Ounces to Grams Converter

About the Ounces to Grams Converter

Convert ounces to grams with precision: 1 avoirdupois ounce = 28.3495 grams. This converter handles any amount and shows results in grams, kilograms, and pounds for complete context.

Ounce-to-gram conversion is essential for cooking with international recipes, weighing postal items, measuring jewelry and precious metals, and scientific work. American recipes often use ounces for ingredients that international recipes measure in grams.

Note: this calculator uses the avoirdupois ounce (28.3495 g), the standard for everyday weight. Troy ounces (31.1035 g), used for precious metals, are a different unit. The calculator also shows troy ounce equivalents so you can identify which type you need.

When This Page Helps

Ounce-to-gram conversion is needed for cooking, shipping, lab work, and precious metal valuation. Using the exact factor prevents errors that matter when precision counts.

How to Use the Inputs

1. Enter the weight in ounces.
2. The gram equivalent appears in the output panel.
3. Additional conversions to kilograms and pounds are shown.
4. Use decimal values for fractional ounces.
5. Check the troy ounce equivalent if working with precious metals.

Example Calculation

Tips & Best Practices

• Quick estimate: 1 oz ≈ 28 g. Multiply ounces by 28 for a fast approximation.
• Food labels in the US show both ounces and grams — check the label to verify your conversion.
• Troy ounces (gold, silver) are heavier: 1 troy oz = 31.1 g vs. 1 regular oz = 28.3 g.
• Postal scales: 1 oz is the first-class letter rate threshold; letters over 1 oz need additional postage.
• For cooking: 4 oz of cheese = about 113 g (roughly 1 cup shredded).

Ounces in Everyday Life

Ounces are used extensively in the US for food packaging, postage, and cooking. A typical serving of meat is 3–4 oz (85–113 g), a can of soda is 12 fl oz, and postal rates change at 1 oz increments.

Precious Metals and Troy Ounces

Gold, silver, platinum, and palladium are priced per troy ounce (31.1035 g), not the regular ounce. When you see "gold at $2,000 per ounce," it means troy ounces. This distinction matters for investors and jewelers.

Cooking with Ounces and Grams

Many modern recipes include both ounces and grams. Professional kitchens use grams for precision. When converting family recipes that use ounces, switch to grams for more consistent results, especially in baking.

Frequently Asked Questions

• How many grams is 1 ounce?

  One avoirdupois ounce equals 28.3495 grams (exactly 28.349523125 g). This is the standard ounce used for everyday weight measurement in the US and UK.

• What is the difference between an ounce and a troy ounce?

  An avoirdupois ounce (28.3495 g) is used for general weight measurement. A troy ounce (31.1035 g) is used for precious metals like gold and silver. Troy ounces are about 10% heavier than regular ounces.

• How do I convert grams to ounces?

  Divide grams by 28.3495. For example, 100 g / 28.3495 = 3.527 ounces. This converts to avoirdupois ounces, the standard everyday ounce.

• Is a fluid ounce the same as an ounce?

  No. A fluid ounce (fl oz) measures volume (29.5735 mL), while an ounce (oz) measures weight (28.3495 g). They have similar names but measure different physical quantities. For water, 1 fl oz weighs approximately 1 oz, but this is a coincidence.

• How many ounces in a pound?

  There are 16 avoirdupois ounces in one pound. So 1 pound = 16 oz = 453.592 grams. Half a pound is 8 oz = 226.8 g.

• What is 100 grams in ounces?

  100 grams equals 3.527 ounces. This is a common package size in international food products and is slightly less than 4 ounces.