Weighing a US recipe in metric
Four ounces of butter becomes about 113 g on a metric scale.
Use Ounces to Grams
Converts ounces to grams in this tab, with nothing sent anywhere.
Runs entirely on your deviceThe conversion happens in this browser tab. Nothing you type is uploaded, logged or stored, which is worth knowing for anything you would not paste into a search box.
Four avoirdupois ounces of butter weigh about 113.4 g, a useful target on a metric kitchen scale. Precious metals use troy ounces instead, and liquid recipes may mean fluid ounces; neither is interchangeable here.
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Browse all general convertersAbout Ounces to Grams
Ounces appear throughout US recipes, postage tables and product weights, but a metric kitchen scale, a science task or a European form wants grams. Converting ounces to grams turns those imperial amounts into the metric figure the rest of the world measures in. One ounce is 28.35 grams, so a quarter-pound of four ounces is about 113 grams - the kind of number a metric cook needs to weigh an American recipe accurately. A metric kitchen scale reads in grams to the nearest gram, so turning a recipe's ounces into grams lets you weigh each ingredient directly instead of eyeballing an imperial measuring cup. Postage is another everyday case, where a parcel weighed in ounces on a US scale needs grams for an international courier's metric rate table. Check that a recipe specifies weight ounces rather than fluid ounces before weighing the gram result.
Using Ounces to Grams
- Type a number of oz. You can paste a value with its unit; the tool reads the number.
- The exact factor is applied and the result is shown as g, updating live as you type.
- Copy the answer, or switch to the reverse converter to go from g back to oz.
Where ounces to grams helps
Both directions
Need the opposite? The g-to-oz converter is linked below and uses the exact inverse factor.
Check whether ounces means mass
Eight ordinary weight ounces are about 226.8 g. Eight fluid ounces are a volume and cannot be converted to grams without knowing the substance and volume standard. Look for fl oz on the label before using this result in a recipe.
Before you use the result
- The result is rounded for readability, so a value converted and then converted back may differ in the last decimal place. The underlying factor is exact.
- Units in your input are ignored - only the number is read - so make sure the figure you type is really in oz.
Questions about Ounces to Grams
Is an ounce 30 grams?
Close, but the exact figure is 28.35 grams. Rounding to 30 adds up over several ingredients, so this tool uses the precise value.
Is my data uploaded?
No. Ounces to Grams does the arithmetic in this browser tab; the value is calculated on your device and is not sent to a server.
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