Ounces to Grams Converter (oz to g)
Type any amount — even fractions like 1/4 or 1/8 oz — and get the exact gram weight instantly. Works in reverse too: grams to ounces, with avoirdupois and troy ounce modes.
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Ounces to Grams Conversion Table
Tap any ounce value to load it into the converter above. All values use the exact factor 1 oz = 28.349523125 g.
| Ounces (oz) | Grams (g) | Kilograms + Grams |
|---|---|---|
| 1/8 oz | 3.544 g | 0 kg 3.544 g |
| 1/4 oz | 7.087 g | 0 kg 7.087 g |
| 1/3 oz | 9.45 g | 0 kg 9.45 g |
| 1/2 oz | 14.175 g | 0 kg 14.175 g |
| 2/3 oz | 18.9 g | 0 kg 18.9 g |
| 3/4 oz | 21.262 g | 0 kg 21.262 g |
| 1 oz | 28.35 g | 0 kg 28.35 g |
| 2 oz | 56.699 g | 0 kg 56.699 g |
| 2.5 oz | 70.874 g | 0 kg 70.874 g |
| 3 oz | 85.049 g | 0 kg 85.049 g |
| 4 oz | 113.4 g | 0 kg 113.4 g |
| 5 oz | 141.75 g | 0 kg 141.75 g |
| 6 oz | 170.1 g | 0 kg 170.1 g |
| 8 oz | 226.8 g | 0 kg 226.8 g |
| 10 oz | 283.5 g | 0 kg 283.5 g |
| 12 oz | 340.19 g | 0 kg 340.19 g |
| 16 oz | 453.59 g | 0 kg 453.59 g |
| 20 oz | 566.99 g | 0 kg 566.99 g |
| 32 oz | 907.18 g | 0 kg 907.18 g |
| 50 oz | 1417.48 g | 1 kg 417.48 g |
| 100 oz | 2834.95 g | 2 kg 834.95 g |
Grams to Ounces Conversion Table
Common reverse conversions: grams back to ounces (1 g = 0.03527396 oz).
| Grams (g) | Ounces (oz) | Pounds (lb) |
|---|---|---|
| 1 g | 0.0353 oz | 0.0022 lb |
| 5 g | 0.1764 oz | 0.011 lb |
| 10 g | 0.3527 oz | 0.022 lb |
| 25 g | 0.8818 oz | 0.0551 lb |
| 50 g | 1.7637 oz | 0.1102 lb |
| 100 g | 3.5274 oz | 0.2205 lb |
| 250 g | 8.8185 oz | 0.5512 lb |
| 500 g | 17.637 oz | 1.1023 lb |
| 1000 g | 35.274 oz | 2.2046 lb |
Convert Ounces to Other Weight and Mass Units
Grams are the most common target, but ounces convert cleanly into every metric and imperial unit. Quick reference (avoirdupois ounce):
| Ounces (oz) | Kilograms (kg) | Pounds (lb) | Milligrams (mg) |
|---|---|---|---|
| 1 oz | 0.0283 kg | 0.0625 lb | 28,349.52 mg |
| 2 oz | 0.0567 kg | 0.125 lb | 56,699.05 mg |
| 4 oz | 0.1134 kg | 0.25 lb | 113,398.09 mg |
| 8 oz | 0.2268 kg | 0.5 lb | 226,796.18 mg |
| 16 oz | 0.4536 kg | 1 lb | 453,592.37 mg |
| 32 oz | 0.9072 kg | 2 lb | 907,184.74 mg |
| 100 oz | 2.835 kg | 6.25 lb | 2,834,952.31 mg |
Handy factors to remember: 1 oz = 0.0625 lb (exactly one-sixteenth of a pound), 1 oz = 0.0283495 kg, and 1 oz = 28,349.52 mg.
How to Use This Ounces to Grams Converter
- Pick your direction. Convert ounces to grams, or flip the tabs to convert grams to ounces instead.
- Choose the ounce type. Leave it on avoirdupois for food, postage and everyday items; switch to troy for gold, silver and other precious metals.
- Type any amount. Whole numbers, decimals and fractions all work: 2, 2.5, 1/4, 1/8 or 1 1/2.
- Read the result instantly. The gram weight appears immediately, with kilograms, pounds and milligrams alongside — no button needed. Copy it with one tap.
Why Use This Oz to Gram Converter?
- Exact, not approximate. It multiplies by the full 28.349523125-gram factor, so results match laboratory-grade references — unlike rough "28.3" shortcuts.
- Handles kitchen fractions. Recipes call for 1/4 oz or 1/8 oz of yeast, gelatin or spices; type them exactly as written instead of doing decimal math.
