ConverterWeight Ounces to Grams Converter
Convert an ingredient mass stated in avoirdupois ounces into grams for a kitchen scale, package comparison, or metric recipe. Check that the source says weight ounces rather than fluid ounces.
Enter decimals, fractions, mixed fractions, or scientific notation. Commas and negative quantities are rejected. Results display up to four decimals.
Use The Weight-Ounce Factor
The formula is grams = weight ounces x 28.349523125. One ounce displays as 28.3495 g, 8 ounces as 226.7962 g, and 1/8 ounce as 3.5437 g.
The calculation happens before the result is rounded for display. Keep the source package value if a regulated label or recipe uses its own stated serving convention.
Do Not Substitute Fluid Ounces
A fluid ounce measures volume. Its mass in grams depends on the substance, so a fluid-ounce amount cannot be passed through this weight formula without additional density information. Troy ounces also use a different mass definition.
Measurement Reference
The kitchen measurements guide explains weight, volume, and regional labels before you choose a converter.
Frequently Asked Questions
It uses the avoirdupois weight ounce. It does not convert fluid ounces, which measure volume, or troy ounces.
One avoirdupois ounce is 28.349523125 grams. The calculation uses that factor before formatting the display.
Yes. Enter 1/8, 0.125, or another supported decimal or fraction format.
A label or recipe may use a rounded serving convention. This tool uses the full avoirdupois mass relationship and then formats the result for display.