Grams to Ounces
Convert grams (g) to ounces (oz). Both measure mass and weight, and the conversion comes up in cooking, shipping, fitness work.
The Formula
``
ounces = grams × 0.0352739619496
grams = ounces × 28.349523125
`
One gram is 0.035274 ounces, and one ounce is 28.3495 grams.
Conversion Table
| Grams | Ounces |
|---|---|
| 1 g | 0.035274 oz |
| 2 g | 0.070548 oz |
| 5 g | 0.17637 oz |
| 10 g | 0.35274 oz |
| 25 g | 0.881849 oz |
| 50 g | 1.7637 oz |
| 100 g | 3.5274 oz |
| 500 g | 17.637 oz |
| 1,000 g | 35.274 oz |
The Other Direction
| Ounces | Grams |
|---|---|
| 1 oz | 28.3495 g |
| 2 oz | 56.699 g |
| 5 oz | 141.7476 g |
| 10 oz | 283.4952 g |
| 25 oz | 708.7381 g |
| 50 oz | 1,417.48 g |
| 100 oz | 2,834.95 g |
| 500 oz | 14,174.76 g |
| 1,000 oz | 28,349.52 g |
What Each Unit Is
Grams (g) — one thousandth of a kilogram. The metric unit for small masses; cooking, nutrition and postage all work in grams.
Ounces (oz) — one sixteenth of a pound, or exactly 28.349523125 grams. From uncia, one twelfth — of the Roman libra, before avoirdupois moved it to one sixteenth.
A Sense of Scale
A paperclip is about 1 g- A sheet of A4 is 5 g
- A tennis ball is 58 g
- A slice of bread is about 1 oz
- A tennis ball is 2 oz
- US recipes use ounces for dry goods
Precision
The factor 0.0352739619496 is rounded. For engineering work carry more digits than the table above, and round only at the end — rounding at each step compounds.
Watch Out For
- A fluid ounce measures volume, not mass, and the two are only interchangeable for water by coincidence of scale.
In Code
`javascript
const gramToOunce = (value) => value * 0.0352739619496;
``
Where This Conversion Comes Up
- Cooking
- Shipping
- Fitness
- Medicine
- Manufacturing
How Many Decimals Do You Need?
Rounding the factor costs accuracy, and how much depends on the factor. Converting 137 g with the factor truncated at each decimal place:
| Decimals kept | Factor | 137 g becomes | Error |
|---|---|---|---|
| 0 | 0 | 0 | 100.0000% |
| 1 | 0 | 0 | 100.0000% |
| 2 | 0.04 | 5.48 | 13.3981% |
| 3 | 0.035 | 4.795 | 0.7767% |
| 4 | 0.0353 | 4.8361 | 0.0738% |
The right number of significant figures is set by your input, not by the converter. If you measured grams to three significant figures, the answer in ounces is only good to three — writing more digits claims precision the measurement never had.