Convert ounces to grams
Type a value in ounces and read the result in grams. One avoirdupois ounce is 28.35 grams, so a 14-ounce can weighs 396.89 grams. The switch under the fields also selects the troy ounce used for gold and silver. One ounce then comes to 31.10 grams.
How many grams are in one ounce?
One avoirdupois ounce is 28.349523125 grams [1], rounded to 28.35 grams in practice. You multiply the number of ounces by that value, which gives the formula: grams = ounces × 28.349523125.
The value follows straight from the pound definition adopted in 1959. The pound was fixed at 0.45359237 kilograms, and the ounce is one sixteenth of it.
Three figures come out of that formula more often than any others. Four ounces is 113.4 grams, the weight of a stick of butter. Eight ounces gives 226.8 grams. Sixteen ounces, a full pound, is 453.59 grams.
The input field also takes common fractions. Type half an ounce as 1/2 and you get 14.17 grams. Type an eighth as 1/8 and the converter returns 3.54 grams.
Is 1 ounce 28 or 31 grams?
Both figures describe real units, and the choice between them depends on what you are weighing. The avoirdupois ounce weighs 28.3495 grams and covers food, parcels, cosmetics and sports equipment. The troy ounce weighs 31.1035 grams [1] and serves precious metals alone.
The goods decide. A can, a bag of coffee and a pair of gloves go through 28.3495. Gold, silver and platinum go through 31.1035.
For precious metals a written market rule stands behind it. The London Bullion Market Association requires a bar's weight to be stated in troy ounces, in multiples of 0.025 of an ounce [2]. Exchange quotes and mint price lists use the same unit.
The Ounce type switch under the fields handles this. Once you pick Troy (oz t), the suffix beside the input changes from oz to oz t. One ounce then comes to 31.1035 grams.
What is the fluid ounce on a drink label?
The fluid ounce, written fl oz, measures volume. You meet it on drinks, cosmetics and perfumes, wherever the capacity of the container is what counts.
It also comes in two values. The US fluid ounce is 29.5735295625 millilitres, and the imperial one used in the United Kingdom is 28.4130625 millilitres.
Volume stated that way is handled by the ounces to millilitres converter, which has its own US and UK switch. This tool handles the ounce of mass, the one a scale shows and a label calls net wt.
Ounces to grams conversion table
| Avoirdupois ounces | Grams |
|---|---|
| 1/8 oz | 3.54 g |
| 1/4 oz | 7.09 g |
| 1/2 oz | 14.17 g |
| 3/4 oz | 21.26 g |
| 1 oz | 28.35 g |
| 1.5 oz | 42.52 g |
| 2 oz | 56.7 g |
| 3 oz | 85.05 g |
| 4 oz | 113.4 g |
| 5 oz | 141.75 g |
| 6 oz | 170.1 g |
| 7 oz | 198.45 g |
| 8 oz | 226.8 g |
| 10 oz | 283.5 g |
| 12 oz | 340.19 g |
| 14 oz | 396.89 g |
| 14.5 oz | 411.07 g |
| 15 oz | 425.24 g |
| 16 oz | 453.59 g |
| 20 oz | 566.99 g |
| 24 oz | 680.39 g |
| 28 oz | 793.79 g |
| 32 oz | 907.18 g |
Sixteen ounces is exactly one pound, which is why 16 oz and 453.59 g describe the same mass. The grams to ounces converter handles the opposite direction.
How much do American pack sizes in ounces weigh?
| Weight on the pack | Grams | What comes in it |
|---|---|---|
| 4 oz | 113.4 g | A stick of butter, a quarter pound |
| 8 oz | 226.8 g | A block of cream cheese, a small can |
| 10.5 oz | 297.67 g | A No. 1 (Picnic) can, condensed soups |
| 12 oz | 340.19 g | A bag of coffee, a bag of chocolate chips |
| 14 oz | 396.89 g | A No. 300 can, diced tomatoes and beans |
| 16 oz | 453.59 g | A full No. 300 can, a pound pack |
| 20 oz | 566.99 g | A No. 2 can, pineapple and fruit in syrup |
| 26 oz | 737.09 g | A No. 2 1/2 can, lower end |
| 30 oz | 850.49 g | A No. 2 1/2 can, upper end |
| 51 oz | 1,445.83 g | A No. 3 Cyl can, food service size |
| 96 oz | 2,721.55 g | A No. 10 can, food service size |
The can names and weight ranges come from the Common Can and Jar Sizes table published by the USDA [3]. The No. 2 1/2 and No. 300 sizes are given as ranges there, because the same can body holds products of different densities.
How much do boxing gloves in ounces weigh?
| Glove size | Weight of one glove |
|---|---|
| 8 oz | 226.8 g |
| 10 oz | 283.5 g |
| 12 oz | 340.19 g |
| 14 oz | 396.89 g |
| 16 oz | 453.59 g |
| 18 oz | 510.29 g |
A 16 oz glove weighs exactly one pound, because a pound holds 16 ounces. The same notation appears on shin guards and on heavy bags.
