram equals approximately 8.859 carats. The avoirdupois dram (about 1.772 grams) is roughly 8.9 times heavier than a carat (0.2 grams). This conversion connects an archaic English trading unit with roots in ancient Greece to the gemstone industry's standard weight. A single dram of diamond would be a substantial collection of nearly 9 carats.

How to Convert Drams to Carats

ct = dr × 8.8592259766

Multiply the value in Drams by 8.8592259766

Take your value in Drams
Multiply by 8.8592259766
Read the result in Carats

Common Drams to Carats Conversions

Drams (dr)	Carats (ct)	Status
0.25 dr	2.2148 ct
0.5 dr	4.4296 ct
1 dr	8.8592 ct
2 dr	17.7185 ct
5 dr	44.2961 ct
10 dr	88.5923 ct
16 dr	141.7476 ct
25 dr	221.4806 ct
50 dr	442.9613 ct
100 dr	885.9226 ct
256 dr	2,267.9619 ct
500 dr	4,429.613 ct
1,000 dr	8,859.226 ct

Good to Know About Drams to Carats Conversion

The dram's journey from ancient Greek drachma to English spice weight spans over 2,000 years of measurement evolution. The drachma was simultaneously a coin and a weight (about 4.3 grams in Athens), reflecting a time when money literally was weight. The English dram, at 1.772 grams, is lighter than its Greek ancestor, having been resized through centuries of trade standardization.

Drams to Carats: What You Need to Know

In the gemstone trade, 8.859 carats represents a significant stone or a group of fine melee diamonds. A single round brilliant diamond of 8.9 carats would be an exceptional piece worth hundreds of thousands of dollars. The dram, once used to weigh spices at English market stalls, now measures a quantity of diamond that would command a king's ransom.

What is a Dram? dr

A dram (avoirdupois) is a unit of mass equal to 1/16 of an ounce or 1/256 of a pound (1.7718451953125 grams). Historically used in pharmacy and old cooking recipes.

Imperial historical pharmacy old recipes whisky measurement

Learn more about Dram →

What is a Carat? ct

A carat is a unit of mass equal to exactly 200 milligrams (0.2 grams), used for measuring gemstones and pearls. Adopted internationally in 1907 by the Fourth General Conference on Weights and Measures.

Metric diamond weight gemstone grading pearl measurement

Learn more about Carat →

Going the other way? Use our Carats to Drams converter.

Drams to Carats FAQ

One avoirdupois dram equals approximately 8.859 carats. This comes from 1 dram being about 1.7718 grams and 1 carat being 0.2 grams: 1.7718 / 0.2 = 8.859.
The dram descends from the ancient Greek drachma, a coin and weight unit. Through Latin and Old French, it entered English as a measure for small trade goods. The avoirdupois dram (1/16 ounce) differs from the heavier apothecary dram (1/8 apothecary ounce).
No. The gemstone industry uses carats exclusively. The dram has no role in modern gemology. This conversion is useful only for historical research or when interpreting old estate documents that may have recorded gemstone weights in drams.

Non-Frequently Asked Questions About Drams to Carats

Questions nobody should ask - but someone did.

In the 1700s, a dram of fine diamonds (nearly 9 carats) would have been extraordinarily valuable - enough to purchase a large estate or fund a merchant voyage. The dram was a common trade weight then, but applying it to diamonds would have been unusual since gemstone dealers already preferred the carat.
A generous dram of fine Scotch (about 35 ml, worth perhaps 5 to 50 dollars) is a wonderful thing. But a weight-dram of diamonds (8.9 carats, potentially worth 50,000 to 500,000 dollars) wins the value contest decisively. The whisky offers better immediate satisfaction; the diamonds offer better long-term investment.
Ordering '9 carats of cinnamon' instead of 'a dram of cinnamon' would mean exactly the same amount of spice. Cuisine would taste identical. But the shift from 'dram' to 'carat' would have confused every recipe in every cookbook in England, causing a brief culinary crisis followed by an immediate return to measuring by the pinch, as most cooks actually do.