Grams to Ounces Converter

How to convert grams to ounces

The everyday ounce is the avoirdupois ounce, defined as one sixteenth of the international pound. The pound is exactly 453.59237 g, so one ounce is exactly 28.349523125 g. Dividing grams by that number gives ounces. Because a gram is so small, the answers are small too: a 100 g chocolate bar is only about 3.5 oz. Pounds, kilograms, stone and every other mass unit are on the weight converter.

Two traps catch people. First, gold, silver and platinum are sold by the troy ounce of 31.1034768 g, about 10% heavier, so bullion needs a different factor: choose Troy oz on the Ounce switch above, or see the table below. Second, a fluid ounce measures volume, not weight. A US fluid ounce of water weighs about 29.57 g, but a fluid ounce of flour weighs far less. For recipes measured in cups, use the cups to grams converter or the cups to fluid ounces converter instead.

Step by step

1. Take the weight in grams.
2. Divide it by 28.349523125 (or multiply by 0.035274).
3. Above 16 oz, divide the ounces by 16 to get pounds and ounces.
4. Round to one decimal for cooking, two for postage.

See it on a scale

How do you convert grams to ounces in your head?

Divide the grams by 28 for a quick answer that reads about 1.2% high, or remember one anchor, 100 g ≈ 3.5 oz (exactly 3.5274 oz), and scale from it: 200 g ≈ 7 oz, 50 g ≈ 1.75 oz, 250 g ≈ 8.8 oz.

How rough shortcuts compare

• Divide by 30: easy, but about 5.5% low. 300 g comes out at 10 oz instead of 10.58 oz.
• Divide by 28: about 1.2% high, good enough for most cooking.
• Multiply by 0.035: about 0.8% low, the closest of the three.

For small amounts such as coffee, yeast or spices, work in grams if you can. A kitchen scale that shows ounces usually steps in 0.1 oz, which is 2.8 g, while grams step in 1 g, so grams are nearly three times more precise. Spoon measures for tiny amounts are covered by the tablespoons to teaspoons converter.

Why do labels, letters and scales show both grams and ounces?

Because US law and US postal rates work in ounces while almost everything else works in grams. The Fair Packaging and Labeling Act requires consumer packages in the US to state their net quantity in both metric and US customary units, so a one-pound package reads 16 oz and 454 g, the pound rounded to the nearest gram.

Postage. US postal rates for letters step up by the ounce, and a First-Class Mail letter can weigh at most 3.5 oz, which is 99.2 g. A letter weighing 28 g is just under 1 oz, while 29 g tips it over and may need extra postage, so weigh close cases carefully.

Scales. Most digital kitchen and postal scales switch between g and oz at the press of a button, and both use the same 28.349523125 g ounce. Jewelry scales may also offer troy ounces (ozt) or pennyweights, so check the unit label before reading a price.

What is a gram?

The gram is one thousandth of the kilogram, the SI base unit of mass. It was originally meant to be the mass of one cubic centimeter of water, which is why 1 mL of water still weighs very nearly 1 g. For body weight and other large amounts, the pounds to kg converter is the better tool.