Ounces to Grams Converter
Convert ounces to grams instantly with our free online calculator. Essential for cooking, baking, nutrition tracking, jewelry, and international recipe conversions.
Conversion Formula
| Conversion | Formula | Example |
|---|---|---|
| oz to grams | oz × 28.3495 | 4 oz = 113.4 g |
| grams to oz | g ÷ 28.3495 | 100 g = 3.53 oz |
Quick Reference Table
| Ounces | Grams | Common Use |
|---|---|---|
| 0.5 oz | 14.17 g | Small portion |
| 1 oz | 28.35 g | Standard serving |
| 2 oz | 56.70 g | Pasta serving |
| 4 oz | 113.40 g | Quarter pound |
| 6 oz | 170.10 g | Steak portion |
| 8 oz | 226.80 g | Half pound |
| 12 oz | 340.19 g | Three-quarter pound |
| 16 oz | 453.59 g | One pound |
Cooking Measurements
| Ingredient | US (oz) | Metric (g) |
|---|---|---|
| Flour (1 cup) | 4.25 oz | 120 g |
| Sugar (1 cup) | 7 oz | 200 g |
| Butter (1 stick) | 4 oz | 113 g |
| Chocolate chips (1 cup) | 6 oz | 170 g |
| Rice (1 cup dry) | 6.5 oz | 185 g |
| Cheese (1 cup shredded) | 4 oz | 113 g |
Baking Conversions
| US Recipe | Metric |
|---|---|
| 2 oz butter | 57 g |
| 4 oz flour | 113 g |
| 6 oz sugar | 170 g |
| 8 oz cream cheese | 227 g |
| 12 oz chocolate | 340 g |
Conversion Code Example
``javascript
function ouncesToGrams(oz) {
return oz * 28.3495;
}
function gramsToOunces(g) {
return g / 28.3495;
}
// Examples
console.log(ouncesToGrams(4)); // 113.398
console.log(gramsToOunces(100)); // 3.527
``
Troy Ounces (Precious Metals)
For gold, silver, and precious metals:
| Troy oz | Grams | Avoirdupois oz |
|---|---|---|
| 1 troy oz | 31.1035 g | 1.097 oz |
Nutrition Labels
Food labels typically show:
| Serving | Common Sizes |
|---|---|
| 1 oz (28g) | Chips, crackers, cereal |
| 2 oz (56g) | Dried pasta |
| 3 oz (85g) | Cooked meat, fish |
| 4 oz (113g) | Standard protein portion |
Jewelry & Gold
| Weight | Grams |
|---|---|
| 1/4 oz | 7.09 g |
| 1/2 oz | 14.17 g |
| 1 oz | 28.35 g |
| 1 troy oz | 31.10 g |
How Many Decimals Do You Need?
Rounding the factor costs accuracy, and how much depends on the factor. Converting 137 oz with the factor truncated at each decimal place:
| Decimals kept | Factor | 137 oz becomes | Error |
|---|---|---|---|
| 0 | 28 | 3,836 | 1.2329% |
| 1 | 28.3 | 3,877.1 | 0.1747% |
| 2 | 28.35 | 3,883.95 | 0.0017% |
| 3 | 28.35 | 3,883.95 | 0.0017% |
| 4 | 28.3495 | 3,883.88 | — |
The right number of significant figures is set by your input, not by the converter. If you measured ounces to three significant figures, the answer in grams is only good to three — writing more digits claims precision the measurement never had.