Ounces to Grams Converter
Exact conversion: 1 avoirdupois ounce equals 28.3495 grams.
Interactive Ounces to Grams (oz to g) Converter
1 avoirdupois ounce equals exactly 28.349523125 grams (standard kitchen rounding: 28.35g). 16 ounces equal 1 pound (453.59g).
Equivalent Across All 4 Weight Units
Exact mass values in Metric and Imperial standardsUnderstanding Ounces to Grams (oz to g) Conversion
Converting avoirdupois ounces (oz) to grams (g) is one of the most common tasks when adapting American recipes to digital kitchen scales or baking outside the United States.
Key weight conversion benchmarks:
- 1 ounce (oz) = 28.3495 grams (widely rounded to 28.35g)
- 2 ounces = 56.70 grams
- 3.5 ounces = 99.22 grams (~100 grams / typical European chocolate bar)
- 4 ounces (1/4 lb) = 113.40 grams (1 stick of butter in the US)
- 8 ounces (1/2 lb) = 226.80 grams (standard US cream cheese block)
- 16 ounces (1 lb) = 453.59 grams (1 standard loaf or meat package)
- 35.27 ounces = 1,000 grams (1 kilogram / 2.205 lbs)
How to Convert Ounces to Grams: Formula & Calculation
Grams (g) = Ounces (oz) × 28.349523 - Multiply ounces by 28.35: Multiply the number of ounces by 28.3495 (or 28.35 for everyday baking).
- For fractional ounces: If an ounce is written as a fraction (such as 1/4 oz or 1/2 oz), convert to decimal first: 0.25 oz × 28.35 = 7.09g; 0.5 oz × 28.35 = 14.17g.
- Scale accuracy: Digital kitchen scales generally measure to the nearest whole gram (±1g), so rounding 28.35g to 28g is common for cooking stews and roasts, while baking pastry benefits from 28.3g precision.
Worked Culinary Examples
Example 1: Unsalted Butter Stick
An American cake recipe specifies 4 ounces of softened butter.
- Formula: 4 oz × 28.3495 g/oz.
- Calculation: 4 × 28.3495 = 113.4 grams.
- Kitchen context: 4 oz = 1/4 lb = 1 standard US stick of butter = 8 tablespoons.
Example 2: Block of Cream Cheese for Cheesecake
A New York cheesecake formula requires two 8-ounce packages of cream cheese.
- Total ounces: 2 × 8 oz = 16 ounces (1 pound).
- Calculation: 16 × 28.3495 = 453.59 grams.
Quick Reference Conversion Table: Ounces to Grams
| Ounces (oz) | Grams (g) | Kilograms (kg) | Pounds (lb) | Common Kitchen Package |
|---|---|---|---|---|
| 1/4 oz | 7.09 g | 0.007 kg | 0.016 lb | 1 packet active dry yeast (7g) |
| 1/2 oz | 14.17 g | 0.014 kg | 0.031 lb | - |
| 3/4 oz | 21.26 g | 0.021 kg | 0.047 lb | - |
| 1 oz | 28.35 g | 0.028 kg | 0.063 lb | 1 square baking chocolate |
| 2 oz | 56.7 g | 0.057 kg | 0.125 lb | - |
| 3 oz | 85.05 g | 0.085 kg | 0.188 lb | - |
| 4 oz | 113.4 g | 0.113 kg | 0.250 lb | 1 stick butter (1/2 cup) |
| 5 oz | 141.7 g | 0.142 kg | 0.313 lb | - |
| 6 oz | 170.1 g | 0.170 kg | 0.375 lb | - |
| 8 oz | 226.8 g | 0.227 kg | 0.500 lb | 1 block cream cheese / 1 cup liquid |
| 10 oz | 283.5 g | 0.283 kg | 0.625 lb | - |
| 12 oz | 340.2 g | 0.340 kg | 0.750 lb | 1 bag chocolate chips (340g) |
| 14 oz | 396.9 g | 0.397 kg | 0.875 lb | - |
| 16 oz | 453.6 g | 0.454 kg | 1.000 lb | 1 lb package flour / pasta |
| 20 oz | 567 g | 0.567 kg | 1.250 lb | - |
| 24 oz | 680.4 g | 0.680 kg | 1.500 lb | - |
| 32 oz | 907.2 g | 0.907 kg | 2.000 lb | 2 lb family pack |
Common Weight Measuring Pitfalls
Confusing Weight Ounces with Fluid Ounces
Dry ounces measure mass on a balance or scale (1 oz = 28.35g). Fluid ounces measure liquid volume (1 fl oz = 29.57 mL). While water weighs almost exactly 1 ounce per fluid ounce, flour weighs only ~0.55 oz per fluid ounce.
Tare (Zero) Your Scale Correctly
Always place your mixing bowl on the scale and press TARE / ZERO before pouring in your ingredient so you don't accidentally include bowl weight.
Troy Ounces vs Avoirdupois Ounces
Cooking and commercial food packaging use the avoirdupois ounce (28.35g). The precious metals troy ounce (31.10g) is never used in culinary recipes.
Low-Weight Leaveners
For tiny quantities under 10 grams (like salt or baking soda), a standard 1-gram resolution kitchen scale can have a 20% to 50% relative error. Use a 0.1g pocket scale or measuring spoons for micro amounts.