Grams to Ounces Converter

What this converter does

It converts grams — the unit on every food label, kitchen scale and recipe outside the United States — into avoirdupois ounces, the weight unit US recipes and packaging still speak. It is a cook’s conversion above all: 100 g of butter into ounces for an American cookbook, a 250 g block of chocolate against a recipe wanting 8 oz. The factor is exact, so the only judgement needed is how finely to round, and for cooking the answer is: not very.

The formula

Divide grams by 28.349523125 to get ounces. The number looks unwieldy but is exact by definition: the avoirdupois ounce is one sixteenth of the pound, the pound is exactly 453.59237 g, and 453.59237 ÷ 16 = 28.349523125 with nothing left over. Every digit is legal fact, not measurement. The reverse multiplies by the same constant, and the two directions round-trip perfectly in this tool because the arithmetic is done in exact decimal form.

The kitchen shorthand “28 grams to the ounce” runs 1.2% light. That is invisible in a biscuit and visible in bread: sixteen shorthand ounces make 448 g, a full 5.6 g short of the true pound, which is roughly a teaspoon of flour missing from every loaf. Use the shorthand at the stove; use the exact factor anywhere numbers accumulate.

Worked examples

100 g → 3.53 oz. A European chocolate bar of 250 g → 8.82 oz, which is why it never quite matches an American recipe’s half-pound (8 oz = 226.8 g). A 500 g bag of pasta → 17.64 oz, just over the pound. The 397 g tin of condensed milk → 14.00 oz, because that tin size was engineered as 14 oz in the first place — one of many packaging weights that make sudden sense in the other unit.

Weight ounces, fluid ounces, and the cup problem

The ounce this page converts is a weight. US recipes also use fluid ounces — a volume, about 29.6 ml — and cups, another volume. “8 oz of cream” in a US recipe almost always means fluid ounces; “8 oz of cream cheese” means weight. The giveaway is the ingredient’s state: liquids go by volume in American kitchens, solids by weight or by cup. No converter can turn grams into cups without knowing the ingredient’s density — a cup of flour is about 120 g, a cup of sugar about 200 g — so this page deliberately stays on the weight side of that line and says so rather than guessing.

Not the gold ounce

Bullion, silver spot prices and assay results use the troy ounce of exactly 31.1034768 g — 9.7% heavier than the kitchen ounce. The two share a name and nothing else. Convert metal with the grams to troy ounces tool linked below; convert food here. Reading a gold price with the kitchen ounce misprices the metal by that full 10%, which on a kilogram of gold is a serious sum of money.

Rounding for real kitchens

A typical home scale resolves 1 g and is honest to within a few grams; converted, that is 0.04–0.1 oz of inherent fuzz. So the two-decimal display already exceeds what the hardware knows, and recipe tolerance is looser still — baking, the fussiest kitchen discipline, works comfortably at ±5%. The practical rule: convert exactly, then round to the nearest quarter ounce and cook. The exception is coffee, where enthusiasts weigh doses to 0.1 g; they should stay in grams entirely, which is why every serious coffee recipe already does.

Common mistakes

Dividing by 28 instead of 28.3495 — the shorthand error above, compounding with quantity. Converting a fluid-ounce figure as if it were weight — 8 fl oz of water happens to weigh about 8.3 oz, close enough to hide the category error until a denser liquid (honey, cream) breaks it. And trusting a chart that was itself built on the 28 g shorthand: if a chart says 450 g to the pound, everything downstream of it is 0.8% off. When two sources disagree, the one carrying 28.3495 is the one that did the arithmetic properly.

Benchmarks

25 g = 0.88 oz. 28.35 g = 1 oz exactly. 50 g = 1.76 oz. 100 g = 3.53 oz. 113 g = 4 oz (the quarter-pound). 150 g = 5.29 oz. 200 g = 7.05 oz. 227 g = 8 oz (the half-pound). 250 g = 8.82 oz. 340 g = 12 oz (the standard jam jar). 397 g = 14 oz (the condensed-milk tin). 454 g = 16 oz = 1 lb.

Accuracy and limits

The factor is exact, the arithmetic is exact, and the display rounds once where you choose. The limits are the ones stated: weight only, avoirdupois only, and no density guesses — cups and millilitres are volume questions this page refuses on principle, because a wrong guess dressed as a conversion is worse than a clear boundary.

Why weight beats volume at the scale

The deeper reason this conversion matters to cooks: weight is the only measure that transfers between kitchens. A cup of flour spans 110 to 150 g depending on how it was scooped, settled and sifted — a 30% spread on the recipe’s most structural ingredient — while 120 g of flour is 120 g in every kitchen on Earth. Professional recipes are written by weight for exactly this reason, and the grams-to-ounces bridge exists mostly to let weight-based recipes cross into ounce-speaking kitchens without passing through cups at all. If a US recipe offers both cups and ounces, take the ounces and convert here; the cups were the approximation.

Old British recipes and their ounces

Pre-metric British cookbooks — anything before roughly the 1980s — measure solids in ounces and pounds too, so this page serves them as well: grandmother’s 6 oz of sugar is 170 g on a modern UK scale. These books use the same avoirdupois ounce as American ones, so no correction is needed between them; the difference between old British and American baking lies in the volume measures (the pints disagree), which weight conversion neatly sidesteps.

Scaling a converted recipe up or down

Conversion and scaling interact badly if done in the wrong order. Scale first in grams, then convert once: doubling 175 g to 350 g and converting gives 12.35 oz cleanly, while doubling a rounded 6.17 oz gives 12.34 and a table that no longer quite matches the metric column. The rule generalises — do all arithmetic in the measured unit, convert as the final step, and round only what you will actually weigh. It is the same round-once principle this converter applies internally, extended to the whole recipe card.