- Covers both ounce types. Avoirdupois for everyday use and troy ounce (31.1034768 g) for precious metals — one tool, both standards.
- Converts both directions. Ounces to grams for cooking and shipping; grams to ounces when a nutrition label or scale speaks metric.
- Zero friction. No sign-up, no ads-in-the-way, no page reloads. It works offline once loaded and never sends your numbers anywhere.
- Built for the kitchen. Instant equivalents in kg, lb and mg, plus a quick-reference conversion table for the values you look up most.
Who Is This Ounce to Gram Tool For?
Ounces to Grams: The Complete Guide
How many grams are in an ounce?
One ounce equals exactly 28.349523125 grams — usually rounded to 28.35 g. That ounce is the avoirdupois ounce, the standard ounce used across the United States for food packaging, portion sizes and postal weights. Its exact value was fixed in 1959 by international agreement between the US and Commonwealth countries, so every modern scale and reference uses the same number.
Two lookalikes cause most confusion. A fluid ounce measures volume, not weight — 1 fl oz of water happens to weigh about 1 oz, but 1 fl oz of honey weighs much more. And the troy ounce (31.1034768 g) is a heavier ounce reserved for precious metals. In the UK, "6 oz in grams UK" gives the same answer as in the US — 170.10 g — because the imperial ounce and the US ounce are the identical avoirdupois ounce.
Notation varies but the meaning does not: oz to g, oz to gram, oz to gr and 1oz to g all describe the same ounce-to-gram conversion.
The ounces-to-grams formula
The conversion is a single multiplication:
m(g) = m(oz) × 28.349523125
Worked example: convert 15 oz to grams. 15 × 28.349523125 = 425.24 g. That is the whole method — no offsets, no special cases. If you only need a mental estimate, round to 28.35 g per ounce, or use the baker's shortcut: 1 oz ≈ 30 g minus about 5%.
One caution: round only at the end. Chaining rounded values (say, using 28.3 repeatedly while scaling a recipe) lets small errors compound. The converter above keeps full precision internally and rounds only for display.
Grams to ounces: converting in reverse
Sometimes the scale gives you grams and the recipe speaks ounces. The reverse formula simply inverts:
m(oz) = m(g) ÷ 28.349523125
Equivalently, 1 gram = 0.03527396 oz. So 100 g becomes 3.5274 oz, and a 250 g block of butter is 8.82 oz. Switch to the "Grams → Ounces" tab above and the same precision works in reverse — useful when a nutrition label lists 12 g of protein and your portion was measured in ounces.
Ounces and grams in cooking and baking
American recipes lean on ounces: a stick of butter is 4 oz (113.40 g), a block of cream cheese is 8 oz (226.80 g) — exactly half a pound — and chocolate is often sold in ounce bars. Yet serious bakers weigh in grams, because an ounce is a coarse step: 1 oz spans 28.35 g, while a gram lets you adjust precisely. A cake formula that needs 0.25 oz of salt (7.09 g) is far easier to reproduce at 7 g on a gram scale.
Small fractions appear constantly in baking: 1/4 oz to grams is 7.09 g and 1/8 oz to grams is 3.54 g — typical amounts for yeast, gelatin or baking powder. Weighing these in grams removes the wobble of tiny fraction marks on measuring spoons. Pair this converter with a cups to grams converter when a recipe mixes volume and weight, and a recipe converter when you need to scale the whole batch.
Cooking fractions: oz to grams
Recipes rarely say "0.37 oz" — they say 1/4 oz of yeast or 1/2 oz of gelatin. Type these fractions into the converter exactly as written; here are the ones you will meet most:
| Fraction | Ounces | Grams |
|---|---|---|
| 1/8 oz | 0.125 oz | 3.54 g |
| 1/4 oz | 0.25 oz | 7.09 g |
| 1/3 oz | 0.333 oz | 9.45 g |
| 1/2 oz | 0.5 oz | 14.17 g |
| 2/3 oz | 0.667 oz | 18.90 g |
| 3/4 oz | 0.75 oz | 21.26 g |
Memorize two anchors and you will rarely need the chart: 1/4 oz = 7.09 g and 1/2 oz = 14.17 g.
Why bakers prefer grams
An ounce is a coarse step — 28.35 grams wide — while a gram is the smallest adjustment a recipe can meaningfully make. That resolution is why professional bakers weigh flour, salt and yeast in grams: the gap between 7 g and 9 g of salt (barely 1/16 oz) decides whether bread tastes seasoned or flat. Grams also make baker's percentages possible — expressing every ingredient as a share of flour weight only works with a fine, decimal-friendly unit. Ounces simply cannot play that game.
