Grams to Ounces Converter
To convert grams to ounces, divide by 28.349523125. One international avoirdupois ounce equals exactly 28.349523125 grams, so this factor is definitional and exact.
Formula
ounces = grams ÷ 28.349523125
Equivalently:
ounces = grams × 0.03527396194958041
Reverse:
grams = ounces × 28.349523125
Formula variables
- grams — mass in grams (g).
- ounces — equivalent mass in international avoirdupois ounces (oz).
- 28.349523125 — the exact number of grams in one international avoirdupois ounce, defined as 1/16 of a pound (0.45359237 kg ÷ 16).
Worked Examples
Example 1: 1 gram to ounces
- Start: 1 g.
- Divide: 1 ÷ 28.349523125 = 0.03527396194958041.
- Result: 1 gram ≈ 0.035274 ounces.
Example 2: 100 grams to ounces
- Start: 100 g.
- Divide: 100 ÷ 28.349523125 = 3.527396194958041.
- Result: 100 grams ≈ 3.5274 ounces. This is a common ingredient amount in recipes.
Example 3: 500 grams to ounces
- Start: 500 g.
- Divide: 500 ÷ 28.349523125 = 17.636980974790207.
- Result: 500 grams ≈ 17.637 ounces. A bit more than a pound (16 oz).
Common Conversion Table
| Grams (g) | Ounces (oz) |
|---|---|
| 1 | 0.035274 |
| 5 | 0.176370 |
| 10 | 0.352740 |
| 25 | 0.881849 |
| 50 | 1.763698 |
| 100 | 3.527396 |
| 150 | 5.291094 |
| 250 | 8.818490 |
| 500 | 17.636981 |
| 1000 | 35.273962 |
Cooking Reference (Common Ingredient Amounts)
| Grams | Ounces | Approximate amount |
|---|---|---|
| 28.35 | 1.00 | 1 ounce / 2 tbsp butter |
| 50 | 1.76 | Small handful of nuts |
| 100 | 3.53 | 1/2 cup butter (1 stick is 113 g) |
| 125 | 4.41 | 1 cup all-purpose flour |
| 200 | 7.05 | 1 cup granulated sugar |
| 227 | 8.01 | 1/2 pound |
| 454 | 16.01 | 1 pound |
Real-World Uses
- Cooking and baking: Ingredient weights in recipes may be given in grams (common internationally) or ounces (US). Conversions are routine in international recipe interpretation.
- Nutrition labels: Serving sizes are given in grams and ounces on many products, especially for international distribution.
- Postal and shipping: Letter and parcel weights are measured in grams in most of the world; US postal services use ounces.
- Pharmaceuticals: Drug doses are almost universally given in milligrams or grams; clinical notes sometimes convert to ounces for patient-facing material (uncommon but documented).
- Precious metals: Note that this converter is for avoirdupois ounces; gold, silver, and platinum are usually traded in troy ounces (31.1034768 g), which is different.
Unit Definitions
Gram (g)
The gram is 1/1000 of a kilogram, the SI base unit of mass. Since 2019, the kilogram is defined by fixing the Planck constant to exactly 6.62607015 × 10⁻³⁴ J·s. The gram is therefore a derived but exact unit.
Ounce (oz)
The international avoirdupois ounce is defined as exactly 1/16 of an international avoirdupois pound, which is 0.45359237 kg. This makes one ounce equal to exactly 28.349523125 grams. Note that the "troy ounce" and "fluid ounce" are different units with different values.
Accuracy and Rounding
Because one ounce equals exactly 28.349523125 grams, the conversion is mathematically exact (subject to floating-point representation). Display precision scales with input magnitude.
Related Converters
- Ounces to Grams — the reverse conversion
- Kilograms to Pounds
- Pounds to Kilograms
- Troy Ounces to Grams
- All Mass Converters
Frequently Asked Questions
How many ounces in a gram?
One gram equals approximately 0.03527396 ounces. The exact factor is 1/28.349523125 because one international avoirdupois ounce equals exactly 28.349523125 grams.
How do you convert grams to ounces?
Divide the gram value by 28.349523125. For example, 100 g ÷ 28.349523125 ≈ 3.5274 oz.
How many grams are in an ounce?
One international avoirdupois ounce equals exactly 28.349523125 grams.
Is a gram heavier than an ounce?
No. One ounce is about 28.35 grams, so an ounce is roughly 28 times heavier than a gram.
What is 100 g in ounces?
100 grams = 3.52739619 ounces approximately, or about 3.53 oz.