Need to convert ounces to grams? Our free online converter makes it easy to switch between imperial and metric weight units instantly. Whether you are following a US recipe using European measurements, calculating shipping weights for international packages, baking with precise ingredients, or working with precious metals, this tool provides accurate conversions. Simply enter a weight in ounces and see the gram equivalent immediately. Supports both US customary ounces and troy ounces for gold/silver. No signup required, works on all devices, and completely free.
Ounces and grams are units of weight used in different measurement systems. The US customary ounce (also called avoirdupois ounce) equals 28.3495 grams and is used for everyday weight measurements like food, body weight, and shipping. The troy ounce equals 31.1035 grams and is used specifically for weighing precious metals like gold, silver, and platinum. The gram is the metric unit of weight equal to one thousandth of a kilogram, used globally as the standard for scientific and most commercial purposes. Our converter helps you navigate between these systems, whether you are converting recipe measurements, calculating postal rates, or working with jewelry.
Dual Ounce Support - Convert US customary ounces (28.35 g) and troy ounces (31.10 g). Instant Conversion - Results appear as you type with no waiting. Bidirectional - Works both ways: ounces to grams and grams to ounces. High Precision - Accurate to multiple decimal places. Reference Tables - Common cooking and shipping conversions included. Mobile Friendly - Use on any device, anywhere. No Signup - Free unlimited conversions. Copy Function - Easy clipboard copying for recipes and shipping.
Enter a weight in ounces in the input field. Select the appropriate ounce type (US customary for most uses, Troy for precious metals) if applicable. The converter instantly calculates gram equivalents using these exact factors: US ounces: multiply by 28.3495, Troy ounces: multiply by 31.1035. Results appear instantly and include grams and kilograms for convenience. For reverse conversions, simply enter grams to see ounces. The tool uses internationally standardized conversion factors for accurate results every time.
Cooking and Baking - Converting US recipe measurements to metric for international cooking or precise baking. Common needs include converting butter (4 oz = 113 g), flour (5 oz = 142 g), and chocolate (6 oz = 170 g). Shipping and Postal - Calculating international shipping weights where carriers require metric units. Important for packages near weight thresholds where precise conversion affects shipping rates. Jewelry and Precious Metals - Working with gold, silver, and platinum which use troy ounces. Essential for buying/selling jewelry or metals where valuation depends on precise weight. Fitness and Nutrition - Tracking food portions and body weight when apps or devices use different units. Useful for consistent tracking across different systems. Manufacturing - Converting product specifications between markets using different measurement standards.
Manual conversion between ounces and grams requires remembering the conversion factor (28.35) and performing calculations. Our dedicated converter eliminates errors by handling the math automatically. It provides: Accuracy - No calculation mistakes using exact conversion factors. Convenience - Instant results saving time in the kitchen or office. Dual Support - Both US and troy ounces in one tool. Flexibility - Convert in either direction as needed. Precision - Multiple decimal places for professional use. Accessibility - Works on any device without installation. Education - Learn the difference between ounce types.
Home Cooks and Bakers - Converting recipes between measurement systems. Professional Chefs - Precise ingredient measurements in commercial kitchens. Jewelry Makers - Working with precious metals that use troy ounces. Shippers and E-commerce Sellers - Calculating international shipping weights. Fitness Enthusiasts - Tracking nutrition and body weight across different apps. Students - Learning about measurement systems and conversions. Scientists - Converting lab measurements between systems. Travelers - Understanding weights in foreign countries. Anyone working with both imperial and metric weight measurements.
Simply enter a weight in ounces in the input field. Select US or troy ounce type if applicable. The gram conversion appears instantly. View reference tables for common values. Copy results using the copy button if needed. No setup required.
Know Your Ounce Type - US customary for food and everyday items, Troy for precious metals. Use Precision When Needed - 28.35 g for US ounces gives more accurate results than 28 g. Round for Practicality - Most cooking uses can round to whole grams. Check Context - Recipes and specifications should indicate which ounce type they use. For Baking - Weight is more accurate than volume; use grams when possible. Double-Check Critical Values - For shipping rates or precious metals, verify conversions on borderline weights.
This tool converts weight between ounces and grams only. It does not convert volume measurements (fluid ounces) which measure liquid capacity rather than weight. The converter provides mathematical conversions and does not account for factors like moisture content in ingredients or temperature effects on metal density.
To convert ounces to grams, multiply the number of ounces by 28.3495. The formula is: Grams = Ounces × 28.3495. For US customary ounces (most common): 1 oz = 28.3495 g, 2 oz = 56.70 g, 4 oz = 113.40 g, 8 oz = 226.80 g, 16 oz (1 lb) = 453.59 g. For practical cooking: Round to 28.35 g per ounce, Use 28 g for quick estimates. Examples: Recipe calls for 4 oz flour: 4 × 28.35 = 113.4 g, Shipping weight 12 oz: 12 × 28.35 = 340.2 g. Our converter does this automatically with high precision.
