Convert weight and mass units — kilograms, pounds, ounces, grams, tons, stones.
| Unit | Name | Value |
|---|---|---|
| kg | Kilogram | 0.0283495 |
| g | Gram | 28.3495 |
| mg | Milligram | 28349.5 |
| t | Metric Ton | 0.0000283495 |
| lb | Pound | 0.0625 |
| st | Stone | 0.0044642843 |
The Ounce (oz) and the Gram (g) are both units of weight & mass. Converting between them is straightforward using the formula above.
Formula: 1 oz = 28.3495 g
This converter uses internationally recognized conversion factors. All calculations are performed client-side in your browser — no data is sent to any server.
| Ounce (oz) | Gram (g) | Real-world context |
|---|---|---|
| 0.1 oz | 2.83495 g | |
| 1 oz | 28.3495 g | letter envelope |
| 5 oz | 141.7475 g | |
| 10 oz | 283.495 g | |
| 100 oz | 2834.95 g |
1 ounce (oz) equals exactly 28.3495 grams (g). Use the formula: oz × 28.3495 = g.
To convert ounces to grams, multiply your value in ounces by 28.3495. For example, 5 oz × 28.3495 = 141.7475 g.
100 ounces = 2834.95 grams. Calculation: 100 × 28.3495 = 2834.95.
To convert grams back to ounces, divide by 28.3495 (or multiply by 0.03527399). Example: 10 g ÷ 28.3495 = 0.35273991 oz.
Yes. This converter uses the internationally recognised exact conversion factor: 1 oz = 28.3495 g. All calculations are performed in your browser with no rounding until display.
10 ounces = 283.495 grams. Simply multiply by 28.3495.
Converting ounces to grams is commonly needed for everyday tasks like cooking recipes, body weight tracking, shopping internationally, or shipping parcels where one system uses oz and another uses g.
The avoirdupois ounce (oz) equals exactly 28.349523125 grams or 1/16 of an avoirdupois pound. It is widely used in the US and UK for food portions, product packaging, and everyday measurements. Note that the troy ounce (31.1035 g), used for precious metals like gold and silver, is a different and heavier unit than the avoirdupois ounce.
The gram (g) is a unit of mass in the metric system equal to one-thousandth of a kilogram (0.001 kg). While the kilogram is the SI base unit, the gram is the practical everyday unit for small masses in cooking, pharmacy, chemistry, and nutrition labelling. The word derives from Late Latin gramma (small weight), itself from Greek.
The word "ounce" derives from Latin uncia (a twelfth), originally 1/12 of the Roman pound. The avoirdupois ounce developed in medieval England specifically for the wool trade, creating a 16-ounce pound distinct from the Troy 12-ounce pound. The British Imperial system codified the ounce in 1824. The modern exact definition (28.349523125 g) was set by the 1959 International Yard and Pound Agreement.
Interesting fact: A troy ounce (31.1 g) used for gold is heavier than an avoirdupois ounce (28.35 g) used for food — so an "ounce" of gold contains more metal than an "ounce" of flour. A standard large hen's egg weighs approximately 56–63 grams (about 2 oz).
Defined in 1795 by the French Academy of Sciences as the mass of one cubic centimetre of pure water at 4 °C — this made 1 mL of water weigh almost exactly 1 gram. The gram was the practical base of early metric calculations before the kilogram took over as SI base unit in 1875. The relationship 1 mL water ≈ 1 g is still a useful approximation in cooking and chemistry.
Interesting fact: A standard large paperclip weighs about 1 gram. The gram forms the basis for milligram (mg), microgram (μg), and tonne (10⁶ g) through SI prefixes.