The avoirdupois ounce, the troy ounce and the fluid ounce side by side
| Type of ounce | Value | Symbol | Where you meet it |
|---|---|---|---|
| Avoirdupois | 28.349523125 g | oz | Food, parcels, cosmetics, sports equipment |
| Troy | 31.1034768 g | oz t | Gold, silver, platinum, exchange quotes |
| US fluid | 29.5735295625 ml | fl oz | Drinks, perfumes, liquid cosmetics |
| Imperial fluid | 28.4130625 ml | fl oz | Drinks and recipes from the UK market |
The apothecaries' ounce is another name for the troy ounce and shares its mass of 31.1034768 grams. The volumes in the bottom two rows are handled by the ounces to millilitres converter.
How do you convert ounces to grams in the converter?
Below is the order in which the fields, the switch and the buttons are used.
Type the value in ounces
Enter the number of ounces in the top field. The field reads a decimal point and a comma alike, and it also accepts common fractions. You can type 1.5, or 1,5, or 1 1/2, and the result comes to 42.52 grams every time.Pick the ounce type
The Ounce type switch sits under the fields. The Avoirdupois (oz) option handles packaging, recipes and sports equipment, so shopping and parcels stay on the default setting. The Troy (oz t) option handles precious metals. The suffix beside the input shows which one is active.Read and copy the result
The result appears in the lower field as you type. The Copy result button puts it on the clipboard, and Clear all empties both fields before the next conversion.Reverse the direction
The Swap order button opens the grams to ounces converter, with its gold bar table and its birth weight table in pounds and ounces.
Sources
- NIST Guide to the SI, Appendix B.9: Factors for units listed by kind of quantity — NIST
- Good Delivery Rules: Technical Specifications — London Bullion Market Association
- Food Buying Guide, Table 2: Common Can and Jar Sizes — USDA Food and Nutrition Service
Every figure in the tables was computed from the unit definitions and checked arithmetically before publication. Historical values and the names of local units come from the sources listed above.
Content last reviewed: · written and checked by the Arteon team
Frequently asked questions about converting ounces to grams
How many grams are in 1 ounce?
One avoirdupois ounce is 28.349523125 grams, written as 28.35 grams in practice. That ounce covers food, parcels and equipment. The troy ounce is a separate unit meant for precious metals, and it weighs 31.1034768 grams.
How many grams are in 8 ounces?
Eight ounces is 226.8 grams. It takes one multiplication: 8 ounces times 28.349523125. That is the weight of a block of cream cheese and of a small can. The European pack of the same product usually holds 250 grams, which is 23.2 grams more.
How many grams are in 16 ounces?
Sixteen ounces is 453.59 grams, which is exactly one pound. The sum comes down to multiplying 16 by 28.349523125. For comparison, a whole kilogram comes to 35.274 ounces.
How many grams are in 4 ounces?
Four ounces is 113.4 grams, a quarter of a pound. That is the weight of a stick of butter, the form recipes call for. When a recipe asks for two sticks, it means 226.8 grams of butter.
What is the formula for converting ounces to grams?
Multiply the number of ounces by the mass of one ounce, which is 28.349523125. The full formula reads: grams = ounces × 28.349523125. For the troy ounce, put 31.1034768 in the same place. Going the other way, divide the grams by 28.349523125 and you are back in ounces.
How many grams are in an ounce of gold?
An ounce of gold is a troy ounce and weighs 31.1034768 grams. To have the converter return that value, set the Troy (oz t) option in the Ounce type switch. Small investment bars, on the other hand, are stamped in grams, most often as 10 g, 50 g, 100 g or 1 kg. That direction is handled by the grams to ounces converter.
How much do 12 oz boxing gloves weigh?
A 12 oz glove weighs 340.19 grams, and a full pair 680.39 grams. For comparison, a 10 oz glove weighs 283.5 grams. A 16 oz glove weighs 453.59 grams, which is exactly one pound. The full range of sizes sits in the table above.
Is the ounce of mass the same as the fluid ounce?
The ounce of mass, written oz, describes weight and this converter handles it. The fluid ounce, written fl oz, describes volume. The US fluid ounce holds 29.5735 millilitres and the imperial one 28.4131 millilitres. Volume is handled by the ounces to millilitres converter.
Can you type a fraction into the converter?
Yes, the field reads common fractions. It takes 1/2 and 1/8 alike, along with mixed numbers such as 1 3/4. Recipes state weights in exactly that form, so the result arrives straight away, without turning the fraction into a decimal first.
How many ounces are in an American can of tomatoes?
Two sizes turn up most often. The smaller holds 14 ounces, which is 396.89 grams. The larger holds 28 ounces, which is 793.79 grams. The USDA table describes the first as a No. 300 can, and the second falls inside the No. 2 1/2 size.
How do you convert a weight given in pounds and ounces?
First bring the whole thing down to ounces. Multiply the pounds by 16 and add the ounces from the notation. Only then multiply that sum by 28.349523125. For a weight of 7 lb 10 oz it works out like this: seven times sixteen is 112, adding ten gives 122 ounces, and the multiplication returns 3,458.6 grams. The notation itself is broken down by the ounces to pounds converter.
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