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Do you want to know how to measure grams and convert them to ounces? Converting units of weight is helpful when cooking or baking, for instance. If you want to learn how to convert grams to ounces or ounces to pounds, we can help you out. Learn how many grams in an ounce.

Our weight conversion guide gives you a primer on the U.S. customary and metric units of weight and how you can quickly convert measurements of grams into ounces or vice versa. Ready to become an expert at converting grams to ounces? Let’s get started! 

TL;DR (Too Long; Didn’t Read): 28.3495 grams are in an ounce.

What Is the Difference Between Mass and Weight?

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If we are going to be covering gram-to-ounce conversions, we must understand the difference between mass and weight. These terms are often mixed up and used interchangeably, although they refer to different things.

What is mass?

Mass refers to the quantity of matter in an object, often measured in kilograms and grams. These are part of the metric system of measurement.

What is weight? 

Weight refers to the gravitational force exerted on an object that has mass. 

Feeling confused? No worries! Essentially, weight is the result of gravity’s effect on mass. Here is a formula to simplify the relationship between mass and weight:

Weight = Acceleration due to gravity x Mass

On Earth, gravity is relatively constant, except for minor variations due to environmental factors. For example, gravity is not as strong near the equator due to centrifugal forces from the planet’s rotation. Gravity is also weaker at higher altitudes since the object is further from the Earth’s center.

If we were to measure the weight of an object on the moon or Mars, it would be different from its weight on Earth due to variations in gravity. For example, a person who weighs 160 lbs on Earth would weigh 26.45 lbs on the moon. That is a considerable difference in weight between planets.

Earth’s average surface gravity is 9.8 meters per second per second, while the moon’s average surface gravity is 1.6 meters per second per second.

Summary: Mass is an unchanging property of matter. Wherever you are, your mass does not change. Weight, however, depends on the acceleration due to the gravity of the location. For example, an environment without gravity does not exert a force on an object, so the object’s weight is zero.

Understanding U.S. Customary and Metric Units of Weight

If you are measuring weight in the U.S., you will most likely be using units of ounces, pounds, and tons. If, however, you are outside of the U.S., you will be using grams, kilograms, and metric tons to measure the weight of an object. The latter units of weight are part of the metric system used all over the world.

Here is a quick conversion of U.S. units of weight:

Now, here is the conversion between metric units of weight:

  • 1,000 grams = 1 kilogram
  • 1,000 kilograms = 1 metric ton
  • 1,000,000 grams = 1 metric ton
  • 1 ounce = 28.3495 grams

Having trouble understanding the conversions between units of weight? Check out this conversion table to understand the relationship between customary units of weight and their metric equivalent:

Customary UnitCustomary EquivalentMetric Equivalent
1 oz28.3495 g
1 lb16 oz453.5923 g
1 ton2,000 lbs907.1837 g

Summary: U.S. customary units of weight are listed as ounces, pounds, and tons. Metric units of weight are listed as grams, kilograms, and metric tons. These units of measurement can be converted into one another.

What Is a Gram?

According to Merriam-Webster, a gram, abbreviated as g or gm, is “a metric unit of mass equal to 1/1000 kilogram and nearly equal to the mass of one cubic centimeter of water at its maximum density.”

Grams are the most popular unit of measurement for non-liquid ingredients in grocery shopping and cooking around the world. Liquid ingredients are measured by volume, not mass.

Summary: A gram is a metric unit of mass defined as 1/1000 of a kilogram.

What Is an Ounce?

According to Merriam-Webster, an ounce is “a unit of weight equal to 1/12 troy pound” or “1/16 avoirdupois pound.”

What is a troy ounce?

A troy ounce, abbreviated as oz t or t oz, is a system of weight used to measure precious metals and gems. A troy ounce is equal to 1/12 of a troy pound (0.0833 troy pounds) and 31.1035 grams. A troy ounce is slightly heavier than the standard avoirdupois ounce.

What is an avoirdupois ounce?