There are two types of ounces for different purposes: US Customary Ounce (oz): Also called avoirdupois ounce, Used for everyday weight (cooking, shipping, body weight), 1 US oz = 28.3495 grams, 16 US oz = 1 pound (453.59 g). Troy Ounce (oz t): Used for precious metals (gold, silver, platinum), 1 Troy oz = 31.1035 grams, 12 Troy oz = 1 Troy pound (373.24 g). Key differences: Troy ounce is heavier (about 10% more), Troy pound is lighter than US pound, Precious metals always use troy ounces, Food and everyday items use US ounces. Note: When someone says 'ounce' without specifying, they usually mean US/customary ounce.
Quick reference table: 1/8 oz = 3.54 g, 1/4 oz = 7.09 g, 1/2 oz = 14.17 g, 3/4 oz = 21.26 g, 1 oz = 28.35 g, 2 oz = 56.70 g, 3 oz = 85.05 g, 4 oz = 113.40 g (1/4 lb), 5 oz = 141.75 g, 6 oz = 170.10 g, 8 oz = 226.80 g (1/2 lb), 12 oz = 340.19 g (3/4 lb), 16 oz = 453.59 g (1 lb). Common cooking amounts: Butter: 4 oz stick = 113 g, Flour: 5 oz = 142 g, Sugar: 7 oz = 198 g, Chocolate: 6 oz = 170 g.
Historical and regional reasons: US recipes use ounces because the United States uses the imperial/customary system. Most American cookbooks and food packaging use ounces and pounds. International recipes use grams because most countries use the metric system. Professional baking often uses grams because metric units are more precise. Benefits of each: Ounces: Familiar to US cooks, Match food packaging, Easy divisions (1/4, 1/2, etc.). Grams: More precise for baking, Easier scaling of recipes, Standard worldwide. When converting: Most conversions round to nearest gram, Small differences (28g vs 28.35g) don't matter for cooking, Baking requires more precision than cooking. Our converter helps bridge both systems for international recipes.
Common ingredient conversions: Butter: 1/4 cup (2 oz) = 57 g, 1/2 cup (4 oz) = 113 g, 1 cup (8 oz) = 227 g. Flour: 1 cup (4.5 oz) = 128 g, 1/2 cup (2.25 oz) = 64 g. Sugar (granulated): 1 cup (7 oz) = 198 g, 1/2 cup (3.5 oz) = 99 g. Chocolate chips: 1 cup (6 oz) = 170 g. Nuts (chopped): 1 cup (4 oz) = 113 g. Liquid vs dry: Dry ingredients vary by density (fluffiness), Liquids are more consistent, Weight is more accurate than volume for dry ingredients. Pro tip: Use a kitchen scale in grams for most accurate baking, Converting volume (cups) to weight (grams) requires knowing the ingredient density.
Shipping considerations: US Postal Service and UPS use pounds and ounces for domestic shipping. International shipping often requires grams or kilograms. Conversion for shipping: Small packages: 1-16 oz, Medium: 1-5 lbs (16-80 oz), Large: 5+ lbs. Examples: Letter: 1 oz = 28.35 g, Small package: 8 oz = 227 g, Priority mail: 1 lb (16 oz) = 454 g, International shipment: 2.2 lbs = 1 kg = 1000 g. Shipping rates often use weight brackets, so precise conversion matters for borderline weights. International customs forms typically require metric units (grams or kilograms). Our converter helps you provide accurate weights for any shipping carrier.
Yes, this ounces to grams converter is completely free to use. No registration required, unlimited conversions, no hidden fees. Use it for cooking, baking, shipping, or any weight conversions as often as you need. The tool works instantly in your browser and supports both US customary ounces and troy ounces for precious metals.
Everyday items: Smartphone: 5-7 oz (140-200 g), Can of soda: 12 oz (340 g), Tennis ball: 2 oz (57 g), Apple: 6 oz (170 g), Slice of bread: 1 oz (28 g), Chicken breast: 6 oz (170 g). Precious metals: 1 oz gold coin: 1 troy oz = 31.1 g, Silver bar: 10 troy oz = 311 g, Platinum ring: 0.25 troy oz = 7.8 g. Baby items: Newborn: 5-8 lbs = 80-128 oz = 2.3-3.6 kg, Baby bottle: 4 oz (113 g), Diaper: 2 oz (57 g). Jewelry: Gold ring: 0.2 oz (6 g), Silver necklace: 0.5 oz (14 g), Diamond: 0.01 oz (0.3 g or 1.5 carats).
Understanding the weight system: 1 pound (lb) = 16 ounces = 453.59 grams, 1 kilogram (kg) = 1000 grams = 35.27 ounces, 1 ton (US) = 2000 lbs = 907,185 grams, 1 metric ton = 1000 kg = 35,274 ounces, 1 milligram (mg) = 0.001 grams = 0.000035 ounces, 1 microgram (μg) = 0.000001 grams. Conversion relationships: Ounces to pounds: divide by 16, Grams to kilograms: divide by 1000, Ounces to kilograms: multiply by 0.02835, Pounds to grams: multiply by 453.6. Our converter focuses on ounces to grams, but understanding these relationships helps with other conversions.