1 Ounce to Gram
Quick answer
1 Ounce (oz) equals
28.349523 g
To convert 1 Ounces to Grams, multiply by 28.349523125. Therefore, 1 Ounce (oz) equals 28.349523 Gram (g).
Formula: g = oz × 28.349523125. Calculation: 1 × 28.349523125 = 28.349523 g.
Convert Ounce (oz) to Gram (g) online with our free unit converter. In mass, 1 oz = 28.349523 g. Explore step-by-step conversion steps, mathematical formulas, and quick conversion reference tables below.
Worked example: converting Ounce to Gram
- Step 1 — start with the formula. g = oz × 28.349523125
- Step 2 — substitute your figure. 1 oz × 28.349523125
- Step 3 — read the result. 1 oz = 28.349523 g
- Step 4 — check it in reverse. oz = g × 0.0352739619 returns 1 oz, which matches the figure you started with.
Mass Converter
26 units available
1 oz = 28.349523 g
Formula:
g = oz × 28.349523125With your value: 1 oz = 28.34952313 g
How big is that?
Everyday references on a logarithmic scale, all expressed in ounce so you can sanity-check the result.
Other Ounce to Gram conversions
Ounce to Gram Conversion Table
| Ounce (oz) | Gram (g) |
|---|---|
| 0.5 | 14.174762 |
| 1 | 28.349523 |
| 2 | 56.699046 |
| 5 | 141.747616 |
| 10 | 283.495231 |
| 15 | 425.242847 |
| 20 | 566.990463 |
| 25 | 708.738078 |
| 50 | 1,417.476156 |
| 100 | 2,834.952313 |
| 250 | 7,087.380781 |
| 500 | 14,174.761563 |
| 1000 | 28,349.523125 |
Gram to Ounce Conversion Table
| Gram (g) | Ounce (oz) |
|---|---|
| 0.5 | 0.017637 |
| 1 | 0.035274 |
| 2 | 0.070548 |
| 5 | 0.17637 |
| 10 | 0.35274 |
| 15 | 0.529109 |
| 20 | 0.705479 |
| 25 | 0.881849 |
| 50 | 1.763698 |
| 100 | 3.527396 |
| 250 | 8.81849 |
| 500 | 17.636981 |
| 1000 | 35.273962 |
Where these values come from
Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.
Ounce (oz)
Mass
1 avoirdupois ounce = 1/16 lb = 0.028 349 523 125 kg exactly.
Source: International Yard and Pound Agreement of 1959; NIST Federal Register Notice 59-5442
US, UK, Canada, Australia, New Zealand, South Africa · Reviewed 2026-07-01
Gram (g)
Mass
Traceable to the kilogram, defined by fixing the Planck constant at 6.626 070 15 × 10⁻³⁴ J·s. Avoirdupois masses derive from the 1959 international pound (0.453 592 37 kg exactly).
Source: BIPM, The International System of Units (SI), 9th edition, 2019 (updated 2024)
Bureau International des Poids et Mesures · Reviewed 2026-07-01
Standards and context behind Ounce to Gram
- Avoirdupois ounce
- 1/16 lb, exactly 28.349523125 g.
- Troy ounce
- A different unit at 31.1034768 g, used only for precious metals — a common source of error.
How to Convert Ounce to Gram
To convert from Ounce (oz) to Gram (g), multiply the value by 28.349523125.
Formula: g = oz × 28.349523125
Reverse: oz = g × 0.0352739619
Step-by-Step Example
- Start with your value in Ounce. For example: 5 oz
- Multiply by the conversion factor: 5 x 28.349523125
- The result is: 141.747616 g
Ounce and Gram Relationship
This conversion bridges the US Customary / Imperial and Metric (SI) measurement systems, commonly required when translating scientific data, international engineering specifications, or trade standards. Since 1 Ounce equals approximately 28.3495 Grams, the Ounce represents a larger unit interval than the Gram. Understanding the relationship between Ounce and Gram is essential for accurate calculations in physics, engineering, commerce, and daily applications.
About Ounce
The ounce (oz) equals 1/16 of a pound or approximately 28.35 grams. It is used for food portions and small weight measurements.
Common uses of Ounce: food portions, postal mail, precious metals.
About Gram
The gram equals one thousandth of a kilogram. It is commonly used for measuring food, ingredients, and small items.
Common uses of Gram: cooking, nutrition labels, jewelry.
Frequently Asked Questions
- What is 1 Ounce in Gram?
- 1 Ounce equals 28.349523 Gram.
- How many Grams are in 1 Ounce?
- There are exactly 28.349523125 Grams in 1 Ounce. This means the conversion factor from Ounce to Gram is 28.349523125.
- What is the formula to convert Ounce to Gram?
- The formula to convert Ounce to Gram is: g = oz × 28.349523125. For example, to convert 10 Ounces to Grams, you would multiply 10 by 28.349523125.
- What is a Ounce?
- The ounce (oz) equals 1/16 of a pound or approximately 28.35 grams. It is used for food portions and small weight measurements.
- What is a Gram?
- The gram equals one thousandth of a kilogram. It is commonly used for measuring food, ingredients, and small items.
- What are the common uses of Ounce?
- The Ounce is commonly used in food portions, postal mail, precious metals.
- Is a food ounce the same as a gold ounce?
- No. A food (avoirdupois) ounce is 28.3495 g; a troy ounce used for gold and silver is 31.1035 g, about 10% heavier.
Related Mass Conversions
Cite this page
UnitConvertLab. (2026). 1 Ounce to Gram. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/1-ounce-to-gram