Convert Ounces to Grams

Instantly convert ounces (oz) to grams (g). Enter a value to see the result and the conversion formula.

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How our Ounces to Grams unit converter works

To ensure maximum accuracy when converting Ounces to Grams, our calculator uses a scientific pivot method. Instead of relying on a potentially inaccurate direct conversion, the system first converts oz into the base unit of the International System (the kilogram), then recalculates the result into g. This approach drastically reduces rounding errors.

About this conversion

Converting ounces to grams provides greater precision, especially in chemistry, nutrition, and specialty coffee brewing where the metric system dominates.

When to use this conversion

Use this to portion out coffee beans with precision for espresso, or to understand the exact nutritional value of imported US food products.

Formula

Grams (g) = Ounces (oz) × 28.3495

Tip: You can swap units and convert decimals. Results are rounded for readability.

Examples

Ounces (oz) Grams (g)
1 oz 28.3495 g
2 oz 56.699 g
5 oz 141.7475 g
10 oz 283.495 g
20 oz 566.99 g
50 oz 1417.475 g
100 oz 2834.95 g
250 oz 7087.375 g
500 oz 14174.75 g
1000 oz 28349.5 g

FAQ

How do I measure an ounce of flour without a scale?

It's tricky because volume varies. One ounce of all-purpose flour is roughly equivalent to 28.3 grams, or about 4 tablespoons.

Why is cannabis sold in ounces and grams?

North American culture traditionally priced herbs in ounces (and fractions like 1/8th of an ounce), which translates to about 3.5 grams.