Different countries use different units of weight. While most countries use the metric system to measure mass in grams and kilograms, English-speaking countries like the USA and Great Britain continue to use units such as ounces and pounds.
If you’re interested in cooking, sports, nutrition, or science, you’ll frequently encounter ounces and need to convert them to grams . This article explains step-by-step what an ounce is, how many grams it contains, how to convert it , and when to use ounces.
How much does an ounce cost?
The ounce ( oz) is an Anglo-American unit of mass . In the United States, Great Britain, Canada, and other countries, it is used to measure the weight of food, precious metals, and liquids.
There are indeed different types of ounces, and it is important to understand the differences between them:
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Onza Afwardobwa
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The most common unit of measurement is the ounce.
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It is mainly used for measuring the weight of food and everyday items.
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One standard ounce is equivalent to 28.3495231 grams.
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Ornes says
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This type of ounce is used to measure precious metals such as gold, silver, and platinum.
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One troy ounce is equivalent to 31.1034768 grams.
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This has been common practice in the gold and jewelry market for centuries.
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fluid ounce
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It is a unit of measurement for liquid volume, not weight.
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In the United States, 1 fluid ounce is approximately 29.5735 milliliters.
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Therefore, it should not be confused with ordinary ounces (weight).
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Converting ounces to grams: Quick formulas and calculations
Now that you are familiar with the concept of the ounce, we come to the most important part: converting ounces to grams .
General transformation formula
For standard ounces (which are commonly used when cooking and weighing ingredients):
Weight (grams) =
In Trojan ounces (gold and silver):
Weight (grams) = Weight
Example of converting ounces to grams
| Weight (ounces) | ounce | Equivalent (grams) |
|---|---|---|
| 1 ounce | generally | 28.35 grams |
| 2 ounces | generally | 56.70 grams |
| 5 ounces | generally | 141.75 grams |
| 10 ounces | generally | 283.49 grams |
| 1 ounce | Troy | 31.10 grams |
| 10 ounces | Troy | 311.03 grams |
Easy conversion of ounces to grams.
1. Use a calculator or an app.
The easiest way to do this is with a calculator or a unit conversion app. Simply enter the number of ounces and multiply it by 28.35 to get the number of grams.
For example:
2. Use Google or artificial intelligence.
If you search the internet for the following expressions:
Google immediately shows that 5 ounces are equivalent to 141.75 grams.
3. Use conversion tables or charts.
If you use these units of measurement frequently (for example, when cooking or playing sports), it is best to print out a small table and hang it in your kitchen or office so that you can see the conversion results immediately.
Use of ounces and grams in everyday life
1. Cooking and recipes
Many international recipes, especially American ones, list ingredients in ounces . If you live in Iran or another country that uses the metric system, you need to know how many ounces of flour, butter, or sugar are equivalent to grams.
For example:
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8 ounces of flour is approximately 227 grams.
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4 ounces of butter is approximately 113 grams.
2. Bodybuilding and Nutrition
In sports nutrition, protein or meat intake is usually given in ounces . For example, if it is recommended to eat 170 grams of chicken breast per day, this means that you should consume approximately 170 grams of chicken breast .
3. Gold and jewelry
In the gold market, weight is usually measured in troy ounces .
If the world market price for gold is, for example, US$2,000 per ounce , you simply divide it by 31.103 to convert it to grams.
Example:
2000 ÷ 31,103 ≈ US$64.3 per gram of gold
4. Industry and Science
In the pharmaceutical, chemical, and physical industries, ounces are occasionally used, particularly in older scientific publications or to designate devices manufactured in the USA. In these cases, it is important to understand the precise relationship between ounces and grams.
The difference between US ounces and British ounces
It is worth noting that even in the US and the UK there are slight differences in the definition of the ounce, particularly regarding fractions of ounces . However, both countries use the same value for the avoirdupois ounce, which is equal to 28.3495231 grams .
Comparison of ounces with other units of mass
To better understand this, let’s look at how many other units one ounce is equivalent to:
| loneliness | Equivalent to 1 ounce |
|---|---|
| warm | 28.3495231 grams |
| kilogram | 0.02835 kg |
| fairy | 1/16 pound = 0.0625 pounds |
| mg | 28,349.52 mg |
Reverse conversion: from grams to ounces
Sometimes you need to convert weight units from grams to ounces. In this case, use the following formula:
Weight in ounces = Weight in grams 28.3495231 ounces Weight = Weight in grams / 28.3495231
For example:
Quick conversion table from ounces to grams
| ounce (ounce) | Grams (g) | ounce (ounce) | Grams (g) |
|---|---|---|---|
| 0.5 | 14.17 | 10 | 283.49 |
| 1 | 28.35 | 12 | 340.19 |
| 2 | 56.70 | 16 | 453.59 |
| 3 | 85.05 | 20 | 566.99 |
| 4 | 113.40 | 32 | 907.18 |
| 5 | 141.75 | 40 | 1133.98 |
Online tool for converting ounces to grams
Many online calculators allow you to enter the number of ounces and immediately display the result in grams. Here are some of the most popular tools:
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Google Unit Converter
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ConvertUnits.com
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RapidTables.com
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Unit Converters.net
These tools are especially useful for users of mobile devices.
Things to consider when converting ounces to grams
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Please be sure to specify the type of ounce (standard ounce or fine ounce).
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When cooking and preparing food, the ounce should be considered as a common unit of measurement .
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Precious metals should be measured in troy ounces.
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The number 28.35 is sufficient for approximate calculations.
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If you require high accuracy (for example, for gold or pharmaceuticals), use the correct number 28.349523125.
Frequently Asked Questions
1. How many grams are in an ounce?
One standard ounce equals 28.35 grams, and one troy ounce equals 31.10 grams .
2. How can you quickly convert ounces to grams?
Multiply the number of ounces by 28.35.
For example: 5 x 28.35 = 141.75 grams.
3. Is the ounce also used to express volume?
Yes, but then one would be talking about a fluid ounce (fl oz), which is used to indicate the volume of a liquid , not its weight.
4. What is the difference between an ordinary ounce and a Trojan ounce?
Trojan ounces are used to measure precious metals and are slightly heavier than normal ounces.
5. Is the ounce used as a unit of measurement in Iran?
In Iran, the official system uses metric units (grams, kilograms), but ounces are still used in areas such as jewelry making or the translation of foreign cooking recipes .
In conclusion
Converting ounces to grams is one of the most common units of measurement in our everyday lives , from cooking and jewelry making to bodybuilding. Just remember:
One ounce is approximately 28.35 grams,
and one troy ounce is approximately 31.10 grams.
Once you understand this simple relationship, you can easily convert any recipe or the world gold price into metric units.
If you frequently need to perform these unit conversions, we recommend using an online unit converter or conversion app to ensure accurate and fast calculations every time.