Ounces to Grams Converter
Instantly convert ounces to grams and vice versa. The perfect tool for cooking, baking, shipping, and scientific measurements requiring precise weight conversions.
Convert Weight Units
Enter your weight value and select the starting unit below to instantly see the equivalent weight in grams, ounces, and other common units.
Weight Converter
Get instant, precise conversions for all your measurement needs.
Understanding Weight Units
Key facts about metric and imperial weight measurements
The Exact Conversion
The foundation of this conversion is the exact value: 1 ounce = 28.349523125 grams. This was internationally standardised to ensure uniformity across scientific and commercial fields.
Avoirdupois vs. Troy
The standard “avoirdupois” ounce (28.35g) is used for everyday items like food. The “troy” ounce (31.10g) is heavier and is exclusively used for measuring precious metals like gold and silver.
Metric vs. Imperial
The metric system (grams, kilograms) is decimal-based and used globally for its simplicity. The imperial system (ounces, pounds) remains standard in the US and is still widely used in the UK for specific applications like postal weights and some recipes.
Common Use Cases
Accurate oz-to-g conversion is essential in culinary arts (baking, coffee brewing), international shipping and postage, nutritional labelling, and scientific laboratory work.
Common Conversions
A handy lookup table for frequently converted ounce and gram measurements.
| Ounces (oz) | Grams (g) | Fractional / Context | Common Use |
|---|---|---|---|
| 28.35 g | 1 oz | Single serving of nuts, cheese, or chocolate | |
| 56.70 g | 1/8 lb | Small portion of meat or butter | |
| 113.40 g | 1/4 lb | Standard hamburger patty, quarter pound | |
| 226.80 g | 1/2 lb | Half pound of ground meat, block of butter | |
| 340.19 g | 3/4 lb | Standard loaf of bread, large steak | |
| 453.59 g | 1 lb | One pound (standard imperial weight unit) | |
| 907.18 g | 2 lb | Large bag of flour or sugar | |
| 1,000.00 g | ~2.2 lbs | Exactly 1 Kilogram |
Conversion FAQ
Answers to the most frequently asked questions about converting between ounces and grams.
To convert ounces to grams, multiply the weight in ounces by 28.3495. For example, 5 oz × 28.3495 = 141.75 grams. This calculator handles the math for you instantly.
There are exactly 28.349523125 grams in one international avoirdupois ounce. For most everyday purposes, such as cooking or shipping, this is safely rounded to 28.35 grams.
A standard (avoirdupois) ounce weighs 28.35 grams and is used for everyday items like food and mail. A troy ounce weighs 31.1035 grams and is exclusively used for measuring precious metals like gold, silver, and platinum.
Weight measurements (grams) are significantly more accurate and consistent than volume measurements (cups) or imperial weight (ounces). Using a digital kitchen scale in grams ensures precise ingredient ratios, which is critical for successful baking chemistry.
To convert grams to ounces, divide the weight in grams by 28.3495. For example, 100 grams ÷ 28.3495 = 3.527 ounces. You can also use the dropdown in our calculator to reverse the conversion instantly.