Ounces ⇄ Grams

Standard Conversion RatioNIST SP 811 Factor

Ounces to Grams Converter: 1 oz = 28.3495 g (oz to g)

Convert ounces to grams: 1 oz = 28.349523 g exactly. Free online oz to g calculator with exact conversion factor, live arithmetic steps, and baking math.

Direct Answer1 ounce (oz) equals 28.349523125 grams (g) exactly.

Reverse Ratio: 1 g = 0.035 oz

Looking for a fast, verified weight conversion tool? 1 ounce (oz) equals 28.349523125 grams (g) exactly. Use our interactive tool below for instant calculations, or explore the exact conversion formulas, worked examples, and pair-specific scenarios.

Interactive Visual Mass Ratio & Scale

Dynamic Visualizer

Visualize the physical magnitude difference between 1 Ounces (oz) and Grams (g) in real time:

1 oz

1.0000 oz

28.35 g

28.3495 g

⚖️

Physical Metrology Insight

1 Ounce is equivalent to 28.3495 grams. Therefore, 1 oz contains over 28.35 individual g units.

How to Convert Ounces to Grams

One avoirdupois ounce (oz) equals exactly 28.349523125 grams (g, gm). In culinary baking, using grams provides precision for pastries and sourdough bread.

The Standard Conversion Formula

Verified Metric Ratio

g = oz \times 28.3495

Multiply ounces by 28.349523. To convert in reverse (Grams back to Ounces), divide grams by 28.349523.

Step-by-Step Example Calculation

Input Given Value

Identify ounce quantity.

Apply Math Factor

Multiply by 28.349523125.

Final Calculated Result

Example: 8 oz × 28.3495 = 226.796 g.

Computed Worked Examples

These step-by-step arithmetic examples demonstrate how the conversion formula applies to everyday values:

Worked Example 1: Converting 1 oz to g

Problem: Calculate how many grams are in 1 ounce.

g = 1 × 28.349523125

Solution: 1 oz = 28.3495 g (28.3495 grams).

Worked Example 2: Converting 10 oz to g

Problem: Calculate how many grams are in 10 ounces.

g = 10 × 28.349523125

Solution: 10 oz = 283.4952 g (283.4952 grams).

Worked Example 3: Converting 12 oz to g

Problem: Calculate how many grams are in 12 ounces.

g = 12 × 28.349523125

Solution: 12 oz = 340.1943 g (340.1943 grams).

oz to grams Quick Reference Lookup

Common standard mass quantities converted with precision:

Ounces (oz)	Grams (g)	Formula Breakdown
1 oz	28.3495 g	`1 × 28.349523125`
2 oz	56.699 g	`2 × 28.349523125`
5 oz	141.7476 g	`5 × 28.349523125`
10 oz	283.4952 g	`10 × 28.349523125`
15 oz	425.2428 g	`15 × 28.349523125`
20 oz	566.9905 g	`20 × 28.349523125`
25 oz	708.7381 g	`25 × 28.349523125`
50 oz	1417.4762 g	`50 × 28.349523125`
75 oz	2126.2142 g	`75 × 28.349523125`
100 oz	2834.9523 g	`100 × 28.349523125`
150 oz	4252.4285 g	`150 × 28.349523125`
200 oz	5669.9046 g	`200 × 28.349523125`

View full printable kg to lbs Chart →

🧠

Kitchen Culinary Mental Math Shortcut

Rule: Multiply the ounces by 28, then add a tiny pinch for every few ounces.

To convert 4 oz: 4 × 28 = 112 g. 4 × 0.35 ≈ 1.4 g. Total = 113.4 g (exact is 113.40 g).

💡 Note: Multiplying by 28.35 yields accuracy within 0.002% for everyday cooking and baking.

Popular oz to grams Benchmarks

Instant answers for frequent real-world search queries:

View All Quick Benchmarks →

1 oz=28.35 g 1 oz=28.35 g

Practical Real-World Use Cases

Everyday Applications

Common scenarios where converting between Ounces (oz) and Grams (g) is essential:

🍞American Cookbook Baking

Converting US Recipe Ounces to European Gram Scales

American heritage baking recipes often call for ingredients in ounces (e.g. 8 oz cream cheese, 12 oz chocolate chips).

Scenario Calculation:8 oz of cream cheese equals 8 × 28.349523125 = 226.80 g (standard 1 block US packaging).

💡Pro-Tip: Modern digital scales allow one-touch toggling between grams and ounces to verify package net weights.

📬Postal Shipping & Small Packets

Small Parcel International Customs Declarations

When sending packages internationally from the US, customs forms require item net weights in grams or kilograms.

Scenario Calculation:A 6 oz handmade soap bar translates to 6 × 28.349523125 = 170.10 g for commercial shipping declarations.

💡Pro-Tip: List weights accurately on customs manifests to avoid border clearance inspection holds.

🔬Dietary Nutrition & Macronutrient Tracking

Meat & Protein Portion Weighing

Bodybuilders and fitness enthusiasts weighing chicken breast or salmon portions measured in 4 oz or 6 oz servings.

Scenario Calculation:A 6 oz raw chicken tender portion equals 6 × 28.349523125 = 170.1 g.

💡Pro-Tip: Log cooked meats with cooked nutrition entries, as meat loses roughly 25% moisture during pan frying or roasting.

Conversion factors follow the 1959 International Yard and Pound Agreement and NIST SP 811. Learn more in our methodology or view authoritative records at BIPM SI Brochure, NIST SP 811, and NPL Metrology.

Measurement Standards & Accuracy

Standard Multipliers

Factors based on the 1959 International Yard and Pound Agreement and NIST SP 811.

Sources

BIPM SI Brochure (9th Edition)
NIST SP 811 Metrology Standard
1959 International Yard & Pound Agreement

Accuracy & Policy

Standard Exact Multipliers (e.g., 1 lb = 0.45359237 kg)

Reviewed: October 2026 • About our methodology →

Related Weight Tools, Guides & Encyclopedia

Explore deeper contextual resources related to Ounces and Grams:

oz to grams — FAQs

Is 1 ounce exactly 28.349523125 grams?

Yes. Under the 1959 International Yard and Pound Agreement, 1 pound equals exactly 0.45359237 kg. Since there are exactly 16 ounces in a pound, dividing 453.59237 grams by 16 gives 28.349523125 grams exactly.

What is 8 oz in grams?

8 oz equals 226.80 grams (226.796 g). This is the exact weight of a standard block of cream cheese in the United States.

What is 16 oz in grams?

16 oz is 1 pound, which equals exactly 453.59237 grams.

How do you convert ounces to grams manually?

Multiply the ounces by 28.35. For example, for 5 oz: 5 × 28.35 = 141.75 grams.

What is the difference between an avoirdupois ounce and a troy ounce?

An avoirdupois ounce (used for groceries and packages) equals 28.3495 g. A troy ounce (used exclusively for precious metals like gold and silver) equals exactly 31.1034768 grams, making it roughly 9.7% heavier.