Grams to ounces
Multiply grams by 0.035274 to get ounces.
150 g = 5.2911 oz
How to convert grams to ounces
The ounce is one sixteenth of an avoirdupois pound, exactly 28.349523125 grams. The gram is one thousandth of a kilogram (10⁻³ kg) in the SI.
Worked example — 150 g: 150 × 0.035274 = 5.2911 oz.
Grams to ounces table
| Grams | Ounces |
|---|---|
| 10 g | 0.35274 oz |
| 25 g | 0.881849 oz |
| 50 g | 1.7637 oz |
| 100 g | 3.5274 oz |
| 150 g | 5.2911 oz |
| 200 g | 7.0548 oz |
| 250 g | 8.8185 oz |
| 500 g | 17.637 oz |
| 1,000 g | 35.274 oz |
Reverse and related
About grams and ounces
Gram (g)
1 g = 0.035274 ozDefinition. One thousandth of a kilogram (10⁻³ kg) in the SI
History and origin
The gram was the original base of the metric system set out in 1795, defined as the mass of one cubic centimetre of water at the melting point of ice, before the larger kilogram was chosen as the SI base unit. It is now simply one thousandth of a kilogram.
Current use
Grams are the everyday metric unit for small masses: recipe ingredients, nutrition labels, medicine doses and postage.
Source: BIPM, The International System of Units (SI), 9th ed. (2019)
Ounce (oz)
1 oz = 28.3495 gDefinition. One sixteenth of an avoirdupois pound, exactly 28.349523125 grams
History and origin
The ounce comes from the Roman uncia, a twelfth of the libra; the modern avoirdupois ounce is instead one sixteenth of the pound. Through the 1959 agreement it works out to exactly 28.349523125 grams.
Current use
Ounces are used in the United States for food portions, packaged goods and letter mail, and worldwide for boxing weights and some recipes.
Source: NIST Handbook 44, Appendix C §5 (Tables of Equivalents)
Where people use this
Grams: recipe and food weights, nutrition labels, postage. Ounces: recipe portions, letter mail, packaged food. A 250 g block of butter is about 8.8 oz.
Every value is carried to full double precision; the display is rounded.
Sources: NIST Handbook 44, Appendix C §5 (Tables of Equivalents); BIPM, The International System of Units (SI), 9th ed. (2019).
Questions people ask
How many ounces is 100 grams?
100 grams is about 3.53 ounces (100 × 0.035274). To convert grams to ounces, multiply by 0.035274 or divide by 28.35.
How many grams are in an ounce?
One avoirdupois ounce is exactly 28.3495 grams. Many recipes round it to 28 g.
Is 250 g the same as 8 oz?
Not quite: a 250 g block is about 8.8 oz, while 8 oz is 226.8 g. The half-pound and 250 g are close but not equal.
How many ounces is 500 grams?
500 grams is about 17.6 ounces, a little over one pound.