Grams to Ounces Converter
Convert grams to ounces, or ounces to grams, with pounds, kilograms and troy ounces for precious metals.
Results
| Item | Value |
|---|
Quick Answer
Divide grams by 28.3495 to get ounces. 1 g is 0.03527 oz, 100 g is 3.527 oz, 250 g is 8.818 oz and 500 g is 17.637 oz. To turn ounces into grams, multiply by 28.3495: 1 oz is 28.35 g, 4 oz is 113.4 g and 16 oz (1 lb) is 453.6 g.
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Table of Contents
- Grams to Ounces Converter
- Quick Answer
- Related Calculators
- How This Grams to Ounces Converter Works
- How to Use the Grams to Ounces Converter
- Grams to Ounces Formulas
- Key Terms
- Worked Example
- Real-Life Examples
- Ounce vs Troy Ounce
- Grams to Ounces Chart
- Avoirdupois, Troy and Fluid Ounces
- Common Mistakes to Avoid
- Frequently Asked Questions
- References & Sources
How This Grams to Ounces Converter Works
Recipes, food labels, postage, jewelry and lab work switch between grams and ounces all the time. Choose the direction, enter the weight and press Calculate. The converter gives ounces to three decimal places (or grams to two), plus pounds, kilograms and troy ounces, and shows the formula it used.
Quick explanation: an ounce is a little over 28 grams.
- g to oz: divide by 28.3495 (or multiply by 0.035274).
- oz to g: multiply by 28.3495.
- Mental math: 100 g is about 3.5 oz, and 30 g is about 1 oz.
How to Use the Grams to Ounces Converter
- Choose grams to ounces or ounces to grams.
- Enter the weight.
- Press Calculate.
- Read the converted weight, plus pounds, troy ounces and kilograms.
Grams to Ounces Formulas
- Definition: 1 ounce (oz) = 28.349523125 grams exactly
- Ounces from grams: oz = g ÷ 28.349523125 = g × 0.0352740
- Grams from ounces: g = oz × 28.349523125
- Pounds: 16 oz = 1 lb = 453.59237 g
- Troy ounce: 1 oz t = 31.1034768 g, used for gold, silver and platinum
Key Terms
- Gram (g): one thousandth of a kilogram.
- Ounce (oz): the avoirdupois ounce, 28.349523125 g.
- Troy ounce (oz t): 31.1034768 g, used for precious metals.
- Pound (lb): 16 ounces, 453.59237 g.
- Fluid ounce (fl oz): a unit of volume, not weight.
Worked Example
A European recipe calls for 250 g of butter. How many ounces is that?
- 250 ÷ 28.349523125 = 8.818 oz
- In pounds: 8.818 ÷ 16 = 0.551 lb, a little over half a pound
- A US stick of butter is 4 oz (113.4 g), so 250 g is just over 2 sticks.
Going the other way, a 6 oz steak weighs 6 × 28.3495 = 170.1 g.
Real-Life Examples
- Cooking: 125 g of flour is 4.41 oz.
- Nutrition labels: a 30 g serving is 1.06 oz.
- Postage: a 1 oz letter limit is 28.35 g.
- Coffee: 18 g of beans is 0.63 oz.
Ounce vs Troy Ounce
- Ounce (oz): 28.3495 g; 16 make a pound.
- Troy ounce (oz t): 31.1035 g; used for gold and silver.
- Difference: a troy ounce is 1.0971 ordinary ounces, about 9.7% heavier.
Grams to Ounces Chart
Exact factors: 1 oz = 28.349523125 g; 1 oz t = 31.1034768 g.
| Grams | Ounces | Troy ounces |
|---|---|---|
| 1 g | 0.035 oz | 0.032 oz t |
| 5 g | 0.176 oz | 0.161 oz t |
| 10 g | 0.353 oz | 0.322 oz t |
| 25 g | 0.882 oz | 0.804 oz t |
| 28.35 g | 1.000 oz | 0.911 oz t |
| 50 g | 1.764 oz | 1.608 oz t |
| 100 g | 3.527 oz | 3.215 oz t |
| 113 g | 3.986 oz | 3.633 oz t |
| 125 g | 4.409 oz | 4.019 oz t |
| 200 g | 7.055 oz | 6.430 oz t |
| 250 g | 8.818 oz | 8.038 oz t |
| 454 g | 16.014 oz | 14.596 oz t |
| 500 g | 17.637 oz | 16.075 oz t |
| 750 g | 26.455 oz | 24.113 oz t |
| 1000 g | 35.274 oz | 32.151 oz t |
Avoirdupois, Troy and Fluid Ounces
There are three common ounces, and mixing them up is the most frequent conversion mistake. The avoirdupois ounce (28.35 g) is the everyday ounce for food, people, parcels and almost everything sold by weight in the US. The troy ounce (31.10 g) is used only for precious metals and is about 10% heavier, so 1 kg of gold is 32.15 troy ounces but 35.27 ordinary ounces. The fluid ounce measures volume, not weight; 1 US fl oz of water weighs about 29.6 g, close to but not the same as an ounce.
Because the ounce is defined from the pound, and the pound has been exactly 0.45359237 kg since 1959, the conversion is exact. Kitchen scales usually round to the nearest gram or the nearest 0.05 oz, so a scale switched between units can show answers that differ in the last digit.
Common Mistakes to Avoid
- Using fluid ounces for weight. 8 fl oz of honey weighs far more than 8 oz.
- Using troy ounces for food. Troy is only for precious metals.
- Rounding to 30 g. 16 oz would come out 26 g too heavy.
- Dividing when you should multiply. Ounces become a bigger number in grams.
- Reading 3.5 oz as 3 oz 5. 0.5 oz is half an ounce.
Frequently Asked Questions
One ounce is 28.349523125 grams, about 28.35 g.
Divide grams by 28.3495.
100 g is 3.527 oz.
1 g is 0.03527 oz.
4 oz is 113.40 g.
8 oz is 226.80 g.
500 g is 17.637 oz, about 1.1 lb.
No. A troy ounce is 31.10 g; an ordinary ounce is 28.35 g.
16 oz is 453.59 g, one pound.
References & Sources
| Source | Used For | Link |
|---|---|---|
| NIST, Guide to the SI, Appendix B.8 | Ounce (avoirdupois) = 28.34952 g; ounce (troy) = 31.10348 g. | https://www.nist.gov/pml/special-publication-811/nist-guide-si-appendix-b-conversion-factors/nist-guide-si-appendix-b8 |
| NIST Handbook 44, Appendix C: General Tables of Units of Measurement | Avoirdupois and troy units of mass. | https://www.nist.gov/pml/owm/nist-handbook-44-current-edition |