US fluid ounces = grams × 8 ÷ grams per US cup
A regular ounce, written oz, measures mass. A fluid ounce, written fl oz, measures volume. They answer different questions and cannot be exchanged without density information.
Grams to Fluid Ounces Converter
Grams measure mass and fluid ounces measure volume, so ingredient density is required. For water, 100 grams is about 3.38 US fluid ounces.
Choose an ingredient before converting. Results use US fluid ounces, not Imperial fluid ounces or weight ounces.
Grams to Fluid Ounces Converter
Enter a non-negative gram amount and choose the ingredient.
Grams to Fluid Ounces Converter
Results are practical kitchen estimates based on the selected ingredient state.
Use the calculator for any amount. The chart provides quick reference values.
Swipe horizontally to view every column
| Ingredient | Grams per cup | 100 g result | Ingredient state |
|---|---|---|---|
| All-Purpose Flour | 120 g | 6.667 fl oz | unsifted, fluffed, spooned and leveled |
| Granulated Sugar | 198 g | 4.04 fl oz | white granulated sugar, leveled |
| Brown Sugar | 213 g | 3.756 fl oz | light or dark brown sugar, packed |
| Butter | 227 g | 3.524 fl oz | solid butter |
| Powdered Sugar | 113 g | 7.08 fl oz | confectioners' sugar, unsifted and not packed |
| Unsweetened Cocoa Powder | 84 g | 9.524 fl oz | unsweetened cocoa powder, spooned and leveled |
| Honey | 340 g | 2.353 fl oz | pourable honey at room temperature |
| Fresh Milk | 244 g | 3.278 fl oz | fresh dairy milk |
| Old-Fashioned Rolled Oats | 89 g | 8.989 fl oz | old-fashioned or quick-cooking oats, uncooked |
| Vegetable Oil | 198 g | 4.04 fl oz | liquid vegetable oil |
| Long-Grain White Rice | 185 g | 4.324 fl oz | uncooked long-grain white rice |
| Water | 237 g | 3.376 fl oz | water in one US customary cup |
| Chocolate Chips | 170 g | 4.706 fl oz | standard chocolate chips |
| Whole Almonds | 142 g | 5.634 fl oz | whole unblanched almonds |
This page uses the US customary fluid ounce. One US cup contains 8 US fluid ounces. Imperial fluid ounces are a different size, so results from UK references may not match.
Kitchen densities vary with brand, temperature, packing and ingredient form. Treat the results as practical recipe estimates and use the original gram weight when precision matters.
Worked grams to fl oz examples
These examples show the formula with common amounts.
100 grams of water
100 × 8 ÷ 237 = approximately 3.38 US fluid ounces.
100 grams of flour
100 × 8 ÷ 120 = approximately 6.67 US fluid ounces by volume.
100 grams of honey
100 × 8 ÷ 340 = approximately 2.35 US fluid ounces.
Method and source
How this conversion was checked
Results are practical kitchen estimates based on the selected ingredient state. The calculator validates the input and applies the formula shown on this page.
Density reference: GramstoCup.co ingredient dataset
Volume standard: US customary cup and NIST household conversions
How many fluid ounces is 100 grams?
The ingredient must be known. One hundred grams is about 3.38 US fluid ounces of water, 6.67 fluid ounces of flour by volume or 2.35 fluid ounces of honey.
Are grams and fluid ounces equivalent?
No. Grams measure mass and fluid ounces measure volume.
Is a fluid ounce the same as an ounce?
No. A fluid ounce measures volume while an ounce measures mass.
Does this calculator use US or Imperial fluid ounces?
It uses US customary fluid ounces. Imperial fluid ounces are different.
Why do I need to select an ingredient?
The ingredient provides the density needed to convert mass into volume.
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