About the Grams to Ounces
This grams to ounces converter turns a weight in grams into standard (avoirdupois) ounces — the ounce used for food, postage and body weight in the US and UK. It also shows the weight in pounds, in pounds-and-ounces, and in troy ounces, the unit used to price gold and silver.
Use it to follow a metric recipe with a US kitchen scale, compare package sizes at the store, check shipping weights, or understand the weight of jewellery and coins. The chart covers common amounts from 1 g to 1 kg.
The avoirdupois ounce is exactly 28.349523125 g (1/16 of the 453.59237 g international pound). Note that fluid ounces measure volume, not weight — for liquids, use a volume converter instead.
With the default inputs, the ounces is 3.5274 oz. Change any value above to recalculate instantly.
How to use the grams to ounces
- 1Enter the weight in grams.
- 2Read the result in ounces.
- 3Check pounds or pounds-and-ounces for heavier items.
- 4Use troy ounces only for gold, silver and other precious metals.
Formula and method
The international avoirdupois pound is defined as exactly 453.59237 grams, and there are 16 ounces in a pound, so one ounce is exactly 28.349523125 grams. Divide grams by that figure to get ounces, or by 453.59237 to get pounds.
Troy ounces, used for precious metals, are heavier at 31.1034768 g each. Pounds-and-ounces splits the total ounces into whole pounds (16 oz each) and the ounces left over, rounded to 0.1 oz.
- g
- Weight in grams
- oz
- Avoirdupois ounces
- lb
- Pounds (16 oz)
Worked examples
100 g of chocolate
100 ÷ 28.3495 = 3.53 oz. A 100 g bar is roughly the size of a 3.5 oz US chocolate bar.
One kilogram of flour
1,000 ÷ 28.3495 = 35.27 oz. That is 2 whole pounds (32 oz) plus 3.3 oz, or 2.205 lb.
454 g package (about a pound)
454 ÷ 28.3495 = 16.01 oz, so a 454 g pack is labelled as 1 lb in the US.
Frequently asked questions
How many grams are in an ounce?+
One avoirdupois ounce is exactly 28.349523125 grams, usually rounded to 28.35 g. A troy ounce, used for gold, is 31.10 g.
How do I convert grams to ounces?+
Divide the grams by 28.35. For example, 250 g ÷ 28.35 = 8.82 oz. For a quick estimate, divide by 30 and add about 6% (250 ÷ 30 = 8.33, plus 6% ≈ 8.8 oz).
How many ounces is 100 grams?+
100 grams is 3.53 ounces (100 ÷ 28.35). It is also 0.22 pounds, or about the weight of a small chocolate bar.
Are ounces and fluid ounces the same?+
No. An ounce (oz) measures weight, while a fluid ounce (fl oz) measures volume. They only line up roughly for water; flour, sugar or oil weigh different amounts per fluid ounce.
What is the difference between an ounce and a troy ounce?+
A troy ounce (31.1035 g) is about 10% heavier than a standard ounce (28.3495 g). Gold, silver and platinum prices are quoted per troy ounce.