Ounces to Grams Converter

What are ounces (oz)?

The ounce is a unit of weight in both the imperial and US customary systems. The abbreviated notation for ounce is oz. One ounce equals approximately 28.3495 grams or 0.0283495 kilograms.

There are 16 ounces in one pound (lb), making the ounce a smaller unit of weight measurement commonly used for measuring lighter items such as food ingredients, postal packages, and precious metals.

What is a Gram (g)?

A gram (symbol: g) is a metric unit of mass equal to one thousandth of a kilogram (1 g = 0.001 kg). The gram is the base unit of mass in the centimeter-gram-second (CGS) system of units and is widely used worldwide for measuring small quantities of mass. It is defined in terms of the kilogram, which is based on fundamental physical constants.

How do you convert ounces (oz) to grams (g)?

The Conversion Formula

To convert ounces to grams, multiply the number of ounces by 28.3495:
Formula: Grams = Ounces × 28.3495

Step-by-Step Process

• Take your weight in ounces
• Multiply by 28.3495
• The result is your weight in grams

Examples

• 1 oz to g:
  1 oz × 28.3495 = 28.3495 g
• 4 oz to g:
  4 oz × 28.3495 = 113.398 g
• 8 oz to g:
  8 oz × 28.3495 = 226.796 g
• 16 oz to g:
  16 oz × 28.3495 = 453.592 g
• 32 oz to g:
  32 oz × 28.3495 = 907.184 g

Quick Reference

• 1 oz = 28.3495 g
• 1 g = 0.035274 oz
• 16 oz (1 lb) = 453.592 g

Why This Conversion Works

The conversion factor 28.3495 is the exact number of grams in one ounce. This is a standard relationship in both the imperial and US customary systems. Since one ounce equals 28.3495 grams, multiplying ounces by 28.3495 gives us the equivalent weight in grams.

Tips for Mental Math

For quick estimates, you can use 28.35 as an approximation:

1 oz ≈ 28.35 g
4 oz ≈ 113.4 g (4 × 28.35)
8 oz ≈ 226.8 g (8 × 28.35)
16 oz ≈ 453.6 g (16 × 28.35)

This method is perfect for everyday use and provides results accurate enough for most purposes, especially when working with food recipes and package weights.

Ounces to Grams Conversion Table

The conversion of ounces to grams for certain values are provided below: