Grams to Ounces

Divide by 28.35. Troy ounces for metals are a different divisor.

Amount

Unit

Tip: you can type “8 oz flour” or “500 ml to oz”.

100 grams =

3.53oz

Details

Measures about 100 mL ·Ingredient

All units

oz: 3.53
lb: 0.22
kg: 0.1
oz t: 3.22

How we got this

100 grams × 1 g/g = 100 g

100 g ÷ 28.349523125 g/oz = 3.53 oz

1 oz = 28.349523125 g. 1 lb = 453.59237 g. 1 troy oz = 31.1034768 g (international avoirdupois and troy definitions, NIST).

Density used: water, 1 g/mL. By definition close to 1 g/mL at room temperature. Source: NIST.

Divide grams by 28.3495 to get ounces. 100 g is 3.53 oz, 250 g is 8.82 oz, 500 g is 17.64 oz and 1 kg is 35.27 oz. For a quick estimate divide by 28. You will read a little over 1% high, which is fine for a snack and not for a scale-sensitive recipe.

That is the regular weight ounce. Gold, silver and platinum are weighed in troy ounces of 31.1035 g, so 100 g of gold is 3.22 troy oz, not 3.53. Grams are a weight, so they do not become fluid ounces without a density. 100 g of water is 100 mL, which is 3.38 US fl oz.

Quick answers

100 g: 3.53 oz
100 g: 3.22 oz t

Formula

oz = g ÷ 28.349523125
g = oz × 28.349523125
oz t = g ÷ 31.1034768
g = oz t × 31.1034768

Conversion table

grams to oz conversion table
Amount	g to oz	g to oz t
1	0.04	0.03
5	0.18	0.16
10	0.35	0.32
25	0.88	0.8
28	0.99	0.9
50	1.76	1.61
100	3.53	3.22
150	5.29	4.82
200	7.05	6.43
250	8.82	8.04
300	10.58	9.65
454	16.01	14.6
500	17.64	16.08
750	26.46	24.11
1000	35.27	32.15

Which ounce?

Ounce	Exactly	Used for
Ounce (oz)	28.349523125 g	Food, mail, kitchen scales, the default meaning of a bare “oz”.
US fluid ounce (US fl oz)	29.5735295625 mL	US labels, bottles, cans. 16 of them make a US pint.
UK fluid ounce (UK fl oz)	28.4130625 mL	UK recipes, older imperial labels. 20 of them make a UK pint.
Troy ounce (oz t)	31.1034768 g	Gold, silver, platinum. About 10% heavier than the ounce on your kitchen scale.

Common amounts

8 oz cup 237 mL
12 oz can 355 mL
16.9 oz bottle 500 mL
20 oz bottle 591 mL
3.4 oz TSA 100 mL
1.7 oz perfume 50 mL
8 oz steak 227 g
1 oz gold 31.1 g

Questions

How many grams are in an ounce?

28.35 g. The exact value is 28.349523125 g.

How many oz is 100 g?

3.53 oz. That is also 3.22 troy oz if you are weighing gold.

How many oz is 250 g?

8.82 oz, a little over half a pound. 500 g is 17.64 oz, or 1.10 lb.

How many oz is 1 kg?

35.27 oz, or 2.20 lb.

Why do some recipes use 28 g or 30 g per ounce?

They round for convenience. 28 g is about 1.2% under a true ounce and 30 g is 5.8% over, so the error grows as the amount does.