Grams ↔ Ounces Converter

Fast, precise grams to ounces and ounces to grams, including troy ounces.

Enter a value in only one field, then click Calculate.

Inputs

Grams

Ounces

oz = avoirdupois ounce. ozt = troy ounce.

Results

Equivalent in grams

Equivalent in ounces

Step-by-step derivation

Enter a value in either box, then click Calculate.

References

1 international avoirdupois ounce = 28.349523125 g.
1 troy ounce = 31.1034768 g.
Scientific notation is used only for very small or very large values.

Use this Grams to Ounces Calculator to convert between milligrams, grams, kilograms, avoirdupois ounces, and troy ounces.

Conversion Method

For the standard everyday avoirdupois ounce:

1 oz = 28.349523125 g

Ounces = grams ÷ 28.349523125

Grams = ounces × 28.349523125

For troy ounces:

1 ozt = 31.1034768 g

Example

Convert 500 grams to standard ounces:

500 ÷ 28.349523125 ≈ 17.64 oz

Important Note

The standard ounce (oz) and troy ounce (ozt) are different units. Troy ounces are commonly used for precious metals.

This calculator converts mass, not fluid volume. Grams cannot be converted directly to fluid ounces without knowing the substance’s density.

Source

NIST Handbook 133 — General Tables of Units of Measurement

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