Convert oz to g

One ounce equals 28.349523 grams. To convert any number of ounces to grams, multiply by 28.34952313.

The converter above works in both directions and updates as you type. Below you will find the formula, a worked example and a reference table of common values.

Weight and mass conversions matter most in three places: shipping, where a rate band can turn on a single kilogram; cooking, where recipes cross between metric grams and imperial ounces; and personal weight, where Britain and Ireland use stones, the United States uses pounds, and everywhere else uses kilograms. Strictly these are mass units rather than weight units, and the distinction only bites in physics, where weight is a force measured in newtons.

oz to g formula

To go the other way, use ounce = gram ÷ 28.34952313.

About these units

The avoirdupois ounce is 1/16 of a pound. It should not be confused with the troy ounce used for precious metals, which is about 10% heavier.

The gram is a thousandth of a kilogram. It is the base unit of nearly every recipe outside the US, and the reason kitchen scales beat cup measures for consistency.

Ounce is also written ounces and ozs. Gram is also written gramme, grammes, grams, gm and gms.

Sources

1. National Bureau of Standards, "Refinement of Values for the Yard and the Pound", Federal Register, 1 July 1959 — the international yard as exactly 0.9144 m and the avoirdupois pound as exactly 0.45359237 kg.