Ounces to Grams Converter
Convert ounces to grams and grams to ounces instantly. Quick reference table for common weight conversions.
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oz
28.35 g
Equivalent in pounds
0.063 lb
Equivalent in kilograms
0.0283 kg
Ounces to Grams Quick Reference
| Ounces | Grams | Pounds | Kilograms |
|---|---|---|---|
| 0.5 | 14.2 | 0.031 | 0.0142 |
| 1 | 28.3 | 0.063 | 0.0283 |
| 2 | 56.7 | 0.125 | 0.0567 |
| 3 | 85.0 | 0.188 | 0.0850 |
| 4 | 113.4 | 0.250 | 0.1134 |
| 5 | 141.7 | 0.313 | 0.1417 |
| 6 | 170.1 | 0.375 | 0.1701 |
| 8 | 226.8 | 0.500 | 0.2268 |
| 10 | 283.5 | 0.625 | 0.2835 |
| 12 | 340.2 | 0.750 | 0.3402 |
| 16 | 453.6 | 1.000 | 0.4536 |
| 32 | 907.2 | 2.000 | 0.9072 |
Ounces to grams converter. Weight ounces to grams, pounds and kilograms.
This converter multiplies ounces by 28.3495 to get grams, and divides by the same factor going back, showing pounds and kilograms next to every result. It works in weight ounces (avoirdupois) — the ounce on a kitchen scale and a food package — never the fluid ounce.
What Is an Ounce in Grams?
A stick of American butter weighs 4 oz, and 4 oz is 113.4 g. That is why the metric column of a US recipe so often reads 113 g, 227 g or 340 g instead of anything round: those are 4 oz, 8 oz and 12 oz translated one decimal at a time. The ounce sets the numbers and the grams inherit them, which is the single most useful thing to understand about this conversion.
One avoirdupois ounce — the ounce on a kitchen scale, a bag of flour and a postal label — is 28.3495 g, and that is the factor this converter applies. The digits are not arbitrary. The 1959 International Yard and Pound Agreement fixed the pound at exactly 0.45359237 kg, and an ounce is one sixteenth of a pound, so an ounce is exactly 28.349523125 g. Every familiar figure is a rounded face of that definition: 1 oz = 28.35 g, 16 oz = 1 lb = 453.592 g, and 1 kg = 2.204624 lb. Running it backwards, 1 g = 0.035274 oz, which is why 100 g lands on the easy-to-remember 3.5274 oz.
Three different units answer to the name "ounce," and only one of them belongs on this page. The weight ounce (28.3495 g) is the kitchen, grocery and postage unit. The US fluid ounce is 29.574 ml and measures volume rather than weight, which is why a jug marked 8 fl oz and a block marked 8 oz are describing unrelated quantities. The troy ounce is 31.1035 g and exists for gold, silver and platinum — roughly 9.7% heavier than the kitchen ounce. This converter handles the weight ounce only, and the notice above its reference table says so out loud, because collapsing the three is the most expensive mistake in this corner of measurement.
The convenient part is that neither ounces nor grams care what you are weighing. Both are units of weight, so the conversion is one fixed multiplication: an ounce of flour, an ounce of honey and an ounce of grated parmesan are all 28.3495 g. That is what separates this page from a cups-to-grams question, which has no answer at all until you name the ingredient — a US cup of flour weighs 125 g while a cup of rolled oats weighs only 80 g, the same space holding very different mass. The gram itself is the metric unit that makes all of this comparable: one thousandth of a kilogram, the everyday face of the SI base unit of mass, and the unit almost every recipe written outside the United States uses. American retail packaging kept the ounce; the rest of the world's kitchens moved to grams, and this converter is the bridge between the two.
How to Use the Ounces to Grams Converter
The converter opens in the ounces to grams direction with 1 in the field, so the first thing on screen is the answer to the most-asked version of the question: 1 oz = 28.35 g.
