Ounces to Grams Converter
1 avoirdupois ounce equals exactly 28.349523125 grams, so 8 oz is 226.796185 g and 16 oz is 453.59237 g. This ounces to grams converter helps you switch between US customary weight and metric weight without guessing. Enter a value in ounces or grams, choose the output unit, and the tool converts it with the exact avoirdupois factor used for everyday weight. That makes it useful for recipes, food labels, postage, meal prep, coffee dosing, ingredient purchasing, and any situation where a package, chart, or label uses a different weight system than the one you want to read. The key detail is that this page covers the standard weight ounce, not a fluid ounce. If you are converting dry ingredients, meat portions, nutrition label serving sizes, or small shipping weights, this is usually the ounce you need. If you are measuring volume such as milk, oil, or water in fluid ounces, you need a different tool because volume only converts to grams when you know density.
Quick answer
1 avoirdupois ounce is exactly 28.349523125 grams, which is the official factor used by this converter.
Result
226.796185 grams
Unit standard
Avoirdupois weight ounce
Exact rate
1 oz = 28.349523125 g
What this tells you
- •1 avoirdupois ounce is exactly 28.349523125 grams, which is the official factor used by this converter.
- •To convert ounces to grams, multiply the ounce value by 28.349523125.
- •To convert grams to ounces, divide the gram value by 28.349523125.
- •The tool accepts decimal values, so you can convert amounts like 0.75 oz, 2.5 oz, or 12.4 g without any extra steps.
- •This is the standard ounce used for food weight, parcels, and most everyday packaged goods in the US.
- •It does not convert fluid ounces because fluid ounces measure volume, not mass.
How to Use
- 1Enter the weight you want to convert in the Value field. Whole numbers and decimals both work, so you can type 8, 0.75, or 500 depending on what you are measuring.
- 2Choose the unit you already have in the From menu. Pick ounces if the label, recipe, or package starts in oz, or pick grams if your starting number is already metric.
- 3Choose the unit you want in the To menu. Most cooking conversions in US recipes go from ounces to grams, while food labels and imported product specs often need grams to ounces.
- 4Read the converted value in the result area. The tool formats the answer for quick reading while still using the exact conversion factor behind the scenes.
- 5If you are entering the result into a recipe card, shipping form, or printed label, follow that source's rounding rule after converting. Many labels round to one or two decimals even when the exact value has more digits.
How It Works
Formula
g = oz × 28.349523125The converter uses grams as the base unit. To go from ounces to grams, multiply the ounce amount by 28.349523125 because one avoirdupois ounce is defined as exactly that many grams. To go from grams to ounces, divide the gram amount by 28.349523125. In plain terms, the tool first turns your input into grams, then divides by the target unit's gram value if needed. For example, 4 oz × 28.349523125 = 113.3980925 g. Going the other way, 100 g ÷ 28.349523125 = 3.527396194958 oz, which the tool displays as 3.527396 oz after rounding for readability.
Calculation note: values are processed in the order shown above, using the current input units.
Worked Examples
Convert 8 oz of chocolate chips to grams
Multiply 8 by 28.349523125 and you get 226.796185 g. In a kitchen, you would usually round that to 226.8 g or 227 g depending on the recipe format. The exact value is useful when you want your notes to match the converter and keep repeated batches consistent.
Convert a 500 g parcel to ounces
Divide 500 by 28.349523125 and the result is 17.63698097479 oz. The tool rounds the displayed answer to 17.636981 oz. This is a practical check when a shipping form expects ounces but the scale on your desk shows grams.
Convert a 0.75 oz spice packet to grams
A three-quarter ounce packet weighs 0.75 × 28.349523125 = 21.26214234375 g. The displayed result becomes 21.262142 g after rounding. This is the kind of conversion that helps when a US recipe lists a small seasoning amount in ounces but your kitchen scale reads only grams.
Convert 12 g to ounces for a supplement scoop
Divide 12 by 28.349523125 and you get 0.423287543394 oz. The tool shows 0.423288 oz. Small values like this are a good reminder that ounces can become awkward for fine measurements, which is one reason grams are often easier for powders, coffee, and nutrition tracking.
Convert a 16 oz bag to grams
Multiply 16 by 28.349523125 to get 453.59237 g exactly. Many people recognize 16 oz as one pound, so this example is a fast reality check when a bag of beans, flour, or frozen fruit needs to be compared with metric packaging. If your package says about 454 g, that rounded label is consistent with the exact ounce-to-gram conversion.
Common Ounces to Grams Reference
Quick lookup values for everyday food, portion, and package weights using the exact avoirdupois ounce.
| Weight | Exact grams | Typical use |
|---|---|---|
| 1 oz | 28.349523125 g | Single serving, snack portion, spice amount |
| 4 oz | 113.3980925 g | Butter stick half-pound recipe step, meat portion |
| 8 oz | 226.796185 g | Chocolate chips, cheese block, coffee bag |
| 12 oz | 340.1942775 g | Beverage can net weight, pasta box |
| 16 oz | 453.59237 g | One-pound bag of food or ingredients |
| 32 oz | 907.18474 g | Large bulk bag, freezer item, family pack |
These values use the standard avoirdupois ounce. Precious metals often use troy ounces instead, and liquids often use fluid ounces, so do not swap those units into this table.
Common mistakes
- Mixing up ounces of weight with fluid ounces of volume. An ounce on a dry goods label is mass, while a fluid ounce on a measuring cup is volume. You need density to move from fluid ounces to grams.
- Using the rough shortcut of 28 g per ounce for tasks that need closer precision. That shortcut is fine for mental math, but repeated rounding can create noticeable differences in recipes, labels, and shipping entries.
- Assuming every ounce means the same system. Troy ounces are used for precious metals and are heavier than the standard ounce used in cooking and packaging.
- Rounding too early in a multi-step calculation. Convert first, keep the full result while you work, and round only when you are ready to record or print the final value.
- Typing the right number with the wrong direction selected. Converting 500 g to oz is not the same as converting 500 oz to g, so always check both menus before copying the result.
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