An avoirdupois ounce is a system of weight. In this system, commonly used in the U.S., an ounce is 1/16 of an avoirdupois pound. An avoirdupois ounce is 0.0625 lbs or 28.3495 grams.

Summary: An avoirdupois ounce is 1/16 of an avoirdupois pound or 28.3495 grams. A troy ounce, used to measure the weight of precious metals, is 1/12 of a troy pound or 31.1035 grams.

How Many Grams in an Ounce?

There are 28.3495 grams in an ounce.

When measuring grams of precious metals such as silver, platinum, or gold, however, the troy unit of weight is used instead of the avoirdupois ounce. There are 31.1035 grams in a troy ounce.

How Many Ounces in a Gram?

There are 0.035274 ounces in a gram.

In terms of troy units of weight, there are 0.0321507 troy ounces in a gram.

How to Convert Grams to Ounces

If you want to convert grams to ounces, divide the number of ounces by 28.3495. Since there are 28.3495 grams in an ounce, you can easily convert grams to ounces.

Convert grams to ounces using this formula:

Ounces = Grams divided by 28.3495

Examples:

1 gram ÷ 28.3495 = 0.0352 ounces

2 grams ÷ 28.3495 = 0.0705 ounces

5 grams ÷ 28.3495 = 0.1763 ounces

10 grams ÷ 28.3495 = 0.3527 ounces

28.3495 grams ÷ 28.3495 = 1 ounce

100 grams ÷ 28.3495 = 3.5273 ounces

1,000 grams ÷ 28.3495 = 35.2739 ounces

Summary: To convert grams to ounces, divide the number of grams by 28.3495.

How to Convert Ounces to Grams

If you want to determine the number of ounces in a gram, multiply the number of ounces by 28.3495. Since there are 28.3495 grams in an ounce, you can determine how many ounces are in a gram using this number.

Convert ounces to grams using this formula:

Grams = Ounces multiplied by 28.3495

Examples:

0.035274 ounces x 28.3495 = 1 gram

1 ounce x 28.3495 = 28.3495 grams

2 ounces x 28.3495 = 56.699 grams

5 ounces x 28.3495 = 141.7475 grams

10 ounces x 28.3495 = 283.495 grams

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100 ounces x 28.3495 = 2,834.95 grams

Summary: To convert ounces to grams, multiply the number of ounces by 28.3495.

How Many Grams in a Tenth of an Ounce?

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There are 2.83495 grams in one-tenth of an ounce. To determine the number of grams in a tenth of an ounce, multiply the number of grams in an ounce (28.3495) by one-tenth of an ounce (0.1).

0.1 oz x 28.3495 = 2.83495 grams

You can also divide the number of grams in an ounce (28.3495) by 10.

28.3495 ÷ 10 = 2.83495 grams

How Many Grams in an Eighth of an Ounce?

There are 3.5436904 grams in one-eighth of an ounce. Determine how many grams are in an eighth of an ounce by multiplying one-eight of an ounce (0.125) by 28.3495.

0.125 oz x 28.3495 = 3.5436 grams

Another way to reach the same result is to divide 28.3495 by eight.

28.3495 ÷ 8 = 3.5436 grams

How Many Grams in a Quarter of an Ounce?

There are 7.087381 grams in a quarter of an ounce. If you want to determine how many grams are in a quarter ounce, multiply a quarter ounce (0.25) by 28.3495.

0.25 x 28.3495 = 7.087 grams

Get the same result by dividing 28.3495 by four.

28.3495 ÷ 4 = 7.087 grams

How Many Grams in Half an Ounce?

There are 14.1748 grams in a half-ounce. Multiply a half-ounce (0.5) by 28.3495 to convert half an ounce to grams.

0.5 x 28.3495 = 14.1748 grams

Reach the same result by dividing 28.3495 by two.

28.3495 ÷ 2 = 14.1748 grams

How Many Grams in Three-Quarters of an Ounce?

There are 21.2621 grams in three-quarters of an ounce. Multiply three-quarters of an ounce (0.75) by 28.3495 to convert ¾ of an ounce into grams.

