How to convert ounces to grams
Apply the documented ounces-to-grams relationship below, keeping the full stored constant until the displayed result is rounded.
Ounces × 28.349523125 = Grams
For example, 10 oz equals 283.49523125 g.
Ounces to Grams reference table
| Ounces | Grams |
|---|---|
| 1 oz | 28.34952313 g |
| 5 oz | 141.74761563 g |
| 10 oz | 283.49523125 g |
| 25 oz | 708.73807813 g |
| 50 oz | 1,417.47615625 g |
| 100 oz | 2,834.9523125 g |
Method and quality checks
- Calculation
- Ounces × 28.349523125 = Grams. The calculator keeps the stored factor through the operation and rounds only the displayed result to the selected or page-supported precision.
- Unit convention
- The page treats pounds and ounces as avoirdupois mass units. It does not convert mass into force or use troy units.
- Input validation
- Finite numeric inputs are accepted. Results outside the supported numeric range are rejected instead of being displayed as valid measurements.
- Reasonableness check
- 10 oz produces 283.49523125 g. Check the direction and approximate scale before relying on a more precise displayed value.
Deeper method: How significant figures work.
Ounces to grams without volume confusion
This converter uses the avoirdupois ounce of mass, not the US fluid ounce. The exact mass relationship is 1 ounce = 28.349523125 grams, which is suitable for food, parcels, and everyday objects.
- Confirm that the source label says oz rather than fl oz.
- For kitchen work, ingredient mass is usually more repeatable than scooped volume.
- Round only after checking a package or carrier limit.
Reference: NIST mass conversion factors.