Ounces to Grams

Culinary Mass Metrology & NIST Standards

The standard grocery and food scale ounce is the avoirdupois ounce (1 oz 28.349523 grams):

• 1 Avoirdupois Ounce (oz): 28.349523 g = 0.028350 kg = (1) / (16) lb

• 1 Troy Ounce (oz t): 31.103477 g (used for precious metals)

Primary Kitchen Baking Mass Equivalents

• 1.0 oz (Snack Serving): 28.35 g

• 2.0 oz: = 56.70 g

• 4.0 oz: = 113.40 g

• 8.0 oz: = 226.80 g

• 12.0 oz: = 340.19 g

• 16.0 oz: 453.59 g

• 28.0 oz (Large Can Tomatoes): = 793.79 g

Equations

• Grams (g) = Ounces (oz) × 28.3495

• Ounces (oz) = Grams (g)28.3495 = Grams × 0.035274

How to Use This Calculator

Enter your Weight Value to Convert (e.g. 4.0), Ounce Weight Standard — choose from Avoirdupois Ounce (28.35 g / Standard Food & Kitchen Scale), Troy Ounce (31.10 g / Gold, Silver & Precious Bullion), Kitchen & Food Scale Benchmark — choose from Custom Weight Value, 1.0 oz (28.35 g / Standard Snack Serving Size), 4.0 oz (113.4 g / 1/4 lb Burger / 1 Butter Stick), and Conversion Direction — choose from Ounces to Grams (oz → g / multiply by 28.35), Grams to Ounces (g → oz / multiply by 0.03527). Results update instantly as you type — adjust any value to compare scenarios.

The Formula

Conversion factors (to SI base unit or reference unit):

oz: 1.0

maximumFractionDigits: 2

Worked Example

A recipe calling for 8 ounces of cream cheese requires exactly 226.8 grams on a digital kitchen scale.

Understanding Your Result

Unit conversion precision: round to the same number of significant figures as your original measurement. Converting 6 feet to meters gives 1.8288 m — but if your measurement was approximate (±1 inch), expressing more than 2 decimal places is false precision. For international trade and technical specifications, SI units (meters, kilograms, liters) are the standard. US customary units (feet, pounds, gallons) differ from Imperial UK units: 1 US gallon = 3.785 L vs. 1 UK gallon = 4.546 L.