# Troy Ounces to Ounces (oz t to oz)

Source: https://www.unitconvertercalculator.com/weight/troy-ounces-to-ounces/

**1 oz t = 1.0971428571429 oz**

One troy ounce equals approximately 1.097 avoirdupois ounces. The troy ounce at 31.1035 grams is about 9.7 percent heavier than the avoirdupois ounce at 28.3495 grams. This small but significant difference means that a 'one-ounce' gold coin actually weighs more than a 'one-ounce' food package, a fact that surprises many first-time precious metals buyers.

## Formula

Apply the conversion factor

## Conversion Table

| Troy Ounces (oz t) | Ounces (oz) |
|---|---|
| 0.1 oz t | 0.10971428571429 oz |
| 0.25 oz t | 0.27428571428571 oz |
| 0.5 oz t | 0.54857142857143 oz |
| 1 oz t | 1.0971428571429 oz |
| 2 oz t | 2.1942857142857 oz |
| 5 oz t | 5.4857142857143 oz |
| 10 oz t | 10.971428571429 oz |
| 25 oz t | 27.428571428571 oz |
| 50 oz t | 54.857142857143 oz |
| 100 oz t | 109.71428571429 oz |
| 250 oz t | 274.28571428571 oz |
| 500 oz t | 548.57142857143 oz |
| 1000 oz t | 1097.1428571429 oz |

## Units

### Troy Ounce (oz t)

A troy ounce is a unit of mass used for precious metals such as gold, silver, and platinum. It equals exactly 31.1034768 grams, about 10% heavier than the common avoirdupois ounce.

### Ounce (oz)

An imperial and US customary unit of mass equal to approximately 28.35 grams. Commonly used in the US and UK for food and postal weight.

## Background

Every precious metals buyer must understand this distinction. A one-troy-ounce gold coin weighs more than one avoirdupois ounce, meaning it tips a postal scale past the one-ounce mark. Confusing the two ounces would mean underpaying for gold by about 10 percent.

## Good to Know

The troy-ounce-to-avoirdupois-ounce conversion is the most practically important 'ounce' distinction in English measurement. The 9.7 percent difference between them is large enough to cause expensive errors but small enough to tempt confusion. Every precious metals retailer, every pawn shop, and every gold exchange relies on their customers understanding this difference, and those who do not learn it pay about 10 percent too much.

## FAQ

### How many avoirdupois ounces are in one troy ounce?

One troy ounce equals approximately 1.097 avoirdupois ounces. The troy ounce is about 9.7 percent heavier.

### Why are there two different ounces?

The troy ounce descends from medieval precious metals trading and the avoirdupois ounce from medieval general commerce. Both evolved independently and were never unified.

### How do I convert troy ounces to avoirdupois ounces?

Multiply troy ounces by 1.097. For example, 10 troy ounces equals about 10.97 avoirdupois ounces.

## Non-Frequently Asked Questions

### If I mail a troy-ounce gold coin, does it cost more postage than a regular ounce?

Yes, slightly. A one-troy-ounce coin weighs about 1.097 avoirdupois ounces, which exceeds the one-ounce postage threshold by 0.097 ounces (about 2.75 grams). You would need to use two-ounce postage rates for a single troy-ounce coin, paying a few cents extra for the privilege of mailing $2,200 worth of gold.

### Has the troy-avoirdupois ounce confusion ever caused a financial error?

Countless times. Inexperienced buyers who weigh gold on a kitchen scale (which reads avoirdupois ounces) and compare to troy-ounce prices will overestimate how much gold they need by about 10 percent. The reverse error, weighing gold on a troy scale and selling at an avoirdupois price, loses about 10 percent of value.

### Which ounce is the 'real' ounce?

Both are real, legal, and widely used, but for different purposes. The avoirdupois ounce dominates everyday commerce in the US and UK. The troy ounce dominates precious metals worldwide. Asking which is 'real' is like asking whether the British or American gallon is 'real': both exist, both are defined, and using the wrong one in the wrong context causes expensive confusion.

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## See Also

- [Ounces to Troy Ounces](https://www.unitconvertercalculator.com/weight/ounces-to-troy-ounces/)