1. Type the weight into the single input field. The result updates as you type and displays to two decimals.
2. Read the two cards underneath. They restate the same weight in pounds (three decimals) and kilograms (four decimals), so 8 oz appears as 226.8 g, 0.5 lb and 0.2268 kg at once.
3. Press the swap button to reverse the direction. The field label changes from Ounces to Grams, and the current result carries across into the input, so you can send a figure back through and watch it return.
The field takes up to 10,000 oz — that is 283,495 g, or 625 lb — and just under 1,000,000 g in the other direction, about 35,274 oz. Below the cards sits a 12-row table running from 0.5 oz to 32 oz, with grams, pounds and kilograms on every row; when you are converting ounces to grams and your input matches one of those amounts, that row is highlighted so you can see the neighbouring values at the same time.
To run the arithmetic by hand, multiply ounces by 28.3495, or divide grams by 28.3495 to come back. Two shortcuts are worth keeping. Because 4 oz is 113.4 g, you can divide the ounces by 4 and multiply by 113.4: 8 oz ÷ 4 = 2, then 2 × 113.4 = 226.8 g. In the other direction, anchor on 100 g = 3.53 oz — half of that is 50 g = 1.76 oz, and ten times it is 1 kg = 35.27 oz. Neither shortcut replaces the converter for awkward numbers, but both are enough to sanity-check a result before you commit an ingredient to the bowl.
The Ounces to Grams Formula
- = The weight you start from, in avoirdupois ounces
- = The converted weight, in grams
- = Grams in one ounce — the constant this converter uses, shortened from the exact 28.349523125 g
An ounces-to-grams conversion is a single multiplication, because ounces and grams both measure weight and both agree that zero means nothing. There is no offset to add, as there would be with temperature, and no density to look up, as there would be with cups. Grams = ounces × 28.3495. Reverse it by dividing: ounces = grams ÷ 28.3495, which is the same as multiplying by 0.035274.
Where the constant comes from matters as soon as you care about the last digit. The pound is defined as exactly 0.45359237 kg, an ounce is exactly one sixteenth of a pound, so an ounce is exactly 28.349523125 g. This converter carries 28.3495, which is short by 0.000023 g per ounce. Even at the field's 10,000 oz ceiling that shortfall totals about 0.23 g out of 283,495 g — orders of magnitude below what any kitchen or postal scale can resolve. The relationships inside each system stay exact: 16 oz is exactly 1 lb, 1 oz is exactly 0.0625 lb, and 1 oz is 0.0283495 kg as the tool rounds it.
Grams to ounces at four decimals, so you can see the digits that the two-decimal result card hides:
| Grams | Ounces | Pounds |
|---|---|---|
| 10 g | 0.3527 oz | 0.022 lb |
| 25 g | 0.8818 oz | 0.055 lb |
| 30 g | 1.0582 oz | 0.066 lb |
| 50 g | 1.7637 oz | 0.110 lb |
| 100 g | 3.5274 oz | 0.220 lb |
| 113 g | 3.9860 oz | 0.249 lb |
| 125 g | 4.4092 oz | 0.276 lb |
| 200 g | 7.0548 oz | 0.441 lb |
| 227 g | 8.0072 oz | 0.500 lb |
| 250 g | 8.8185 oz | 0.551 lb |
| 300 g | 10.5822 oz | 0.661 lb |
| 400 g | 14.1096 oz | 0.882 lb |
| 500 g | 17.6370 oz | 1.102 lb |
| 1000 g | 35.2740 oz | 2.205 lb |
Two of those rows are worth memorising. 100 g = 3.5274 oz is the anchor for reading any metric package, and 227 g = 8.0072 oz is the row that explains American butter: half a pound, two 4 oz sticks, one cup. The 0.0072 is the tell that 227 g was never the original measurement — 8 oz is 226.8 g, and 227 is that figure rounded up for print.
