# Ounces to Grams Converter

URL: https://speedycalculator.com/calculators/conversion/ounces-to-grams/
Last updated: 2026-10-25

> Convert ounces (oz) to grams (g): 1 ounce = 28.349523 g, so multiply by 28.349523 or divide by 0.035273962. Both fields are editable, so you can also type in grams and get ounces back.

## Inputs

- Ounces (oz)

## Results

- Grams

## Formula

```
1 oz = 28.349523 g
1 g = 0.035273962 oz
g = oz × 28.349523
```

## Explanation

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

OuncesGramsGramsOunces0.5 oz14.174762 g1 g0.035273962 oz1 oz28.349523 g2 g0.070547924 oz2 oz56.699046 g5 g0.17636981 oz3 oz85.048569 g10 g0.35273962 oz4 oz113.39809 g20 g0.70547924 oz6 oz170.09714 g50 g1.7636981 oz8 oz226.79619 g100 g3.5273962 oz10 oz283.49523 g1,000 g35.273962 oz12 oz340.19428 g16 oz453.59237 g32 oz907.18474 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.

## Worked example

Inputs — Ounces: 1 oz.

Results — **Grams = 28.34952313 g**.

## FAQ

**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.


## Sources

- [NIST Special Publication 811 – Guide for the Use of the International System of Units](https://www.nist.gov/pml/special-publication-811)
- [NIST Handbook 44 Appendix C – General tables of units of measurement](https://www.nist.gov/pml/owm/nist-handbook-44-current-edition)