Multiply ounces by 28.3495 to get grams. U.S. recipes, coffee doses and postage weights are often in ounces.
How to use the Ounces to Grams Converter
- Type the number of ounces into the Ounces field. Decimals such as 0.5 are fine.
- Read the answer in Grams – it updates as you type, with no button to press.
- To convert the other way, type into Grams and the ounces are recalculated.
- Press Copy results to copy both values with the page title, or Copy link to share this exact conversion.
This page converts only oz ⇄ g. Need a different unit? Use the general weight converter, where you can choose any “from” and “to” unit.
How it works
Both units measure weight, so they are always in the same ratio: one ounce equals 28.349523 grams. The calculator multiplies the number of ounces you type by 28.349523 to give grams, and when you type into the grams field it divides by the same factor to give ounces. Because the ratio never changes, doubling the ounces always doubles the grams. Results are calculated at full precision and rounded only for display (up to eight decimal places, with very large or small values shown in scientific notation).
How to convert ounces to grams
- Write down the value in ounces, for example 1 oz.
- Multiply by the conversion factor 28.349523 (because 1 ounce = 28.349523 g).
- 1 × 28.349523 = 28.349523 g.
- To go back from grams to ounces, divide by 28.349523 – or multiply by 0.035273962.
oz to g conversion table
| Ounces | Grams | Grams | Ounces |
|---|---|---|---|
| 0.5 oz | 14.174762 g | 1 g | 0.035273962 oz |
| 1 oz | 28.349523 g | 2 g | 0.070547924 oz |
| 2 oz | 56.699046 g | 5 g | 0.17636981 oz |
| 3 oz | 85.048569 g | 10 g | 0.35273962 oz |
| 4 oz | 113.39809 g | 20 g | 0.70547924 oz |
| 6 oz | 170.09714 g | 50 g | 1.7636981 oz |
| 8 oz | 226.79619 g | 100 g | 3.5273962 oz |
| 10 oz | 283.49523 g | 1,000 g | 35.273962 oz |
| 12 oz | 340.19428 g | ||
| 16 oz | 453.59237 g | ||
| 32 oz | 907.18474 g |
What is an ounce?
The avoirdupois ounce is 1/16 of a pound, exactly 28.349523125 g. It is used for food, postage and parcels. Do not confuse it with the fluid ounce (volume) or the troy ounce (precious metals).
What is a gram?
A gram is one thousandth of a kilogram. Recipes, nutrition labels, postage and jewellery weights use grams in metric countries.
Quick mental conversion
For a fast estimate, multiply ounces by about 28 to get grams; the error is about 1.2%. Use the calculator above when you need the exact figure.
Common mistakes to avoid
Confusing fluid ounces (volume) with ounces (weight), using troy ounces for food or regular ounces for gold, and mixing u.s. short tons, uk long tons and metric tonnes.
Formula
1 oz = 28.349523 g1 g = 0.035273962 ozg = oz × 28.349523Worked example
Inputs — Ounces: 1 oz.
Results — Grams = 28.34952313 g.
Frequently asked questions
How many grams in an ounce?
About 28.35 g.
How many grams is 8 oz?
About 226.8 g.
How do I convert ounces to grams?
Multiply the number of ounces by 28.349523. For example, 1 oz × 28.349523 = 28.349523 g.
How do I convert grams back to ounces?
Divide by 28.349523 (or multiply by 0.035273962), or simply type the value into the grams field above.
What is 10 oz in grams?
10 oz = 283.49523 g.
What is 2 oz in grams?
2 oz = 56.699046 g.
Is this conversion exact?
Yes. The factor comes from the official definitions of both units (NIST and the SI), so the only difference you may see is rounding in the last displayed digit.
Can I convert to other units on this page?
This page converts only between ounces and grams. To pick any weight unit, use the general weight converter linked under Related calculators.
What formula does the Ounces to Grams Converter use?
1 oz = 28.349523 g.