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Ounces to Grams

Converts a mass measured in avoirdupois ounces into grams using the standard conversion factor.

MathematicsUnit ConversionDaily Life

Ounces → Grams CalculatorWeight Conversion

g = oz × 28.3495
g = grams  ·  oz = ounces  ·  1 oz ≈ 28.3495 g
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oz: g: Factor: 28.3495
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Weight Comparison
Ounces Grams
g = oz × 28.3495  ·  1 ounce = 28.3495 grams  ·  Conversion factor 28.3495

Interpretation

g = oz × 28.3495. Converts ounces to grams. Used in cooking, jewelry, and pharmaceuticals.

g = oz * 28.3495
Ounces to Grams

Variables

SymbolQuantityUnit
gMass in grams
ozMass in ounces

What it means

The ounce is an imperial unit of mass; the gram is a metric unit. The conversion factor is 28.349523125 (1 oz = 28.3495 g). This is common in cooking (recipe conversions), in precious metals (troy ounces are slightly different), and in medicine (drug weights). It is also used in postal services. Accurate conversion is important for precise measurements in these fields.

Worked example

Ounces to Grams – Two Examples

Real‑World
Scenario: A recipe calls for 8 oz of flour. Convert to grams.
ParameterValue
oz8
1g = 8 × 28.3495 = 226.796 g
Result 226.8 g ✓ Flour
Scenario: A gold bar weighs 16 oz (troy? but here avoirdupois). Convert to grams.
ParameterValue
oz16
1g = 16 × 28.3495 = 453.592 g
Result 453.59 g ✓ 1 lb (approx)
Insight: 1 oz ≈ 28.35 g. 16 oz = 1 lb ≈ 454 g.

Common mistakes

  • Conversion factor: 1 ounce = 28.3495 grams – multiply ounces by this factor.
  • Direction: This converts oz to g – for g to oz, use 0.035274.
  • Fluid ounces: Not the same as weight ounces – do not confuse.
  • Precision: Use appropriate decimal places.
  • Applications: Used in cooking, chemistry, and commerce.

Applications

Ounces to grams conversion, g = oz × 28.3495, is widely used in cooking, nutrition, and pharmaceuticals. The gram is the standard metric unit of mass, while ounces are used in the US and UK. This conversion is critical for food labelling, medication dosing, and international trade. Engineers may use it for material weight calculations. By converting accurately, professionals ensure correct product weights, patient safety, and compliance with regulations. This conversion is a daily tool for anyone dealing with small masses in a global context.

  • Cooking and recipe conversion between imperial and metric
  • Food packaging and nutrition labelling
  • Pharmaceutical dosing and compounding
  • Precious metal and jewellery weight measurement
  • International trade of small‑mass items

Frequently Asked Questions

Q01What is the formula for converting ounces to grams?
A01

The conversion is g = oz × 28.3495. This is based on the avoirdupois ounce.

Q02What is the common mistake when using this formula?
A02

Confusing standard avoirdupois ounces with troy ounces, which have a different conversion factor (31.1035 g).

Q03What is the approximate conversion for quick mental estimation?
A03

Multiply ounces by 28 to get grams.

Q04What is the exact definition of an ounce in grams?
A04

1 avoirdupois ounce = 28.349523125 g.

Q05How do you convert 4 oz to grams?
A05

4 × 28.3495 = 113.398 g.

Q06What is the inverse conversion from grams to ounces?
A06

oz = g / 28.3495 = g × 0.035274.

Q07What are the applications of this conversion?
A07

Cooking, weight measurement, and precious metals (troy ounces).