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 |
Ounces and grams are the two primary small-mass units used globally for kitchen recipe baking, restaurant ingredient portioning, packaged food nutrition labeling, USPS postal letter mailing, and laboratory chemistry. While the avoirdupois ounce (oz) is the standard customary unit used across North American grocery packaging and food recipes, the gram (g) is the official metric subunit (1/1,000th of a kilogram) used in European baking, international trade, and scientific research.
Our free online Ounces to Grams Converter provides instant, high-precision mass conversions in both directions:
- Ounces to Grams: Multiply ounces by
28.349523125(exact international standard). - Grams to Ounces: Divide grams by
28.349523125(or multiply by0.03527396).
Avoirdupois Ounce vs. Troy Ounce (Gold & Bullion)
When converting ounces to grams, it is important to distinguish between standard grocery ounces and precious metal troy ounces:
| Ounce Type | Symbol / Abbreviation | Primary Applications | Exact Value in Grams (g) |
|---|---|---|---|
| Avoirdupois Ounce (Common) | oz |
Food recipes, groceries, postal mail, everyday weight | 28.349523125 g (exact) |
| Troy Ounce (Precious Metals) | oz t or t oz |
Gold, silver, platinum, gemstones, bullion coins | 31.103476800 g (exact) |
Step-by-Step Calculation Example
To convert 15 avoirdupois ounces to grams:
15 oz × 28.349523125 = 425.242847 grams
Thus, 15 ounces is equal to approximately 425.24 g.
Ounce to Gram Conversion Table
Below is a quick reference lookup table converting customary culinary and postal weights from 0.01 oz up to 1,000 oz:
| Ounces (oz) | Grams (g) | Baking, Grocery & Nutrition Benchmark |
|---|---|---|
| 0.01 oz | 0.283495 g | 283.5 milligrams |
| 0.10 oz | 2.834952 g | 2.835 grams |
| 1.00 oz | 28.349523 g | 1.0 Ounce Exact Benchmark (28.35 grams) |
| 2.00 oz | 56.699046 g | 56.7 grams (1/8 lb) |
| 3.53 oz | 100.000000 g | 100-Gram Nutrition Label Facts Benchmark (3.527 oz) |
| 4.00 oz | 113.398092 g | 1 stick of butter / 1/4 lb burger patty (≈ 113.4 g) |
| 8.00 oz | 226.796185 g | Half-pound food portion / 2 sticks of butter (≈ 226.8 g) |
| 10.00 oz | 283.495231 g | 283.5 grams |
| 16.00 oz (1 lb) | 453.592370 g | 1.0 Pound Exact Benchmark (453.59 grams) |
| 20.00 oz | 566.990463 g | 567.0 grams (1.25 lbs) |
| 50.00 oz | 1,417.476156 g | 1.417 Kilograms (3.125 lbs) |
| 100.00 oz | 2,834.952313 g | 2.835 Kilograms (6.25 lbs) |
| 1,000.00 oz | 28,349.523125 g | 28.35 Kilograms (62.5 lbs) |
History & Standards: Avoirdupois Ounce vs. Metric Gram
The Origin of the Ounce (oz)
The term ounce stems from the Latin uncia (meaning 1/12th part of a Roman copper bar libra). In 13th-century England, merchants established the avoirdupois system for general commerce, dividing the pound into 16 ounces (1 oz = 28.349523125 grams) because 16 can be halved cleanly three times (8, 4, 2). In 1959, the International Yard and Pound Agreement locked the avoirdupois ounce to its modern exact metric definition.
The SI Metric Gram (g)
Created in France in 1795, the gram was originally defined as the absolute weight of pure ice-cold water in a cubic centimeter (1 cm³). Later redefined as 1/1,000th of an SI kilogram, the gram is the universal metric standard for culinary baking scales, dietary nutrition facts, and laboratory science.
To convert grams back to ounces, visit our Grams to Ounces Converter. For pound conversions, check our Pounds to Ounces Converter or Ounces to Pounds Converter. 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 common avoirdupois ounce (commonly rounded to 28.35 g).
How many ounces are in 100 grams?
100 grams equals approximately 3.527 ounces (100 ÷ 28.3495 = 3.527 oz).
What is a 4-ounce stick of butter in grams for baking?
A 4-ounce stick of butter equals 4 × 28.3495 = 113.4 grams.
What is the difference between an avoirdupois ounce and a troy ounce in grams?
A standard grocery avoirdupois ounce is 28.35 grams, while a gold/bullion troy ounce is larger at 31.10 grams.