Ounces to Grams Converter

Need to convert ounces to grams quickly and accurately? Our free Ounces to Grams Converter lets you convert any standard weight in ounces (oz) into grams (g) instantly.

Whether you’re following a recipe, checking food packaging, comparing product weights, preparing a shipment, or simply need a quick unit conversion, this ounces to grams calculator provides an easy way to get the answer.

For the standard avoirdupois ounce used for everyday weight measurements, 1 ounce equals exactly 28.349523125 grams.

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How Many Grams Are in an Ounce?

1 ounce = 28.349523125 grams

For everyday calculations, this is commonly rounded to:

1 oz ≈ 28.35 g

So, if you need to know how many grams are in an ounce, the quick answer is approximately 28.35 grams.

The standard conversion relationship is:

1 oz = 28.349523125 g

This is the standard avoirdupois ounce used for general weight measurements such as food, products and postage.

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Ounces to Grams Formula

The ounces to grams formula is straightforward:

Grams = Ounces × 28.349523125

For most everyday calculations, you can use:

Grams = Ounces × 28.35

Example: Convert 5 Ounces to Grams

To convert 5 ounces:

5 × 28.349523125 = 141.747615625 g

Therefore:

5 oz ≈ 141.75 g

Example: Convert 8 Ounces to Grams

8 × 28.349523125 = 226.796185 g

Therefore:

8 oz ≈ 226.80 g

Using the exact conversion factor gives more precise results, while 28.35 is usually sufficient for cooking and everyday measurements.

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How to Convert Ounces to Grams

You can convert ounces to grams in three simple steps:

1. Take the weight in ounces.
2. Multiply the ounce value by 28.349523125.
3. The answer is the equivalent weight in grams.

Quick Example

Suppose you have 4 ounces.

4 × 28.349523125 = 113.3980925 g

So:

4 ounces ≈ 113.40 grams

Our online oz to grams converter performs this calculation automatically.

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Ounces to Grams Conversion Chart

Here’s a useful ounces to grams chart for common values:

These values are based on the standard avoirdupois ounce-to-gram relationship.

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Common Ounces to Grams Conversions

1 Ounce to Grams

1 oz = 28.3495 g

So, 1 ounce is approximately 28.35 grams.

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2 Ounces to Grams

2 oz = 56.6990 g

Approximately:

2 oz ≈ 56.70 g

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4 Ounces to Grams

4 oz = 113.3981 g

Approximately:

4 oz ≈ 113.40 g

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5 Ounces to Grams

5 oz = 141.7476 g

Approximately:

5 oz ≈ 141.75 g

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8 Ounces to Grams

8 oz = 226.7962 g

Approximately:

8 oz ≈ 226.80 g

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10 Ounces to Grams

10 oz = 283.4952 g

Approximately:

10 oz ≈ 283.50 g

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12 Ounces to Grams

12 oz = 340.1943 g

Approximately:

12 oz ≈ 340.19 g

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16 Ounces to Grams

16 oz = 453.5924 g

This is also approximately 1 pound, because one pound contains 16 standard ounces.

Therefore:

16 oz ≈ 453.59 g

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32 Ounces to Grams

32 oz = 907.1847 g

Therefore:

32 oz ≈ 907.18 g

That’s just under 1 kilogram.

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Ounces to Grams for Cooking and Baking

One of the most common reasons people need an ounces to grams conversion is cooking.

Recipes from different countries may use different measurement systems. A recipe might list an ingredient in ounces while your kitchen scale displays grams.

For example:

• 1 oz ≈ 28.35 g
• 2 oz ≈ 56.70 g
• 4 oz ≈ 113.40 g
• 8 oz ≈ 226.80 g
• 12 oz ≈ 340.19 g
• 16 oz ≈ 453.59 g

Using grams can be particularly helpful for baking because measuring ingredients by weight can provide more consistent results than measuring by volume.

For everyday kitchen measurements, rounding to two decimal places is generally convenient.

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Ounces to Grams for Food and Nutrition

Food packages may list weight in ounces, grams, or both depending on the market.

For example, if a package contains 8 oz of food:

8 oz ≈ 226.80 g

Similarly:

4 oz ≈ 113.40 g

This can help when comparing serving sizes, food packages and nutrition information that use different units.

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Ounces to Grams for Shipping and Postage

Weight conversions are also useful when dealing with packages and mail.

