Ounce to Troy Ounce Converter

Mass Converter

26 units available

Decimals:

From

To

0.911458

1 oz = 0.911458 oz t

Formula:

oz t = oz × 0.9114583333

With your value: 1 oz = 0.91145833 oz t

How big is that?

Everyday references on a logarithmic scale, all expressed in ounce so you can sanity-check the result.

Paperclip (1/28 your value)0.0353 oz

AA battery (1/1.2 your value)0.847 oz

Your value1.00 oz

Can of soda (14× your value)13.8 oz

Bag of sugar (35× your value)35.3 oz

House cat (1.6e+2× your value)159 oz

Other Ounce to Troy Ounce conversions

2 oz to oz t 3 oz to oz t 4 oz to oz t 5 oz to oz t 6 oz to oz t 7 oz to oz t 8 oz to oz t

Ounce to Troy Ounce Conversion Table

Ounce (oz)	Troy Ounce (oz t)
0.5	0.455729
1	0.911458
2	1.822917
5	4.557292
10	9.114583
15	13.671875
20	18.229167
25	22.786458
50	45.572917
100	91.145833
250	227.864583
500	455.729167
1000	911.458333

Troy Ounce to Ounce Conversion Table

Troy Ounce (oz t)	Ounce (oz)
0.5	0.548571
1	1.097143
2	2.194286
5	5.485714
10	10.971429
15	16.457143
20	21.942857
25	27.428571
50	54.857143
100	109.714286
250	274.285714
500	548.571429
1000	1,097.142857

Where these values come from

Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.

Ounce (oz)

Mass

Exact conversion

1 avoirdupois ounce = 1/16 lb = 0.028 349 523 125 kg exactly.

Source: International Yard and Pound Agreement of 1959; NIST Federal Register Notice 59-5442

US, UK, Canada, Australia, New Zealand, South Africa · Reviewed 2026-07-01

Troy Ounce (oz t)

Mass

Exact conversion

1 troy ounce = 480 grains = 0.031 103 476 8 kg exactly. Used for precious metals only.

Source: NIST Handbook 44, Specifications, Tolerances, and Other Technical Requirements for Weighing and Measuring Devices

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

How to Convert Ounce to Troy Ounce

To convert from Ounce (oz) to Troy Ounce (oz t), multiply the value by 0.9114583333.

Formula: oz t = oz × 0.9114583333

Reverse: oz = oz t × 1.0971428571

Step-by-Step Example

Start with your value in Ounce. For example: 5 oz
Multiply by the conversion factor: 5 x 0.9114583333
The result is: 4.557292 oz t

About Ounce

The ounce (oz) equals 1/16 of a pound or approximately 28.35 grams. It is used for food portions and small weight measurements.

Common uses: food portions, postal mail, precious metals.

About Troy Ounce

The troy ounce equals approximately 31.1 grams and is used for weighing precious metals like gold, silver, and platinum.

Common uses: gold trading, silver markets, precious metals.

Frequently Asked Questions

How many Troy Ounce are in 1 Ounce?

There are exactly 0.9114583333 Troy Ounce in 1 Ounce. This means the conversion factor from Ounce to Troy Ounce is 0.9114583333.

What is the formula to convert Ounce to Troy Ounce?

The formula to convert Ounce to Troy Ounce is: oz t = oz × 0.9114583333. For example, to convert 10 Ounce to Troy Ounce, you would multiply 10 by 0.9114583333.

What is a Ounce?