oz to gram calculator

What this oz to gram calculator does

This calculator converts ounces to grams using the exact conversion factor: 1 ounce = 28.349523125 grams. It is useful for cooking, baking, nutrition tracking, shipping, and any task where you need a quick ounces-to-grams conversion.

Ounces to grams formula

To convert oz to g manually, use:

grams = ounces × 28.349523125

Example: If you have 4 oz, then:

4 × 28.349523125 = 113.3980925 g (about 113.40 g)

Common oz to gram conversions

Ounces (oz)	Grams (g)
0.5 oz	14.17 g
1 oz	28.35 g
2 oz	56.70 g
3 oz	85.05 g
4 oz	113.40 g
5 oz	141.75 g
8 oz	226.80 g
10 oz	283.50 g
16 oz	453.59 g

When to use ounces vs grams

In US recipes

Many US recipes list ingredients in ounces. If your kitchen scale is metric, convert those values to grams for better measuring precision.

In nutrition and meal prep

Food labels and diet plans often use grams. Converting ounces to grams helps keep your tracking consistent.

In shipping and product weights

Some carriers use ounces, while international systems often use grams or kilograms. Quick conversions help avoid errors and overcharges.

Important note: ounce (weight) vs fluid ounce (volume)

This calculator is for ounces of weight (mass), not fluid ounces. A fluid ounce measures volume, so converting fluid ounces to grams depends on the substance (water, milk, oil, etc.).

Tips for accurate conversions

• Use a digital scale and tare it before measuring.
• Keep at least 1–2 decimal places for baking accuracy.
• Round only at the end of your calculation.
• Double-check whether your recipe means oz (weight) or fl oz (volume).

Frequently asked questions

How many grams are in 1 oz?

There are exactly 28.349523125 grams in 1 ounce.

How many grams is 8 oz?

8 oz equals 226.796185 g, usually rounded to 226.8 g.

How do I convert oz to grams quickly?

Multiply ounces by 28.35 for a fast estimate, or use this calculator for a more exact result.