Convert a weight in grams to U.S. fluid ounces of volume. A fluid ounce of water weighs about 29.6 g, but a fluid ounce of oil only about 27 g.
How to use the Grams to Fluid Ounces Converter
- Ingredient
- Custom density
- Grams
- Every result field is editable: type into US fluid ounces or any other result and Grams plus every other field update to match.
Results update as you type, and every field accepts the units shown in its menu.
How it works
The calculator converts your weight to SI units, looks up the density of the selected ingredient in kg/m³ and divides. The result is then shown in US fluid ounces and other common units. Every result field is editable, so you can work backwards too.
How to convert grams to US fluid ounces
- Find the density of the ingredient (the menu fills it in for you).
- Convert the weight to SI units if needed.
- Divide mass by density to get volume.
- Convert the answer to US fluid ounces.
1 gram of common ingredients in US fluid ounces
| Ingredient | US fluid ounces per 1 g |
|---|---|
| Water | 0.033814023 |
| Milk (whole) | 0.032797306 |
| Heavy cream | 0.033612349 |
| Plain yogurt | 0.032639018 |
| Honey | 0.023596666 |
| Maple syrup | 0.025404976 |
| Olive oil | 0.037036169 |
| Vegetable oil | 0.036714465 |
| Butter | 0.035259669 |
| All-purpose flour | 0.06404171 |
| Granulated sugar | 0.040016595 |
| Brown sugar (packed) | 0.036359164 |
| Powdered sugar | 0.066694325 |
| Table salt | 0.027784735 |
| White rice (uncooked) | 0.043240438 |
| Rolled oats | 0.098871411 |
| Cocoa powder | 0.093151578 |
| Peanut butter | 0.031251407 |
| Almonds (whole) | 0.055983481 |
Densities used
| Ingredient | kg/m³ | g/mL | lb/US gal |
|---|---|---|---|
| Water | 1,000 | 1 | 8.3454045 |
| Milk (whole) | 1,031 | 1.031 | 8.604112 |
| Heavy cream | 1,006 | 1.006 | 8.3954769 |
| Plain yogurt | 1,036 | 1.036 | 8.645839 |
| Honey | 1,433 | 1.433 | 11.958965 |
| Maple syrup | 1,331 | 1.331 | 11.107733 |
| Olive oil | 913 | 0.913 | 7.6193543 |
| Vegetable oil | 921 | 0.921 | 7.6861175 |
| Butter | 959 | 0.959 | 8.0032429 |
| All-purpose flour | 528 | 0.528 | 4.4063736 |
| Granulated sugar | 845 | 0.845 | 7.0518668 |
| Brown sugar (packed) | 930 | 0.93 | 7.7612261 |
| Powdered sugar | 507 | 0.507 | 4.2311201 |
| Table salt | 1,217 | 1.217 | 10.156357 |
| White rice (uncooked) | 782 | 0.782 | 6.5261063 |
| Rolled oats | 342 | 0.342 | 2.8541283 |
| Cocoa powder | 363 | 0.363 | 3.0293818 |
| Peanut butter | 1,082 | 1.082 | 9.0297276 |
| Almonds (whole) | 604 | 0.604 | 5.0406243 |
Inputs explained
| Field | What to enter |
|---|---|
| Ingredient | Choose one: Water, Milk (whole), Heavy cream, Plain yogurt … |
| Custom density | Units: g/cm³, kg/m³, kg/L, lb/ft³, lb/US gal |
| Grams | Units: g, kg, mg, µg, dag, t … |
What each result means
- US fluid ounces = [Grams] ÷ [Density used]
- Millilitres = [Grams] ÷ [Density used]
- US cups = [Grams] ÷ [Density used]
Formula
volume = mass ÷ densityWorked example
Inputs — Ingredient: Water; Custom density: 1 g/cm³; Grams: 100 g.
Results — Density used = 1 g/cm³; US fluid ounces = 3.381402 US fl oz; Millilitres = 100 mL; US cups = 0.422675 US cup.
Frequently asked questions
How many fl oz is 100 g of water?
About 3.38 US fl oz.
Is an ounce the same as a fluid ounce?
No: an ounce is weight, a fluid ounce is volume.
Why does the answer change with the ingredient?
Grams and US fluid ounces measure different things (weight and volume), so the conversion depends on how dense the material is.
What if my ingredient is not listed?
Choose “Custom density” and type its density; the label or a quick weigh-and-measure test will give it.
What formula does the Grams to Fluid Ounces Converter use?
volume = mass ÷ density.