Understanding Troy Ounces to Slugs Conversion
The troy ounce (ozt) is the precious-metals mass unit of about 31.10 grams, while the slug is the imperial gravitational unit of mass, equal to about 14.5939 kilograms (the mass accelerated at 1 ft/s2 by one pound-force). One troy ounce equals 0.002131265 slugs. This conversion is mainly of interest in engineering mechanics rather than trade.
Conversion Formula
To convert Troy Ounces to Slugs, multiply by this factor:
Step-by-Step Example
Convert 25 Troy Ounces to Slugs.
How to Convert Troy Ounces to Slugs
Multiply by 0.002131265 slugs per troy ounce.
- Identify the input: Take the mass in troy ounces (ozt).
- Multiply by the factor: Multiply by 0.002131265 to convert to slugs.
- Read the result: The result is the mass in slugs.
- Worked example: For 25 troy ounces: 25 x 0.002131265 = 0.0532816 slugs.
Troy Ounces to Slugs conversion table
| Troy Ounces (ozt) | Slugs (slug) |
|---|---|
| 0 | 0 |
| 1 | 0.002131265 |
| 2 | 0.00426253 |
| 3 | 0.006393795 |
| 4 | 0.008525061 |
| 5 | 0.01065633 |
| 6 | 0.01278759 |
| 7 | 0.01491886 |
| 8 | 0.01705012 |
| 9 | 0.01918139 |
| 10 | 0.02131265 |
| 15 | 0.03196898 |
| 20 | 0.0426253 |
| 25 | 0.05328163 |
| 30 | 0.06393795 |
| 40 | 0.08525061 |
| 50 | 0.1065633 |
| 60 | 0.1278759 |
| 70 | 0.1491886 |
| 80 | 0.1705012 |
| 90 | 0.1918139 |
| 100 | 0.2131265 |
| 150 | 0.3196898 |
| 200 | 0.426253 |
| 250 | 0.5328163 |
| 300 | 0.6393795 |
| 400 | 0.8525061 |
| 500 | 1.065633 |
| 600 | 1.278759 |
| 700 | 1.491886 |
| 800 | 1.705012 |
| 900 | 1.918139 |
| 1000 | 2.131265 |
| 2000 | 4.26253 |
| 3000 | 6.393795 |
| 4000 | 8.525061 |
| 5000 | 10.65633 |
| 10000 | 21.31265 |
| 25000 | 53.28163 |
| 50000 | 106.5633 |
| 100000 | 213.1265 |
| 250000 | 532.8163 |
| 500000 | 1065.633 |
| 1000000 | 2131.265 |
What is the Troy Ounce?
The troy ounce is a unit of mass used almost exclusively for precious metals such as gold, silver, platinum, and palladium. It is the standard weight quoted on global bullion markets.
Definition
The troy ounce is defined as exactly 480 grains, which equals 31.1034768 grams:
By definition, 1 troy ounce = 480 grains = 31.1034768 g exactly, and 12 troy ounces make one troy pound (≈373.242 g). Note that the troy ounce is heavier than the more familiar avoirdupois ounce (≈28.3495 g).
Origin and History
The troy system takes its name from the French market town of Troyes, a major medieval trading hub. It descends from the Roman monetary system and was standardized in England for coinage and precious metals, later adopted across Europe and the English-speaking world.
Law and Notable Facts
The troy ounce remains the legal basis for bullion trading and coinage weights; in the United States it is codified for precious-metal transactions. A curious consequence is that a pound of gold (troy, ~373 g) actually weighs less than a pound of feathers (avoirdupois, ~454 g).
Real-World Examples and Conversions
A standard Good Delivery gold bar weighs about 400 troy ounces (≈12.4 kg). A 1 oz American Gold Eagle contains one troy ounce (31.1 g) of gold. When gold is quoted at "$2,000 per ounce," that means per troy ounce, not the avoirdupois ounce.
What is the Slug?
The slug is the unit of mass in the British Gravitational (foot–pound–second) system of units, used chiefly in engineering and physics involving imperial units.
Definition
The slug is the mass that accelerates at 1 foot per second squared when a force of one pound-force is applied:
It follows from , giving exactly 14.593902937206 kg. A one-slug mass therefore weighs about 32.174 pounds-force under standard gravity.
Origin and History
The slug was introduced in the early 20th century to give the imperial system a coherent mass unit consistent with Newton's second law, avoiding confusion between the pound as a unit of mass and the pound-force as a unit of force. The name was popularized by British physicist Arthur Mason Worthington.
Law and Notable Facts
The slug is not part of SI but remains in use in some U.S. and British engineering fields, especially aeronautics and ballistics. Its counterpart is the "slinch" (pound·s²/inch), which is exactly 12 times larger.
Real-World Examples and Conversions
An object weighing 32.174 lbf at standard gravity has a mass of exactly 1 slug (≈14.59 kg). A 160-pound person has a mass of roughly 4.97 slugs. One slug is close to the mass of a typical bowling-ball-and-a-half, about 14.6 kg.
Frequently Asked Questions
How many slugs are in a troy ounce?
One troy ounce equals 0.002131265 slugs, a very small figure given the slug is a large unit.
What is a slug?
The slug is the imperial unit of mass in the foot-pound-second system, about 14.59 kilograms or 32.174 pounds.
How do I convert slugs back to troy ounces?
Multiply slugs by 469.2049. So one slug is about 469.2 troy ounces.
When would I use slugs?
In classical mechanics and aerospace problems that keep force in pounds and length in feet, the slug keeps Newton's second law consistent.
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Complete Troy Ounces conversion table
| Unit | Result |
|---|---|
| Micrograms (mcg) | 31103480 mcg |
| Milligrams (mg) | 31103.48 mg |
| Grams (g) | 31.10348 g |
| Kilograms (kg) | 0.03110348 kg |
| Metric Tonnes (mt) | 0.00003110348 mt |
| Carats (ct) | 155.5174 ct |
| Ounces (oz) | 1.097143 oz |
| Pounds (lb) | 0.06857143 lb |
| Stones (st) | 0.004897959 st |
| Tons (t) | 0.00003428571 t |
| Long Tons (long-ton) | 0.00003061224 long-ton |
| Grains (gr) | 480 gr |
| US Hundredweights (cwt-us) | 0.0006857143 cwt-us |
| UK Hundredweights (cwt-uk) | 0.0006122449 cwt-uk |
| Slugs (slug) | 0.002131265 slug |