Convert ounces to grams instantly with a live calculator, a kitchen reference chart, and the manual math.
Most of the world's recipe and food scales read grams, while US packaging and recipes use ounces. A European following an American recipe converts every ingredient; a traveler weighing luggage compares a US scale in ounces with an airline limit in kilograms, going through grams on the way. Coffee, chocolate, and protein powder are all sold in ounces in the US but in grams almost everywhere else.
Mailing and shipping are a surprisingly common trigger. US postage rates and scales use ounces, while international customs forms and freight quotes use grams and kilograms. Because 1 ounce equals 28.3495 grams exactly, the conversion is simple multiplication, and this page also shows the pounds relation, since 16 oz make a pound.
Convert 4 ounces to grams:
| Ounces | Grams | Ounces | Grams | Ounces | Grams |
|---|---|---|---|---|---|
| 0.5 oz | 14.17 g | 4 oz | 113.40 g | 12 oz | 340.19 g |
| 1 oz | 28.35 g | 5 oz | 141.75 g | 14 oz | 396.89 g |
| 1.5 oz | 42.52 g | 6 oz | 170.10 g | 16 oz (1 lb) | 453.59 g |
| 2 oz | 56.70 g | 7 oz | 198.45 g | 20 oz | 566.99 g |
| 2.5 oz | 70.87 g | 8 oz | 226.80 g | 24 oz | 680.39 g |
| 3 oz | 85.05 g | 9 oz | 255.15 g | 32 oz (2 lb) | 907.18 g |
| 3.5 oz | 99.22 g | 10 oz | 283.50 g | 48 oz (3 lb) | 1,360.78 g |
1 ounce = 28.349523125 grams exactly (avoirdupois ounce).
8 × 28.3495 = 226.8 g. This is half a pound, and also the volume of one US cup of water in weight.
Multiply by 28.35 for close results, or use the exact 28.3495 when precision matters, such as for mail or recipes.
Weight ounces (oz) measure mass; fluid ounces (fl oz) measure volume. One fl oz of water weighs about 1.04 oz, but for other liquids the ratio differs.