How many drams are in one long ton?

One long ton (2,240 pounds) contains exactly 573,440 drams. This comes from 2,240 pounds x 16 ounces per pound x 16 drams per ounce = 573,440.

What was the long ton used for?

British shipping, coal trading, and bulk commodity measurement. One long ton equals 20 long hundredweights (20 x 112 = 2,240 pounds). It has been largely replaced by the metric tonne.

Is 573,440 an exact number?

Yes. Because the dram, ounce, pound, hundredweight, and ton are all defined in exact ratios within the avoirdupois system, the drams-per-long-ton figure is exactly 573,440, with no rounding.

Drams to Long Tons (dr to long tn) Converter

1 dr = 0.000002 long tn

1 Dram equals 0.000002 Long Tons (1 dr = 0.000002 long tn). Convert Drams to Long Tons with formula, table, and examples.

One dram equals approximately 1.744 x 10^-6 long tons. The long ton (2,240 pounds, 1,016.05 kg) contains about 573,440 drams. This conversion spans six orders of magnitude between a unit designed for pinches of spice and a unit designed for shiploads of cargo - the full breadth of the British imperial weight system in a single ratio.

How to Convert Drams to Long Tons

long tn = dr ÷ 573,440

Divide the value in Drams by 573,440

Take your value in Drams
Divide by 573,440
Read the result in Long Tons

Common Drams to Long Tons Conversions

Drams (dr)	Long Tons (long tn)	Status
1,000 dr	0.0017438616 long tn
5,000 dr	0.008719308 long tn
10,000 dr	0.0174386161 long tn
50,000 dr	0.0871930804 long tn
100,000 dr	0.1743861607 long tn
500,000 dr	0.8719308036 long tn
1,000,000 dr	1.7438616071 long tn
5,000,000 dr	8.7193080357 long tn

Good to Know About Drams to Long Tons Conversion

The long ton sits at the top of the avoirdupois pyramid: 573,440 drams, 35,840 ounces, 2,240 pounds, 160 stone, 20 hundredweights, 1 ton. This nested structure, while arithmetically complex, gave merchants at every scale a unit that felt natural. The dram felt right for spices. The ton felt right for ship cargo. Each level served its purpose without requiring anyone to think about the others.

Drams to Long Tons: What You Need to Know

A fully loaded Victorian cargo ship might carry 5,000 long tons of goods - roughly 2.87 billion drams. No ship's manifest was ever written in drams, but the arithmetic illustrates the colossal scale difference between retail spice measurement and maritime freight. The British system accommodated both with the same set of base units, linked by factors of 16 and 14.

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 Long Ton? long tn

A long ton (imperial ton) is a unit of mass equal to exactly 2,240 pounds or 1,016.0469088 kilograms. It is used primarily in the United Kingdom for shipping and naval displacement.

Imperial UK shipping naval displacement Commonwealth trade

Learn more about Long Ton →

Going the other way? Use our Long Tons to Drams converter.

Drams to Long Tons FAQ

One long ton (2,240 pounds) contains exactly 573,440 drams. This comes from 2,240 pounds x 16 ounces per pound x 16 drams per ounce = 573,440.
British shipping, coal trading, and bulk commodity measurement. One long ton equals 20 long hundredweights (20 x 112 = 2,240 pounds). It has been largely replaced by the metric tonne.
Yes. Because the dram, ounce, pound, hundredweight, and ton are all defined in exact ratios within the avoirdupois system, the drams-per-long-ton figure is exactly 573,440, with no rounding.

Non-Frequently Asked Questions About Drams to Long Tons

Questions nobody should ask - but someone did.

At one dram per second, counting to 573,440 would take about 6.6 days of nonstop counting. That is nearly a week of doing nothing but saying numbers - to count the drams in a single ton. Victorian clerks who had to verify bulk weights did so by weighing in stones and hundredweights, not by counting individual drams.
It factors as 2,240 x 256, or equivalently 2⁸ x 2,240. The factor of 256 (16 x 16) reflects the dram's nested position: 16 drams per ounce, 16 ounces per pound. The 2,240 reflects the pounds per ton. It is not elegant, but it is structurally logical within the avoirdupois system's design.
Victorian humor was fond of measurement absurdity. The idea of measuring something enormous in something tiny - like weighing a whale in grains or an ocean in teaspoons - appeared in satirical writing. '573,440 drams of coal' would have been understood as comically impractical, making the point that some conversions exist for mathematics, not for merchants.