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How to Convert Grams to Ounces
Convert grams to ounces and back with the exact avoirdupois factor. Learn why kitchen ounces differ from troy ounces and how to check your weights.
The Exact Gram to Ounce Factor
One avoirdupois ounce equals exactly 28.349523125 grams. This is the ounce used for food, mail, and everyday weight, so it is the one the converter applies. Going the other way, one gram equals about 0.0352739619 ounces.
For rough estimates, an ounce is close to 28 grams, so a 200 gram portion is a little over 7 ounces. That shortcut is fine for a snack label, but the tool uses the full factor when precision matters, such as scaling a recipe or weighing postage near a price break.
Avoirdupois Versus Troy Ounces
Not every ounce is the same weight. The avoirdupois ounce at 28.349523125 grams covers groceries, letters, and most consumer products. The troy ounce, used for gold, silver, and other precious metals, is heavier at about 31.1034768 grams.
That difference of roughly 10 percent is why a troy ounce of gold weighs more than a kitchen ounce of flour. If you are pricing bullion, use troy figures. For food and shipping, the avoirdupois ounce this converter uses is the correct one.
Converting Step by Step
The converter works in both directions and updates instantly, running fully in your browser so nothing you type leaves your device.
- 1Open the grams to ounces converter and pick your starting unit.
- 2Enter a value, for example 250 grams, into the field.
- 3Read the result, which shows 250 grams as about 8.82 ounces.
- 4Swap direction by entering an ounce value to see the gram equivalent.
- 5If you are weighing precious metals, remember to switch your thinking to troy ounces instead.
Common Everyday Uses
Cooking is the top reason people convert. Many recipes list ingredients in grams for accuracy while your kitchen scale reads ounces, or the reverse. Converting lets you follow any recipe without buying new equipment.
Shipping and mailing also depend on ounces in the US, so a parcel weighed in grams needs converting to stay under a rate threshold. Hobbyists measuring coffee, spices, or craft materials use the same conversion to match instructions written for another region.
Frequently asked questions
How many grams are in an ounce?
One avoirdupois ounce is exactly 28.349523125 grams. For quick estimates you can round to 28.35 grams, or think of it as about 28 grams per ounce.
Why do some ounces weigh more?
Precious metals use the troy ounce, about 31.1034768 grams, which is heavier than the 28.349523125 gram avoirdupois ounce used for food and mail.
Can I convert ounces back to grams here?
Yes. The converter works both directions. Enter an ounce value and it returns the exact gram equivalent using the same avoirdupois factor.
Tools mentioned in this guide
Grams to Ounces Converter
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