# Grams to Fluid Ounces Converter (by Ingredient)

URL: https://speedycalculator.com/calculators/conversion/grams-to-fl-oz/
Last updated: 2026-10-25

> Convert grams to US fluid ounces for water and 18 other ingredients, or enter your own density. Because grams measure weight and US fluid ounces measure volume, the result depends on the substance: volume = mass ÷ density.

## Inputs

- Ingredient
- Custom density (g/cm³, kg/m³, kg/L, lb/ft³, lb/US gal)
- Grams (g, kg, mg, µg, dag, t, lb, oz, st, US ton, UK ton, gr, dr, ozt, lb t, ct, tola, amu (Da), M⊕)

## Results

- Density used
- US fluid ounces
- Millilitres
- US cups

## Formula

```
volume = mass ÷ density
```

## Explanation

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

IngredientUS fluid ounces per 1 gWater0.033814023Milk (whole)0.032797306Heavy cream0.033612349Plain yogurt0.032639018Honey0.023596666Maple syrup0.025404976Olive oil0.037036169Vegetable oil0.036714465Butter0.035259669All-purpose flour0.06404171Granulated sugar0.040016595Brown sugar (packed)0.036359164Powdered sugar0.066694325Table salt0.027784735White rice (uncooked)0.043240438Rolled oats0.098871411Cocoa powder0.093151578Peanut butter0.031251407Almonds (whole)0.055983481

### Densities used

Ingredientkg/m³g/mLlb/US galWater1,00018.3454045Milk (whole)1,0311.0318.604112Heavy cream1,0061.0068.3954769Plain yogurt1,0361.0368.645839Honey1,4331.43311.958965Maple syrup1,3311.33111.107733Olive oil9130.9137.6193543Vegetable oil9210.9217.6861175Butter9590.9598.0032429All-purpose flour5280.5284.4063736Granulated sugar8450.8457.0518668Brown sugar (packed)9300.937.7612261Powdered sugar5070.5074.2311201Table salt1,2171.21710.156357White rice (uncooked)7820.7826.5261063Rolled oats3420.3422.8541283Cocoa powder3630.3633.0293818Peanut butter1,0821.0829.0297276Almonds (whole)6040.6045.0406243

### Inputs explained

FieldWhat to enterIngredientChoose one: Water, Milk (whole), Heavy cream, Plain yogurt …Custom densityUnits: g/cm³, kg/m³, kg/L, lb/ft³, lb/US galGramsUnits: 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]

## Worked 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.

## FAQ

**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.


## Sources

- [USDA FoodData Central – household measure weights](https://fdc.nal.usda.gov/)