How to Convert Grams to Ounces (g to oz)
Weight units matter at the wet market, where older stalls and Chinese medical halls still quote prices per kati or tael, and when following American recipes in ounces and pounds. This guide shows how to convert grams into ounces by hand, with examples and a quick-reference table.
The conversion
To convert grams to ounces, multiply the value by 0.0352739619. To go the other way, divide by the same number (or multiply by 28.349523125). For a quick estimate, multiply by about 0.035.
Ounces = grams × 0.0352739619
Worked examples
- 3 g = 0.105822 oz
- 12.5 g = 0.440925 oz
- 75 g = 2.6455 oz
Grams to Ounces table
| Grams | Ounces |
|---|---|
| 1 g | 0.035274 oz |
| 2 g | 0.070548 oz |
| 5 g | 0.17637 oz |
| 10 g | 0.35274 oz |
| 20 g | 0.705479 oz |
| 25 g | 0.881849 oz |
| 50 g | 1.7637 oz |
| 100 g | 3.5274 oz |
| 250 g | 8.8185 oz |
| 500 g | 17.637 oz |
| 1,000 g | 35.274 oz |
Common questions
Is g to oz exact?
The factors used here are the internationally defined values where they exist; results are rounded for display only.
How do I convert back?
Use the Ounces to Grams converter.
Mistakes to avoid
Dropping the units
A bare number without a unit is easy to misread later. Always write the unit with the result.
Rounding the factor too early
Using 3 instead of 3.28 for feet per metre introduces an error of almost 9% before you have started.
Forgetting squared and cubed units
Area and volume factors are the length factor squared or cubed, so 1 m² is about 10.76 sq ft, not 3.28.
Background
Many conversion factors are exact by definition. The inch has been defined as exactly 2.54 centimetres since 1959, and the pound as exactly 0.45359237 kilograms, so conversions involving them can be as precise as you need.
For everyday use, three or four significant figures are usually enough. Engineering, science and trade documents may need more, and rounding should happen only at the end of a calculation.
Singapore adopted the metric system in the 1970s, replacing imperial units and traditional Chinese measures in most official uses. Metric units are now standard in schools, trade and government, but older units survive in property, markets and imported goods.
For any value, use the Grams to Ounces Converter or browse all weight converters.
Run your own numbers: Grams to Ounces Converter