Ounces to Grams (oz to g) Calculator

Created by: Natalie Reed
Last updated:
Convert weight from ounces (oz) to grams (g) and vice versa. Ideal for cooking, shipping, and scientific applications requiring accurate weight conversions.
What is an Ounces to Grams Calculator?
An Ounces to Grams (oz to g) Calculator is a tool used to convert measurements of weight or mass from avoirdupois ounces to grams. This is a common conversion needed in cooking, shipping, science, and various other fields where ingredients or materials are measured by weight.
Understanding this conversion is vital for accuracy, especially when dealing with recipes from different regions (e.g., US customary vs. metric systems) or when precision is critical in scientific or industrial applications.
Ounces to Grams Conversion Formulas
The conversion is based on the standard avoirdupois ounce:
- Ounces to Grams:
Grams = Ounces × 28.349523125
- Grams to Ounces:
Ounces = Grams / 28.349523125
Where:
- oz stands for avoirdupois ounce(s)
- g stands for gram(s)
How to Convert Ounces to Grams: Example
Imagine you have a food item that weighs 5 ounces (oz).
- Identify the value in ounces: 5 oz
- Apply the conversion formula (oz to g): Grams = 5 × 28.349523125
- Calculate: Grams ≈ 141.75 g
So, 5 ounces is approximately 141.75 grams.
Conversely, if a recipe calls for 200 grams of an ingredient:
- Identify the value in grams: 200 g
- Apply the conversion formula (g to oz): Ounces = 200 / 28.349523125
- Calculate: Ounces ≈ 7.05 oz
So, 200 grams is approximately 7.05 ounces.
Common Applications
This conversion is frequently used in:
- Cooking and Baking: Converting recipe ingredients between metric and imperial systems.
- Postage and Shipping: Calculating package weights for shipping costs.
- Grocery Shopping: Comparing product weights and prices.
- Science and Laboratories: Measuring chemicals and substances.
- Jewelry and Precious Metals: Troy ounces are different, but general weight conversions can be useful. (Note: This calculator is for avoirdupois ounces).
Sources and References
- National Institute of Standards and Technology (NIST). (n.d.). *Weights and Measures History*. (General reference for US customary units, including the avoirdupois ounce).
- International Bureau of Weights and Measures (BIPM). (2019). *The International System of Units (SI)*, 9th edition. (For definition of the gram).
- Butcher, K., & Crown, L. (2008). *NIST Handbook 44: Specifications, Tolerances, and Other Technical Requirements for Weighing and Measuring Devices*. NIST.