# How Many Grams in an Ounce

> Convert between ounces and grams instantly. Understand the differences between standard avoirdupois ounces and troy ounces, and use our reference tables.

**URL:** https://www.calculatoranswers.com/how-many-grams-in-an-ounce
**Category:** Conversions

## Quick Answer

Find out exactly how many grams are in a standard ounce (28.35 grams) or a precious metal troy ounce (31.10 grams).

## Definition

A grams-in-an-ounce page converts weight metrics between imperial ounces and metric grams. In the standard Avoirdupois system, 1 ounce equals exactly 28.3495 grams. In the Troy system, used for gold and silver, 1 ounce equals exactly 31.1035 grams. The page assists with cooking, food labeling, and bullion weight conversions.

## How to Use

1. **Choose ounce standard** — Select Avoirdupois (standard) or Troy (precious metals) standard.
2. **Type weight value** — Enter the number of ounces or grams to execute the bidirectional conversion.
3. **Read equivalent weights** — View the converted mass instantly and review common grocery-weight charts.

## Disclaimer

This calculator provides estimates for educational and planning purposes. Always consult a qualified professional for specific advice on financial, medical, legal, or other regulated decisions.

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