Ounces to Grams Reference Table
| Ounces | Grams | Pounds | Kilograms |
|---|---|---|---|
| 0.5 oz | 14.2 g | 0.031 lb | 0.0142 kg |
| 1 oz | 28.3 g | 0.063 lb | 0.0283 kg |
| 2 oz | 56.7 g | 0.125 lb | 0.0567 kg |
| 3 oz | 85.0 g | 0.188 lb | 0.0850 kg |
| 4 oz | 113.4 g | 0.250 lb | 0.1134 kg |
| 5 oz | 141.7 g | 0.313 lb | 0.1417 kg |
| 6 oz | 170.1 g | 0.375 lb | 0.1701 kg |
| 8 oz | 226.8 g | 0.500 lb | 0.2268 kg |
| 10 oz | 283.5 g | 0.625 lb | 0.2835 kg |
| 12 oz | 340.2 g | 0.750 lb | 0.3402 kg |
| 16 oz | 453.6 g | 1.000 lb | 0.4536 kg |
| 32 oz | 907.2 g | 2.000 lb | 0.9072 kg |
Worked Ounce and Gram Conversions
4 oz of cheese, weighed in grams
A US recipe asks for 4 oz of grated cheese and your scale reads grams. Type 4 with the converter pointing from ounces to grams and it returns 113.4 g, with 0.25 lb and 0.1134 kg on the cards below — the quarter pound that the 4 oz was describing all along. Weigh 113 g and you are within half a gram of the recipe. Double the dish and you need 8 oz, which the same converter puts at 226.8 g. Worth knowing: some conversion pages answer "4 oz of cheddar" with about 117 g, a figure that comes from treating the ounce as a fluid ounce and measuring the space the cheese fills rather than its weight. On a scale, 4 oz of any cheese is 113.4 g.
500 g of flour on a scale that only reads ounces
A European bread recipe calls for 500 g of flour and the only scale in the kitchen shows ounces. Swap the converter to grams and ounces, type 500, and it returns 17.64 oz with 1.102 lb on the card underneath. Landing that on an ounce scale is the real problem: an eighth of an ounce is 3.5 g (28.3495 ÷ 8), so the closest mark to 17.64 oz is 17.625 oz, about 0.3 g away. For bread flour that is irrelevant. What the exercise really shows is why bakers switch the display to grams — whole grams resolve 28 times finer than whole ounces, and the recipe scales by plain multiplication instead of eighths.
227 g of butter is 8 oz — and two sticks
Type 227 in the grams to ounces direction and the converter returns 8.01 oz, 0.5 lb and 0.227 kg. The 0.01 is the giveaway: 8 oz is 226.8 g, so the 227 g printed in recipes is that value rounded up rather than a measurement of its own. In US terms it is half a pound of butter, which is two 4 oz sticks or one cup — and the universal cooking converter lists 1 cup of butter at 227 g, arriving at the same weight from the volume side. So when a recipe offers you "1 cup (227 g)" and "2 sticks" in the same line, all three phrases mean 8 oz, and any of them can be put on a scale instead of into a measuring cup.
A 12 oz bag scaled up by half
Chocolate chips, nuts and dried fruit are sold in 12 oz bags in the US, and 12 oz is 340.2 g. Scaling that recipe by 1.5 means 18 oz, which the converter puts at 510.29 g, 1.125 lb and 0.5103 kg. Doing the multiplication on the metric side is easier — 340.2 × 1.5 = 510.3 — and it exposes how quickly tidy ounce figures stop being tidy once you scale them. It also shows what rounding costs at this size: starting from a rounded 340 g leaves you 0.3 g short, while using a flat 28 g per ounce leaves you 6.3 g short, because 18 × 28 = 504 g against the true 510.29 g.
32 oz at the butcher counter
A counter priced by the pound and a recipe written in kilograms meet on the last row of the reference table: 32 oz is 907.2 g, which is exactly 2 lb and 0.9072 kg. Ask for 2 lb and you are 92.8 g short of a kilogram — fine for a stew, not fine for a cure where salt is a percentage of the meat's weight. This is also where the lazy 28 g per ounce shortcut finally bites. 32 × 28 = 896 g, which is 11.2 g light, and at 6 g of table salt per teaspoon that gap is nearly two teaspoons. The same rounding at 1 oz costs 0.35 g and nobody would ever notice.