Why ounces and grams both matter
Ounces rule American packaging, recipes and portion labels; grams rule the rest of the world, nutrition science and every digital kitchen scale. Neither system is going away, so fluency in both is the practical skill. A cook who reads "8 oz cream cheese" and instantly thinks "226.80 g" never stalls mid-recipe and never mis-scales a dish. That is exactly the gap this converter fills — one number in, the other system out, in a keystroke.
What is a troy ounce?
The troy ounce equals 31.1034768 grams — about 10% heavier than the avoirdupois ounce. It descends from the medieval trading system of Troyes, France, and survives today as the standard unit for gold, silver, platinum and palladium pricing. A further quirk: 12 troy ounces make a troy pound, unlike the 16 avoirdupois ounces in a regular pound.
If you buy or sell precious metals, never convert with the 28.35 factor — use the troy mode in the converter above, which multiplies by 31.1034768 instead.
Common conversions worth memorizing
These are the ounce-to-gram values people search for most, all rounded the way a kitchen scale shows them:
- 1 ounce to grams: 28.35 g
- 1/4 oz to grams: 7.09 g
- 1/8 oz to grams: 3.54 g
- 2.5 oz to grams: 70.87 g
- 6 ounces to g: 170.10 g
- 8 oz to grams: 226.80 g (exactly half a pound)
- 12 oz in grams: 340.19 g (three-quarters of a pound)
- 16 oz to grams: 453.59 g (one full pound)
Notice the pattern: every 8 oz adds 226.80 g. Once you know 8 oz = 226.80 g, you can estimate 16, 24 or 32 oz quickly by doubling or tripling.
Tips for accurate weight conversion
- Confirm which ounce you have. Food, postage and body weight use avoirdupois; gold and silver use troy; liquids use fluid ounces (a volume).
- Keep full precision until the end. Convert with 28.349523125, then round to what your scale can actually display.
- Weigh instead of converting twice. If your scale has a gram mode, weigh directly in grams — every conversion is a chance to mistype.
- UK and US ounces are identical. Avoirdupois is avoirdupois; "6 oz in grams UK" needs no separate lookup.
- For medicine, jewelry or lab work, use the exact factor and the troy selector — rounding shortcuts are a kitchen convenience, not a professional standard.
Don't know the ounce value? Estimate it
No scale and no package weight? Compare against objects with known weights: a US butter stick is exactly 4 oz (113.40 g), a standard cream-cheese block is 8 oz (226.80 g), and a soda can holds 12 oz of liquid. Hold the mystery item in one hand and the reference in the other — with a little practice, most people land within an ounce or two. Treat this as a rough guess for everyday cooking only, never for baking, medicine or selling by weight: when precision matters, a basic kitchen scale beats every estimation trick ever invented.
Ounces to Grams — Frequently Asked Questions
How many grams are in an ounce?
One avoirdupois ounce — the ounce used in cooking, postage and everyday weighing — equals exactly 28.349523125 grams. For everyday use, 28.35 grams per ounce is accurate enough for any kitchen scale.
What is 1 ounce to grams?
1 ounce to grams is 28.35 g (exactly 28.349523125 g). Whether you write it as 1 oz to g, 1oz to g or 1 oz to gr, it means the same thing: multiply the ounce value by 28.349523125 to get grams.
How many grams is 6 oz in the UK?
6 oz in grams is 170.10 g in the UK — exactly the same as in the US. The imperial ounce used in Britain is identical to the US avoirdupois ounce (28.349523125 g), so UK and US ounce-to-gram conversions always match.
What is 4 oz in grams?
4 oz in grams is 113.40 g. This is a handy value to memorize: a standard US stick of butter weighs 4 oz, which is about 113 g.
What is the formula to convert ounces to grams?
The formula is: grams = ounces × 28.349523125. To convert ounces to grams, multiply your ounce amount by 28.349523125. To convert the other way, divide grams by 28.349523125 — or multiply grams by 0.03527396 to get ounces.
How many grams are in a troy ounce?
A troy ounce equals 31.1034768 grams — about 10% heavier than the avoirdupois ounce. The troy ounce is used for weighing precious metals such as gold, silver and platinum. Select “Troy” in the converter above to use it.
How do I convert grams back to ounces?
Divide the gram value by 28.349523125. For example, 100 g ÷ 28.349523125 = 3.53 oz. The tool above converts grams to ounces instantly — just switch to the “Grams → Ounces” tab.
Can I weigh something in ounces without a scale?
You can estimate: 1 oz is roughly two tablespoons of a dense ingredient, and a standard stick of butter is exactly 4 oz (113.40 g). But for baking, nutrition or anything precise, a kitchen scale is far more reliable than any estimate.
Still converting? Try the cups to grams converter for volume-based recipes, or the recipe nutrient estimator to turn those gram weights into nutrition facts.