0.75 x 28.3495 = 21.2621 grams

Another way to convert three-quarters of an ounce into grams is by dividing 28.3495 by 1.3333349.

28.3495 ÷ 1.3333349 = 21.2621 grams

How Many Grams in an Ounce and a Half?

There are 42.5243 grams in an ounce and a half. Multiply an ounce and a half (1.5) by 28.3495 to determine the number of grams in 1 ½ ounces.

1.5 x 28.3495 = 42.5243

Divide 28.3495 by 0.66666588 to determine how many grams are in an ounce and a half.

28.3495 ÷ 0.66666588 = 42.5243 grams.

How Many Fluid Ounces Are in a Gram?

Fluid ounces, abbreviated as fl oz, are units used to measure the volume of a liquid. When converting fluid ounces to grams, you need to know the density of the liquid to get an accurate conversion. 

For example, water is less dense than honey. Since the density of each liquid is different, their equivalent in grams will be different, too. Density is the degree of compactness of a substance.

For a better understanding of the density of common liquids at 68º F (20º C) and 1 atm (atmospheric pressure), check out the table of liquid densities below.

FluidDensity (g/cm3)
Water0.99820
Milk1.028-1.035
Olive oil0.9
Sea water1.03
Ethyl alcohol0.791
Gasoline0.66-0.69

A standard dry ounce is not the same as a fluid ounce. Standard ounces measure the weight of dry ingredients, such as flour and sugar. Fluid ounces do not measure the weight of a dry ingredient. They measure the volume of liquid ingredients, such as water or milk.

If you want to convert a fluid ounce measurement into a gram measurement, there is a formula you can use.

Grams = (fluid ounces x density of substance) x 29.57353

For example, here is how to convert 10 fl oz to grams with an ingredient density of 0.8 g/mL.

10 fl oz = (10 x 0.8) x 29.57353 = 236.58824 grams

Summary: To determine the number of fluid ounces in a gram, multiply the volume of the liquid by its density and then multiply that result by 29.57353.

Gram to Ounce Conversion Table

If you are not too keen on doing the math to convert grams to ounces, we have created a handy gram-to-ounce conversion table.

Grams (g)Ounces (oz)
1 g0.0353 oz
2 g0.0706 oz
3 g0.1058 oz
4 g0.1411 oz
5 g0.1764 oz
6 g0.2116 oz
7 g0.2469 oz
8 g0.2822 oz
9 g0.3175 oz
10 g0.3527 oz
20 g0.7055 oz
30 g1.0582 oz
40 g1.4110 oz
50 g1.7637 oz
60 g2.1164 oz
70 g2.4692 oz
80 g2.8219 oz
90 g3.1747 oz
100 g3.5274 oz

Ounce to Gram Conversion Table

Skip using the math formulas to get your ounce-to-gram conversion. Instead, refer to our ounce-to-gram conversion table below to simplify the conversion.

Ounces (oz)Grams (g)
1 oz28.35 g
2 oz56.70 g
3 oz85.05 g
4 oz113.40 g
5 oz141.75 g
6 oz170.10 g
7 oz198.45 g
8 oz226.80 g
9 oz255.15 g
10 oz283. 50 g
20 oz566.99 g
30 oz850.49 g
40 oz1133.98 g
50 oz1417.48 g
60 oz1700.97 g
70 oz1984.47 g
80 oz2267.96 g
90 oz2551.46 g
100 oz2834.95 g

List of Items That Weigh About One Gram

Have you ever wondered what items weigh one gram? If you are curious, here are a handful of things that weigh about one gram.

  • U.S. dollar bill
  • Paper clip
  • Bic brand pen can
  • One Japanese yen coin
  • One piece of chewing gum

How to Measure Dry Weight

For the general public, a simple scale (mechanical or digital) is the best way to measure the correct weight of everyday objects, such as cooking ingredients. To measure an ingredient’s weight, place a container (i.e., mixing bowl) on top of the scale and hit the “tare” or “zero” button. This will reset the balance to zero, so it does not include the container’s weight.

