Grams to Ounces Converter

What This Tool Does

This converter translates grams (g) to ounces (oz) and ounces back to grams, bidirectionally and in real time. Enter any value in either field and the result appears immediately. The conversion is based on the avoirdupois ounce, which is the standard unit of weight used in the United States for everyday purposes — food, postal, and general commerce.

How Does It Work?

The exact relationship between grams and the avoirdupois ounce is:

1 ounce (avoirdupois) = 28.349523125 grams  (exact, by definition)

So the formulas are:

ounces = grams ÷ 28.3495
grams  = ounces × 28.3495

For a quick mental approximation: multiply grams by 0.035 to get ounces, or multiply ounces by 28.35 to get grams.

Note on Troy Ounces

If you’re working with precious metals (gold, silver, platinum), be aware that the troy ounce is different:

1 troy ounce = 31.1035 grams

Precious metals prices on exchanges like COMEX are quoted per troy ounce. This tool uses the standard avoirdupois ounce for general-purpose weight conversion.

How Do You Convert Grams to Ounces?

Grams	Ounces
1 g	0.0353 oz
5 g	0.1764 oz
10 g	0.3527 oz
28.35 g	1.000 oz
50 g	1.764 oz
100 g	3.527 oz
200 g	7.055 oz
250 g	8.818 oz
454 g	16.01 oz (~1 lb)
500 g	17.637 oz
1,000 g	35.274 oz

How Do You Convert Ounces to Grams?

Ounces	Grams
0.5 oz	14.175 g
1 oz	28.350 g
2 oz	56.699 g
4 oz	113.398 g
8 oz	226.796 g
12 oz	340.194 g
16 oz (1 lb)	453.592 g
32 oz (2 lb)	907.185 g

What Are Common Use Cases?

Cooking and baking with European recipes. Many recipes from the UK, France, Germany, and elsewhere list ingredients in grams. US cooks who prefer ounces (or cup-based volumes tied to ounce weights) need a quick conversion. For example, a recipe calling for 250 g of flour equals about 8.8 oz.

Reading US nutrition labels. The FDA requires nutrition facts panels on packaged food to display serving sizes in both metric (g, mL) and US customary (oz, cups) units. If you want to cross-check or scale a serving, this tool does it instantly.

Weighing coffee and tea. Specialty coffee culture in the US has embraced gram-based precision for brewing ratios. A standard pour-over recipe might call for 30 g of coffee — that’s about 1.06 oz for those who prefer the familiar unit.

Precious metals and jewelry. While the troy ounce governs spot prices, retail jewelry is often listed by weight in grams. A 14 karat gold ring weighing 5 g contains a known amount of pure gold — converting to troy ounces requires knowing 1 troy oz = 31.1035 g.

Shipping and postage. USPS rates for First-Class Mail in the US are calculated per ounce. If you weigh an item in grams on a kitchen scale, this converter gives you the ounce value you need.

Frequently Asked Questions

How many grams are in an ounce?

1 avoirdupois ounce equals exactly 28.349523125 grams. In practice, 28.35 g is a highly accurate approximation for virtually all everyday purposes.

What is 100 grams in ounces?

100 ÷ 28.3495 = 3.5274 oz. This is a common conversion for food portions: a 100 g serving of chicken breast is about 3.5 oz — close to a quarter-pound portion.

Is there a difference between a regular ounce and a troy ounce?

Yes, and it matters if you’re dealing with precious metals. The avoirdupois ounce (used for food, body weight, mail) equals 28.3495 g. The troy ounce (used for gold, silver, platinum, gemstones) equals 31.1035 g — about 10% heavier. Gold prices quoted on financial markets are per troy ounce. This tool converts avoirdupois ounces.

How do I convert grams to ounces without a calculator?

Divide by 28.35. For a rough mental estimate, multiply by 0.035 — this gets you within about 0.1% of the correct answer. For example, 300 g × 0.035 = 10.5 oz (exact: 10.582 oz). Good enough for a recipe.

What is 16 ounces in grams?

16 oz = 453.592 g. This matters because 16 oz = 1 US pound. So 1 pound of anything weighs about 453.6 g, which is why a standard US can of beans (1 lb) is often labeled 454 g.