Convert ounce to gram

1 ounce = 28.34952 grams. Enter any value below for an exact conversion.

Value in ounces

1 oz =

28.34952 g

grams

Need the reverse? Convert gram to ounce →

Formula

1 ounce = 28.34952 grams
gram = ounces × 28.34952
ounce = grams × 0.03527396

ounce to gram conversion table

1 oz28.34952 g

2 oz56.69905 g

3 oz85.04857 g

5 oz141.7476 g

10 oz283.4952 g

20 oz566.9905 g

25 oz708.7381 g

50 oz1417.476 g

100 oz2834.952 g

1000 oz28349.52 g

About converting ounces to grams

Ounces to grams is a kitchen and postage staple, since many recipes and shipping scales mix the two systems. One ounce is about 28.35 grams. (This is the avoirdupois ounce used for weight, not the fluid ounce used for volume.)

Method & sources

Conversions use exact legal definitions rather than rounded approximations: 1 inch = 2.54 cm and 1 pound = 0.45359237 kg (fixed by the 1959 international yard and pound agreement), 1 mile = 1.609344 km, and 1 US liquid gallon = 3.785411784 litres. Temperatures convert with °F = °C × 9⁄5 + 32 and K = °C + 273.15. Results are rounded only for display.

Page last updated: October 1, 2026

Frequently asked questions

How many grams are in a ounce?

One ounce equals 28.34952 grams. So 10 ounces is 283.4952 grams. Use the converter above for any value.

What is the formula to convert ounces to grams?

1 ounce = 28.34952 grams gram = ounces × 28.34952 ounce = grams × 0.03527396

Is the ounce-to-gram conversion exact?

Yes. The conversion factor between ounces and grams is defined exactly, so results are precise — only rounded for display.

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