If a package weighs 10 oz, its metric equivalent is:

10 × 28.349523125 = 283.495 g

So the package weighs approximately:

283.5 grams

Converting ounces to grams can help when product specifications, shipping information or a digital scale use different measurement systems.

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Ounces and Grams: What’s the Difference?

An ounce (oz) and a gram (g) are both units used to measure mass, but they belong to different measurement systems.

• Gram (g): Metric unit of mass
• Ounce (oz): Common US customary and imperial unit of weight
• 1 oz: 28.349523125 g
• 1 g: Approximately 0.035274 oz

The gram is part of the metric system, while the everyday ounce is commonly encountered in US customary measurements.

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Standard Ounce vs Troy Ounce

An important detail is that not every ounce represents the same amount of grams.

The standard ounce used for everyday weight measurements is the avoirdupois ounce:

1 avoirdupois oz = 28.349523125 g

A troy ounce, which is commonly used for precious metals such as gold and silver, is different:

1 troy oz ≈ 31.1035 g

Therefore, this ounces to grams converter uses the standard avoirdupois ounce for general weight conversion.

If you’re dealing with precious metals, make sure you’re using the appropriate troy-ounce conversion instead.

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Ounce vs Fluid Ounce

A common source of confusion is the difference between an ounce and a fluid ounce.

A standard ounce in this converter refers to a unit of mass/weight.

A fluid ounce (fl oz) is a unit of volume.

Therefore:

1 oz cannot automatically be treated as 1 fl oz.

Converting fluid ounces to grams requires knowing the substance because volume-to-mass conversion depends on density.

For example, the mass of one fluid ounce of water is different from the mass of one fluid ounce of oil.

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Quick Ounces to Grams Reference

This quick reference is useful when you only need a common oz to g conversion without doing the calculation yourself.

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How to Convert Grams to Ounces

The reverse conversion is also simple.

To convert grams to ounces:

Ounces = Grams ÷ 28.349523125

For example, to convert 100 grams to ounces:

100 ÷ 28.349523125 = 3.5274 oz

Therefore:

100 g ≈ 3.53 oz

If you need this conversion regularly, use our Grams to Ounces converter for an instant result.

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A Simple Mental Shortcut

For a quick estimate, you can multiply ounces by 28.

For example:

4 oz × 28 ≈ 112 g

The more precise result is:

4 oz = 113.398 g

So the 28× shortcut is useful for rough mental calculations, while the full 28.349523125 factor should be used when accuracy matters.

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Why Use Our Ounces to Grams Converter?

Our free online converter makes weight conversions quick and convenient.

You can use it to:

• Convert ounces to grams instantly
• Convert oz to g without manual calculations
• Check common ounce-to-gram values
• Follow cooking and baking recipes
• Compare food and product weights
• Understand metric and imperial measurements
• Check shipping and package weights
• Work with decimal ounce values
• Get quick and accurate conversion results

Simply enter the number of ounces and let the converter calculate the equivalent grams.

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Frequently Asked Questions

How many grams are in 1 ounce?

1 standard ounce equals 28.349523125 grams, commonly rounded to 28.35 grams.

What is 2 ounces in grams?

2 ounces ≈ 56.70 grams.

What is 4 ounces in grams?

4 ounces ≈ 113.40 grams.

What is 5 ounces in grams?

5 ounces ≈ 141.75 grams.

What is 8 ounces in grams?

8 ounces ≈ 226.80 grams.

What is 10 ounces in grams?

10 ounces ≈ 283.50 grams.

What is 16 ounces in grams?

16 ounces ≈ 453.59 grams, which is approximately one pound.

How do I convert ounces to grams?

Multiply the ounce value by 28.349523125.

Grams = Ounces × 28.349523125

Is 1 ounce exactly 28 grams?

No. One standard ounce is 28.349523125 grams. Saying 28 grams is only a convenient approximation.

Is an ounce the same as a fluid ounce?

No. A standard ounce measures mass, while a fluid ounce measures volume. They are different measurements.

Does this converter use troy ounces?

No. This converter uses the standard avoirdupois ounce, which is the common ounce used for everyday weight measurements. Troy ounces are used for precious metals and have a different gram equivalent.

How many grams are in 1 pound?

One standard pound equals approximately 453.59237 grams. Since a pound contains 16 ounces, this also means 16 oz ≈ 453.59 g.

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