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Ounces to Grams

Convert ounces (oz) to grams (g) with a precise result, and see other mass units alongside.

What this tool does

Convert ounces (oz) to grams (g) with a precise result, and see other mass units alongside. Type an amount in ounces (avoirdupois), choose the units, and the tool converts it to grams. It offers 5 mass units and also shows the same amount in the others.

Inputs

  • Value: A number.
  • From: Choose one: Ounce (avoirdupois), Gram, Kilogram, Pound (avoirdupois), Milligram. Starts as Ounce (avoirdupois).
  • To: Choose one of the same 5 units as "From". Starts as Gram.

How to use

  1. Enter the amount you want to convert.
  2. Choose the unit to convert from and the unit to convert to.
  3. Read the result: the converted amount and the same amount in the other units. It appears once every required field has a valid value.

Worked examples

Conversions from ounces (avoirdupois) to grams:

  • 1 oz = 28.349523125 g
  • 5 oz = 141.747615625 g
  • 10 oz = 283.49523125 g
  • 50 oz = 1,417.47615625 g
  • 100 oz = 2,834.9523125 g

Multiply the number of ounces (avoirdupois) by 28.349523125 to get grams. Both units are exact definitions, so 28.349523125 is the exact factor: 1 oz = 28.349523125 g.

Sources: Ounce (avoirdupois): exact by definition. Gram: SI Brochure, 9th edition (2019).

Limitations

  • Converts mass units only. It does not convert between mass and volume or energy, which needs a density or other second value.
  • Weight only, not fluid ounces.

FAQs

Q: How many grams is one ounce?
A: One ounce is 28.349523125 grams.
Q: Which ounce is used?
A: The ounce here is the avoirdupois ounce (the everyday ounce), not the troy ounce.

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