The factor
oz = g ÷ 28.349523125, which is g × 0.03527396195. Dividing by 28 is a close mental shortcut: 250 g gives 8.93 against the real 8.82 oz.
Worked examples
Rounded to two decimal places:
| Grams | Ounces |
|---|---|
| 10 g | 0.35 oz |
| 25 g | 0.88 oz |
| 50 g | 1.76 oz |
| 100 g | 3.53 oz |
| 125 g | 4.41 oz |
| 250 g | 8.82 oz |
| 454 g | 16.01 oz |
| 500 g | 17.64 oz |
| 1,000 g | 35.27 oz |
A 1 kg bag is 35.27 oz, or 2 lb 3.27 oz. Above 16 oz a weight is usually easier to read in pounds, on kg to lbs.
Questions
How many ounces is 100 g?
3.53 oz, so a nutrition label's figures per 100 g are per 3.53 oz.
Why does my recipe say 1 oz is 25 g?
Some older British recipes round an ounce to 25 g to keep the sums simple. The proportions stay right, but everything comes out about 12% lighter. The real figure is 28.35 g.