How many long tons are in 1 ounce?

1 ounce equals 0.0000279018 long tons, using the exact defined conversion factor rather than an estimate.

How do I convert ounce to long ton?

Multiply the ounce value by 0.00002790178571. The converter above does this instantly to whatever precision you set.

How do I convert long ton back to ounce?

Use the reverse factor: 1 long ton equals 35,840 ounces. You can also use the swap control in the converter above to flip the direction instantly.

Long ton (long ton) is a unit of mass/weight.

Is the ounce to long ton conversion exact?

Yes. The avoirdupois ounce is 1/16 of a pound: exactly 28.349523125 grams. That fixed definition is what the converter above uses, so any rounding you see is a display choice, not a limitation of the math.

Ounces to Long tons Converter

Q: What is a ounce?

Ounce (oz) measures mass. The avoirdupois ounce is 1/16 of a pound: exactly 28.349523125 grams. It is classified as a US/imperial customary unit.

About Converting Ounces to Long tons

Weight conversions between Ounce and Long ton come up constantly in everyday commerce, shipping, and cooking, since US packaging is usually labeled in pounds while most of the rest of the world uses kilograms. Ounce is most often used for us cooking and recipe measurement (small quantities).

Formula

long tons = ounces × 0.0000279017857143

This factor comes from each unit's defined relationship to the category's base unit: 1 ounce equals 0.028349523125 base units, and 1 long ton equals 1016.0469088 base units, so dividing one by the other gives the direct ounce-to-long ton factor of 0.0000279017857143.

Simple example

1 oz × 0.00002790178571 = 0.0000279018 long ton

1 ounce = 0.0000279018 long tons.

Real-world example

50 oz × 0.00002790178571 = 0.0013950893 long ton

50 ounces = 0.0013950893 long tons.

Conversion table

Ounce (oz)	Long ton (long ton)
1 oz	0.0000279018 long ton
5 oz	0.0001395089 long ton
10 oz	0.0002790179 long ton
25 oz	0.0006975446 long ton
50 oz	0.0013950893 long ton
100 oz	0.0027901786 long ton

Reverse conversion: Long ton to Ounce

0.0000279018 long ton × 35840 = 1.000000512 oz

0.0000279018 long tons = 1.000000512 ounces.

ounces = long tons × 35840

For a page dedicated to this direction, see Long ton to Ounce.

Understanding the Ounce

Ounce (oz) measures mass. The avoirdupois ounce is 1/16 of a pound: exactly 28.349523125 grams. It is classified as a US/imperial customary unit.

Where it's used: United States (cooking, postal, retail) United Kingdom (informal/retail use)

Avoirdupois ounce vs. troy ounce. The everyday ounce (avoirdupois, 28.35 g) used for cooking and shipping is a different, smaller unit than the troy ounce (31.10 g) used for precious metals like gold and silver — this page uses the everyday avoirdupois ounce.

Uses of the Ounce today

US cooking and recipe measurement (small quantities)
US postal and shipping weight
Precious metals (troy ounce, a related but distinct unit)

History of the Ounce

The ounce descends from the Roman 'uncia' (a twelfth part), inherited through medieval English weight systems; the avoirdupois ounce (for general goods, as opposed to the troy ounce for precious metals) became standard for everyday trade, fixed at exactly 28.349523125 g via the pound's 1959 international standardization.

Historical origin. Ounce was not the invention of a single named person; it developed through the process described above.

Understanding the Long ton (long ton)

A British long ton is 2,240 pounds.

Ounce — sources

NIST — International yard and pound (1959) — Basis for the modern ounce via the standardized pound.

Ounces to Long tons Converter — oz to long ton

Mass/Weight Converter