100 g of coffee, read in ounces
European and Asian packaging is metric, so 100 g bars, sachets and bags are the sizes you will meet most often. In the grams to ounces direction, 100 g returns 3.53 oz and 0.22 lb. Keep that as your anchor and the rest follows without a calculator: 250 g is about 8.82 oz, 500 g is about 17.64 oz, and 1 kg is about 35.27 oz. It also settles a recurring shopping question — a 100 g bar and a 4 oz bar are not the same thing. The 4 oz bar is 113.4 g, roughly 13% more chocolate, which matters when a recipe specifies one and your shop stocks the other.
Ounce Conversion Mistakes That Ruin a Recipe
- Reading fluid ounces as weight ounces. A US fluid ounce is 29.574 ml of space; a weight ounce is 28.3495 g of mass. With water the mix-up almost hides itself — 8 fl oz is 236.6 ml and weighs about 237 g, not far off the 226.8 g of 8 weight ounces — but with anything else it falls apart. 8 oz of flour is 226.8 g, which is 1.814 cups, not the single cup that an "8 oz" volume reading implies. If the recipe writes fl oz it means a measuring jug; if it writes oz it means a scale.
- Converting a troy ounce with the kitchen factor. Gold, silver and platinum are quoted in troy ounces of 31.1035 g — 2.754 g more than the 28.3495 g food ounce, about 9.7% heavier. Convert 10 troy ounces of silver as kitchen ounces and you report 283.5 g instead of 311.0 g, 27.5 g light on a quantity that has a market price attached. The rule of thumb: if the thing being weighed has a spot price, it is a troy ounce, and this is not the converter for it.
- Using 28 g per ounce and forgetting it is a rounding. Dropping the decimals costs 1.23% of the weight. At 1 oz that is 0.35 g and nobody will taste it, but at 10 oz it is 3.5 g and at 32 oz it is 11.2 g — nearly two teaspoons of table salt at 6 g per teaspoon, which is exactly the sort of error that shows up in a brine or a bread dough. Keep 28.3495 for anything you weigh in double-digit ounces.
- Treating 16 oz as a pint. 16 oz is 1 lb, which is 453.6 g on a scale. A US pint is 16 fluid ounces, a different quantity of a different kind, and a UK pint is 20 fluid ounces. The rhyme "a pint's a pound the world around" holds only for water and only for US pints; the British version was "a pint of water weighs a pound and a quarter," because the 1824 Weights and Measures Act defined the imperial gallon as the volume of 10 lb of water. Weight labels and volume labels never swap places.
- Expecting a gram figure to solve a cups recipe. Converting 8 oz to 226.8 g tells you nothing about how many cups to scoop, because that answer depends on the ingredient: 226.8 g is 1.814 cups of all-purpose flour but only 1.134 cups of granulated sugar. When the recipe is written in cups you need density, not a weight conversion — that is the job of the Cups to Grams converter and the universal cooking converter.
- Taking a rounded package figure as the recipe amount. US labels round deliberately. On a Nutrition Facts panel, FDA regulation defines a 1 oz serving as 28 g flat (21 CFR 101.9), and a net weight printed as "16 oz" is usually declared as 453 g or 454 g rather than 453.6 g. Those are labelling conventions, not measurements, so when a package and a recipe disagree by a gram or two, weigh what the recipe asks for and let the package round.
- Assuming the conversion changes with the ingredient. It does not. An ounce of flour, an ounce of honey and an ounce of grated parmesan are all 28.3495 g, because both units measure weight. Pages that answer "4 oz of cheddar" with 117 g or "8 oz of chocolate chips" with 160 g have quietly switched to volume and are converting fluid ounces or cups instead. On a scale, 4 oz is 113.4 g and 8 oz is 226.8 g, whatever is in the bowl.
Ounces to Grams — Frequently Asked Questions
How many grams are in an ounce?