Now, you can add an ingredient into the container to determine its weight in grams or ounces. If you want to add another ingredient, you can press the “tare” button again to offset the weight of the container and the first ingredient. Add your desired amount of the second ingredient and repeat the process until you have included all your dry ingredients.

When using volume measurements, you will need graduated measuring cups and spoons to get an accurate measurement. Based on standard U.S. units, one cup is equal to 16 tablespoons. The number of grams in a measuring cup varies based on the ingredient density.

FAQs About Gram to Ounce Conversions

Here, we will answer people’s most frequently asked questions about gram-to-ounce conversions. 

Note: Before we get to the most FAQs, it is important to remember that there are 28.3495 grams in one ounce of any object (except precious metals and gems). For example, an ounce of feathers has the same amount of grams as an ounce of lead.

How Many Grams in a Troy Ounce?

Troy ounces are used to measure the weight of precious metals and gems. One troy ounce is equal to 31.1035 grams. In comparison, a standard avoirdupois ounce is 28.3495 grams, slightly less than a troy ounce.

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How Many Grams in an Ounce of Gold?

Since precious metals, such as gold, are measured by the troy ounce, there are 31.1035 grams of gold in a troy ounce of gold.

How Many Grams in an Ounce of Silver?

Silver, like gold, is a precious metal that is measured by the troy unit of weight. A troy ounce of silver weighs 31.1035 grams.

How Many Grams in an Ounce of Weed?

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Digital weight weighing marijuana buds isolated on white background. A gram of cannabis on digital scale.

When buying weed, you may notice differences in gram-to-ounce conversions. Cannabis weight measurements vary slightly from traditional units of weight. Since there are 28.3495 grams in an ounce, dispensaries round down that number to 28 grams when selling ounces of cannabis flower. For practical purposes, there are 28 grams in an ounce of weed.

Keep in mind that purchasing limits for flower vary by state. Common weed measurements include one gram, one eighth (3.5 grams), one quarter (7 grams), one half (14 grams), and one ounce (28 grams). As you can see, the gram equivalents of fractions of an ounce are rounded down to simplify the purchasing/selling process.

On a similar note, many people ask, “how many grams of THC is in an ounce of weed?”. The number of grams of THC in an ounce of cannabis flower depends on various factors, including the strain genetics and its growing environment. Generally, cannabis flower has 15-25% THC.

How Many Grams in an Ounce of Protein?

There are 28.3495 grams in an ounce of protein. According to the U.S. Department of Agriculture, one scoop of whey protein powder isolate is about 29 grams and has about 17 grams of protein. The amount of the powder and protein per scoop varies by brand.

How Many Grams Are in an Ounce of Meat?

Since meat is measured in avoirdupois weight, there are 28.3495 grams in an ounce of meat.

How Many Grams in an Ounce of Chicken?

Chicken, like other meats, is measured in avoirdupois weight. There are 28.3495 grams in an ounce of chicken.

How Many Grams in an Ounce of Chocolate?

There are 28.3495 grams in an ounce of chocolate.

How Many Grams in an Ounce of Mushrooms?

There are 28.3495 grams in an ounce of mushrooms.

How Many Grams in an Ounce of Water?

There are about 29.6 grams in a fluid ounce of water.

How Many Grams in a Cup?

Determining the number of grams in a cup is a bit tricky. The number of grams in a cup depends on the density of the ingredient.

How Many Grams in a Pound?

There are 453.592 grams per pound.

How Many Grams in a Kilogram?

There are 1,000 grams in one kilogram.

How Many Milligrams in a Gram?

One gram is equal to 1,000 milligrams.

How Many Micrograms in a Gram?

There are 1 million micrograms in a gram.

Final Thoughts on How Many Grams in an Ounce

Converting units of weight from one metric to another does not have to be complicated. If you want to know how many grams are in an ounce, multiply 28.3495 per ounce. If you want to know how many ounces are in a gram, divide the number of ounces by 16.

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