Ounces to Grams Converter
Convert ounces (oz) to grams (g) using documented conversion factors. Includes interactive calculations, conversion formula, worked steps, and common reference tables.
Live Interactive Calculator
gram = ounce × 28.349523Conversion Formula
To convert from ounces to grams, apply the mathematical formula:
Where oz represents ounces and g represents grams.
Conversion Factor
The base relationship defined under primary measurement standards:
Reference: NIST SP 811 / 1959 International Yard and Pound Agreement
Mass & Weight Standards: Avoirdupois vs. Metric
Everyday commerce measures mass using either the metric system (kilograms, grams) or the Avoirdupois customary system (pounds, ounces):
- The International Pound: Under the 1959 International Yard and Pound Agreement, 1 avoirdupois pound is legally defined as exactly 0.45359237 kilograms (453.59237 grams).
- Avoirdupois vs. Troy Ounces: 1 standard avoirdupois pound contains 16 ounces (each ~28.35 g). This differs from the troy ounce (~31.10 g) used exclusively for precious metals like gold and silver.
- Ton Distinctions: The US Short Ton is 2,000 lbs (907.18 kg), the Metric Tonne is 1,000 kg (2,204.62 lbs), and the UK Long Ton is 2,240 lbs (1,016.05 kg).
How to Convert Ounces to Grams
Converting measurements between ounces and grams follows a structured calculation process:
- Identify the quantity in ounces (oz) that you wish to convert.
- Multiply the input by the conversion factor ratio
1 oz = 28349523 g.. - The resulting value is the equivalent amount expressed in grams (g).
Common Ounces to Grams Reference Table
Frequently referenced values calculated using documented measurement conversion factors.
| Ounce (oz) | Gram (g) | Arithmetic Expression |
|---|---|---|
| 0.5 oz | 14.174762 g | 0.5 × 28.349523 |
| 1 oz | 28.349523 g | 1 × 28.349523 |
| 2 oz | 56.699046 g | 2 × 28.349523 |
| 3 oz | 85.048569 g | 3 × 28.349523 |
| 4 oz | 113.398093 g | 4 × 28.349523 |
| 6 oz | 170.097139 g | 6 × 28.349523 |
| 8 oz | 226.796185 g | 8 × 28.349523 |
| 12 oz | 340.194278 g | 12 × 28.349523 |
| 16 oz | 453.59237 g | 16 × 28.349523 |
| 24 oz | 680.388555 g | 24 × 28.349523 |
| 32 oz | 907.18474 g | 32 × 28.349523 |
Worked Calculation Examples
Practical step-by-step calculations showing how to convert ounces to grams with exact mathematical equations.
Application context: 1 oz is exactly 28.349523125 grams
Application context: Half-pound package (226.8 grams)
Application context: 1 full pound (453.59 grams)
About the Units
Authoritative technical specifications and historical definitions for both units.
Ounce (oz)
The avoirdupois ounce is equal to 1/16 of an avoirdupois pound, exactly 28.349523125 grams. Not to be confused with the troy ounce (31.1035 g) used for precious metals or fluid ounces.
Gram (g)
A metric unit of mass equal to one-thousandth of a kilogram (10^-3 kg). Widely used in chemistry, medicine, and nutritional facts.
Need to convert Grams back to Ounces?
Reverse Formula: ounce = gram × 0.035274
Related Weight & Mass Converters
Contextual conversions related to this pair within the measurement graph.