One ounce is 28.3495 g — displayed as 28.35 g by this converter, and exactly 28.349523125 g by definition. That is the avoirdupois ounce used for food, packaging and postage, not the troy ounce used for metals.
How many ounces are in 100 grams?
100 g is 3.5274 oz, shown as 3.53 oz, or 0.22 lb. Keep 100 g ≈ 3.5 oz as your mental anchor: 250 g is 8.82 oz and 500 g is 17.64 oz.
Is an ounce 28 grams or 28.35 grams?
Both numbers circulate, for different reasons. The measurement is 28.3495 g; the 28 g you see on US Nutrition Facts panels is a labelling rule, since FDA regulation defines a 1 oz serving as 28 g (21 CFR 101.9). For cooking use 28.3495 — the 28 g shortcut runs 1.23% light, which is 11.2 g on a 32 oz batch.
What is the difference between an ounce and a fluid ounce?
An ounce (oz) is weight: 28.3495 g on a scale. A US fluid ounce (fl oz) is volume: 29.574 ml in a measuring jug. They look interchangeable only with water, where 8 fl oz weighs about 237 g against the 226.8 g of 8 weight ounces. For flour, oil or honey the two readings diverge sharply, and this converter handles the weight ounce only.
Is 8 oz of flour the same as 1 cup?
No. 8 oz of flour is 226.8 g, and at 125 g per US cup that is 1.814 cups — nearly two. The confusion comes from a cup being 8 fluid ounces of volume, which only equals 8 ounces of weight for water. Use the Cups to Grams converter when the recipe is written in cups.
Why does my recipe say 113 g of butter?
Because it began life as 4 oz. A US butter stick is a quarter pound, and 4 × 28.3495 = 113.4 g, which recipes print as 113 g. The same chain explains 227 g (8 oz, two sticks, one cup) and 340 g (12 oz). Whenever a metric quantity looks oddly specific, divide it by 28.3495 — you will usually land on a whole number of ounces.
How many grams are in a troy ounce, and can I use it for food?
A troy ounce is 31.1035 g and applies only to precious metals — about 9.7% heavier than the 28.3495 g food ounce. Do not use it in the kitchen, and do not price gold with a kitchen ounce. This converter works exclusively in avoirdupois (food) ounces; for troy weights use the mass converter, which carries the troy ounce as its own unit.
How many ounces is 500 grams?
500 g is 17.64 oz, or 1.102 lb — just over a pound. A 500 g pack therefore sits between the 16 oz (453.6 g) and 32 oz (907.2 g) sizes US shoppers are used to.
How many grams are in a pound?
One pound is 453.592 g, and a pound holds 16 ounces: 16 × 28.3495 = 453.592 g. Going up a level, 1 kg is 2.204624 lb, so a kilogram is a little over two pounds.
Should I weigh ingredients in grams or ounces?
Grams, if your scale offers both. An ounce is 28.3495 g, so a display in whole grams resolves 28 times finer than one in whole ounces, and scales that show ounces in eighths jump 3.5 g at a time. For a 5 g portion of yeast or salt that difference decides the outcome; for a 1 kg roast it is irrelevant. Recipes in grams also scale by simple multiplication.
Can this converter also turn grams into ounces?
Yes. Press the swap button and the field switches from Ounces to Grams. The current result carries across into the input, so you can convert 8 oz to 226.8 g and immediately send 226.8 g back to confirm it returns 8 oz. Both directions show the same pounds and kilograms cards.
How accurate is this ounces to grams converter?
It multiplies by 28.3495, the exact 28.349523125 g ounce shortened by 0.000023 g. Even at the field's 10,000 oz maximum the difference is about 0.23 g out of 283,495 g — thousands of times finer than any kitchen or postal scale can read. Results display to two decimals, with pounds to three and kilograms to four.
Is this ounces to grams converter free to use?
Yes. It runs in your browser with no account and no sign-up, in both directions, up to 10,000 oz. It sits alongside the universal cooking converter for volume-to-weight questions and the Tablespoons to ml converter for spoon measures.