Fifteen ounces sits at 425.242846875 grams

Fifteen ounces rides the same legal ounce as every US food label: the international pound of exactly 0.45359237 kg divided into 16 parts, as fixed by the 1959 agreement recorded by NIST. One part is 28.349523125 g, so 15 x 28.349523125 = 425.242846875 grams.

In the older units, 15 oz is 0.9375 lb, or fifteen sixteenths of a pound, plus 6,562.5 grains and 240 drams. It sits exactly one ounce, or 28.35 g, below the full pound, which is why a one pound recipe and a 15 oz can differ by a single gentle pour.

Scales round it to 425.2 g at one decimal and 425 g whole. The nearest clean metric packs are 420 g at 14.82 oz and 430 g at 15.17 oz, so nothing sold nominally at 15 oz prints a round metric figure.

The sections below walk 15 oz through canned goods, baking, chocolate and jars, because the same 425.24 g changes meaning with the trade.

A 15 oz can of pumpkin

The 15 oz can is the standard US pumpkin puree size, and it holds 425.24 g of product. USDA data puts one cup of canned pumpkin near 245 g, so a full can holds 425.242846875 / 245 = 1.74 cups. Most pumpkin pie recipes call for 1 cup, or 245 g, so one can covers one pie with about three quarters of a cup left for bread or muffins.

Two cans is the shopping shortcut for two pies: 850.49 g, or 850.5 g rounded. If a recipe prints grams instead of ounces, 425 g is the honest figure for a full can, and no scooping is involved.

Pumpkin puree is dense and wet, which is why volume measuring goes wrong. Weighing the can contents on a scale turns the recipe into pure arithmetic: every 245 g is one cup, every 122.5 g is half.

A 15 oz can of beans

Beans also ship in the 15 oz can, 425.24 g including the liquid. Draining and rinsing sheds the brine, leaving near 255 g of beans, which is about 1.5 cups at the 170 g per cup figure most cookbooks use for drained kidney or black beans.

The drain matters for sodium and for the recipe. Brine can carry roughly a third of the can's weight, so a 425 g can of drained beans is closer to a 9 oz purchase than a 15 oz one. Recipes that print 15 oz usually mean the gross can weight, and printed 1.5 cups usually mean drained.

Cooking from dry makes the comparison simple. One cup of dried beans, near 190 g, cooks up to roughly 2.5 cans' worth of drained beans. A dry 1 lb bag is 453.6 g, just over the 425.24 g of a canned purchase, but it yields far more once soaked.

15 ounces in baking

Bakers meet 15 oz as one can of pumpkin, one bag of most dry goods, or three quarters of a pound of flour. All-purpose flour weighs 125 g per cup, so 425.24 g is 425.242846875 / 125 = 3.40 cups of flour. Granulated sugar at 200 g per cup gives 2.13 cups, and brown sugar packed at 213 g per cup gives 2.00 cups nearly exactly.

Butter makes the fraction neat again. A US pound box holds four sticks of 113.4 g each, so 15 oz is 3.75 sticks. Recipes printed before metric rounds often say three quarters of a pound, which is the same 425.24 g.

Bundt pans and loaf pans think in this range too. A standard 9 by 5 inch loaf recipe runs near 900 g of batter, so one 15 oz measure of flour plus the wet ingredients lands the pan at its typical fill line. Weighing flour instead of scooping removes the 20 percent swing a loose cup can carry.

A 15 oz bag of chocolate or jar of nuts

Chocolate lands near 15 oz in larger retail bags. At the cookbook figure of 170 g per cup of chips, a 15 oz bag holds 425.242846875 / 170 = 2.50 cups, exactly two and a half. That is the bag to buy for a double batch of cookies calling for two cups, with a quarter cup of snacking margin.

Nut jars and bags use the same weight. One cup of whole almonds weighs about 143 g, so 425.24 g is 2.97 cups, three nearly full cups. Chopped nuts run denser at about 113 g per cup, giving 3.76 cups from the same bag.

Cost per gram settles the bag-size question again. A 15 oz bag at 4 dollars costs 0.0094 dollars per gram, while a 32 oz bag at 7 dollars costs 0.0077, a 19 percent cut. The ounce figure is what makes the two bags comparable on the shelf.

15 ounces of chicken or fish

Fifteen ounces of raw chicken breast is 425.24 g. Cooking sheds about a quarter of the weight, so the plate holds near 319 g. A recipe that wants 15 oz of cooked meat needs 425.242846875 / 0.75 = 566.99 g raw, which is exactly 20 oz, one and a quarter pounds to buy.

Protein scales cleanly. Cooked skinless breast carries about 31 g of protein per 100 g, so 319 g lands near 99 g of protein, roughly the daily needs of a 90 kg athlete. Cooked 80 percent lean beef at 26 g per 100 g gives 83 g for the same plate weight.

Calories ride the raw weight as always. Raw 80 percent lean beef runs about 254 calories per 100 g, so 425.2 g raw is near 1,080 calories before cooking. Raw chicken breast at 120 calories per 100 g is near 510 calories for the same raw weight.

Reading 425.24 grams back as ounces

Going the other way, 1 / 28.349523125 = 0.0352739619 oz per gram. That makes 400 g equal 14.1096 oz, 420 g equal 14.8151 oz, 430 g equal 15.1674 oz and 450 g equal 15.8733 oz. A kitchen scale at 0.1 oz resolution reads 15.0 oz anywhere between 423.77 and 426.62 g, a 2.85 g window.

Labels get a small spread. Under 21 CFR 101.105, a 15 oz declaration can sit beside 425 g or 426 g, which convert to 14.9931 oz and 15.0283 oz. When the two printed numbers disagree, the metric one is usually what the filler weighed.

Two shortcuts surround this number, and one is dangerous. Using 28.35 g per ounce drifts 0.007 g across 15 oz, invisible on any scale. Using 28 g per ounce shortchanges 15 oz by 5.243 g, a 1.2 percent miss that can flip a shipping weight band. The NIST SP 811 guide lists 28.349523125 g, and that is the constant for a spreadsheet.