Ounces (oz) and Grams (g) are both units of weight. Converting between them is a routine task in cooking and US nutrition labels. This converter applies the exact conversion factor, shows the result instantly, and provides a quick-reference table so you can sanity-check the math at a glance.
Type a value above to see it converted in real time. Tap the swap button if you want to go in the opposite direction.
What is the Ounces to Grams conversion?
The conversion expresses any quantity measured in ounces as the equivalent quantity in grams, using a fixed mathematical relationship between the two units. Ounces comes from the Imperial system; Grams comes from the Metric system. The conversion factor between them was standardised internationally to avoid ambiguity.
One ounces is equal to 28.3495 grams. Multiply your value by that ratio (or use this calculator) to get the converted figure.
The Ounces to Grams formula
The formula above is the canonical relationship used in engineering, scientific, and everyday contexts. For weight pairs this calculator implements it with full floating-point precision and rounds only at the display step — so a result that looks like "283.495" is actually the precise calculation, not an approximation.
Worked example: convert 10 oz to g
- Start with the value: 10 oz.
- Apply the conversion: result = 10 × 28.3495.
- Result: 283.495 g.
Try other values in the input above — the table below shows the most common multipliers at a glance.
Quick reference table
| Ounces (oz) | Grams (g) |
|---|---|
| 1 | 28.35 |
| 2 | 56.699 |
| 5 | 141.748 |
| 10 | 283.495 |
| 25 | 708.738 |
| 50 | 1,417.475 |
| 100 | 2,834.95 |
| 250 | 7,087.375 |
| 500 | 14,174.75 |
| 1000 | 28,349.5 |
How to use this converter
- Pick a category — Length, Weight, or Temperature — using the pill selector at the top of the converter.
- Choose the source unit in the left dropdown and the target unit in the right dropdown.
- Type your value. The result updates instantly. The "1 oz = X g" ratio under the unit pickers gives you a quick sanity check.
- Swap or copy. Tap the arrow between the units to reverse the direction; tap the copy icon to save the result to your clipboard.
Common use cases
The Ounces to Grams conversion shows up most often in cooking and US nutrition labels. A few specific scenarios:
- Real-world reading. Datasheets, manuals, and labels often use the unit system of their country of origin — converting lets you reason about them in your preferred system.
- Engineering & construction. Building codes, tooling tolerances, and structural specs may mix metric and imperial units; a precise converter avoids costly mistakes.
- Education. Students working through homework, lab reports, or physics problems use exact factors like this one to verify their algebra.
- International shopping. Imported clothing, furniture, and equipment frequently list sizes in the opposite system — quickly converting clarifies whether something fits.
- Health and fitness. Weight tracking, recipe measurements, and fitness goals often need cross-system precision.
More about this conversion
Quick Guide: Change oz into g
If you work with hardware, logistics, or scientific papers, you’ve likely faced this conversion. Aligning oz to g values improves workflow when managing templates or automation.
With modern converters, you can skip the math — but it helps to understand what's going on behind the scenes for traceability and verification.
Example: Let’s say you have 25 oz. If 1 oz = Z g, then 25 × Z = result in g.
Related weight converters
- Grams to Ounces (reverse direction)
- Kilograms to Grams Converter
- Kilograms to Pounds Converter
- Kilograms to Ounces Converter
- Kilograms to Stones Converter
- Grams to Kilograms Converter
- Grams to Pounds Converter
- Grams to Ounces Converter
- Grams to Stones Converter
- All conversion calculators
The bottom line
Unit conversion is a small but high-stakes calculation — getting it wrong by a factor of 10 or 1.6 has consequences in engineering, medicine, navigation, and trade. The Ounces to Grams formula above is the internationally accepted standard; this converter implements it precisely. Bookmark the page if you find yourself doing this conversion often.