Convert grams to ounces
PrintGram to Ounce Conversion Table
| Gram (g) | Ounce (oz) |
|---|---|
| 0.01 g | 0.0003527396 oz |
| 0.1 g | 0.0035273962 oz |
| 1 g | 0.0352739619 oz |
| 2 g | 0.0705479238 oz |
| 3 g | 0.1058218858 oz |
| 5 g | 0.1763698097 oz |
| 10 g | 0.3527396195 oz |
| 20 g | 0.7054792390 oz |
| 50 g | 1.7636980975 oz |
| 100 g | 3.5273961949 oz |
| 1000 g | 35.2739619495 oz |
Grams and ounces are two of the most common mass units used in baking, cooking, coffee brewing, nutrition labeling, postal shipping, and laboratory chemistry. While the gram (g) is the standard decimal metric unit used globally for food recipes and scientific measurements, the avoirdupois ounce (oz) is the standard customary unit used in the United States and international commerce.
Our free online Grams to Ounces Converter provides instant, accurate mass conversions in both directions:
- Grams to Ounces: Multiply grams by
0.03527396(or divide by28.349523). - Ounces to Grams: Multiply ounces by
28.349523(exact international standard).
Exact Conversion Formulas: Grams & Ounces
Since the International Yard and Pound Agreement of 1959, one international avoirdupois ounce is defined as exactly 28.349523125 grams (1/16th of a pound). This establishes exact mathematical relationships:
| Conversion Direction | Exact Mathematical Formula | Quick Mental Approximation Rule |
|---|---|---|
| Grams to Ounces | Ounces = Grams ÷ 28.349523 |
Divide grams by 28 (e.g., 100 g ÷ 28 = 3.57 oz). |
| Ounces to Grams | Grams = Ounces × 28.349523 |
Multiply ounces by 28.3 (e.g., 4 oz × 28.3 = 113.2 g). |
Step-by-Step Calculation Example
To convert 15 grams to ounces:
15 g ÷ 28.349523 = 0.529109 ounces (or 15 × 0.03527396 = 0.529109 oz)
Thus, 15 grams is equivalent to approximately 0.53 ounces (roughly half an ounce).
Gram to Ounce Conversion Table
Below is a quick reference lookup table for converting recipe ingredients and packaged items from 0.01 g up to 1,000 g:
| Grams (g) | Exact Equivalent in Ounces (oz) | Culinary & Everyday Benchmark |
|---|---|---|
| 0.01 g | 0.00035274 oz | 10 milligrams (micro-scale lab dose) |
| 0.1 g | 0.00352740 oz | Pinch of fine table salt |
| 1.0 g | 0.03527396 oz | 1 mL of pure water mass |
| 2.5 g | 0.08818490 oz | US Penny coin mass |
| 5.0 g | 0.17636981 oz | US Nickel coin mass / 1 teaspoon sugar |
| 10.0 g | 0.35273962 oz | Single espresso dose / 1 tablespoon butter |
| 28.35 g (1 Ounce Exact) | 1.00000000 oz | 1.0 Ounce Exact International Standard |
| 50.0 g | 1.76369810 oz | Standard hen’s egg mass |
| 100.0 g | 3.52739620 oz | Standard FDA nutrition facts serving unit |
| 250.0 g | 8.81849049 oz | European butter block (~1/2 lb) |
| 453.59 g (1 Pound Exact) | 16.00000000 oz | 1 Avoirdupois Pound (16 oz) |
| 1,000.0 g (1 kg) | 35.27396195 oz | 1 Kilogram = 35.27 oz (2.20 lbs) |
History & Origins: Gram vs. Ounce
The Origin of the Gram (g)
The gram was established in 1795 in France during the French Revolution as the fundamental unit of mass in the metric system. Originally defined as the absolute mass of one cubic centimeter (1 cm³ / 1 mL) of pure water at the melting point of ice (4°C). Later, the gram was redefined as 1/1,000th of the kilogram (the base SI mass unit), which is now defined quantum-mechanically using Planck’s constant (h = 6.62607015 × 10-34 J·s).
The Origin of the Ounce (oz)
The English word ounce derives from the Latin uncia, meaning “one-twelfth” part of a Roman copper balance bar (libra). The same Latin root gave rise to the English word inch. In 13th-century English trade, the avoirdupois system divided the merchant pound into 16 ounces. Standardized in 1959 across international standards bureaus, 1 avoirdupois ounce equals exactly 28.349523125 grams.
To convert larger mass units between kilograms and pounds, use our Kg to Lbs Converter or Weight Calculator. For density and volume calculations, visit our Mass Calculator. For general unit transformations, explore our Conversion Calculator.
Frequently Asked Questions (FAQ)
How many grams are in 1 ounce?
There are exactly 28.349523125 grams in 1 avoirdupois ounce (commonly rounded to 28.35 grams for cooking).
How many ounces are in 100 grams?
There are approximately 3.5274 ounces in 100 grams (100 ÷ 28.349523).
How do I convert a baking recipe from grams to ounces?
Divide the weight in grams by 28.35:
- 100 g flour =
100 ÷ 28.35 = 3.53 oz - 250 g sugar =
250 ÷ 28.35 = 8.82 oz - 500 g butter =
500 ÷ 28.35 = 17.64 oz
What is the difference between a fluid ounce (fl oz) and an avoirdupois ounce (oz)?
An avoirdupois ounce (oz) measures mass/weight (28.35 g). A fluid ounce (fl oz) measures liquid volume (29.57 mL in US customary, or 28.41 mL in UK imperial). They are only numerically close when measuring pure water (1 fl oz of water weighs approximately 1.04 oz).