Ounces to Grams (oz to g) Converter

Ounces to Grams Conversion

Ounces are imperial and grams are metric, so this conversion adapts American measurements to the metric world. It is perfect for following US recipes and filling out customs forms.

Conversion formula: 1 oz = 28.3495 g — multiply ounces by 28.3495.

When You Need This

US recipes — adapting ounces to a metric scale
International shipping — customs forms need grams
Food packaging — converting net weights
Jewelry & crafts — small precise weights
Coffee & tea — sold by the ounce, weighed in grams

How to Convert

The Conversion Formula

One ounce equals exactly 28.349523125 grams. To convert, multiply ounces by 28.3495. For a quick estimate, multiply by 28. To reverse, divide grams by 28.3495.

grams = ounces × 28.3495 — for example, 4 oz × 28.3495 ≈ 113.4 g.

Using the Tool

Enter the value

Type the amount you want to convert into the input field.

Read the result instantly

The converted value appears immediately in the second field — no button to press.

Swap or pick any unit

Press the swap button to reverse direction, or open a dropdown to choose a different unit.

Copy the result

Tap the copy icon next to either field to copy the value for your records.

Worked Examples

Ounces	Calculation	Grams
1 oz	`1 × 28.3495`	28.35 g
2 oz	`2 × 28.3495`	56.70 g
4 oz	`4 × 28.3495`	113.40 g
16 oz	`16 × 28.3495`	453.59 g

Features & Use Cases

Tool Capabilities

Instant Two-Way Conversion

Results update as you type. Use the swap button to reverse the direction in one click.

Any Unit, Any Pair

Searchable dropdowns let you switch to grams, ounces, pounds, stone, tons, carats and more — not just the default pair.

Copy & Quick Reference

Copy either value with one tap, and check the built-in reference table for common conversions at a glance.

Common Use Cases

US Recipes

American recipes list ounces. Convert to grams to measure ingredients precisely on a standard kitchen scale.

International Shipping

Customs declarations require metric weights. Convert package contents from ounces to grams for accurate forms.

Jewelry & Crafts

Beads, metals, and craft materials sold by the ounce convert to grams for precise project measurements.

Coffee & Tea

Coffee and loose tea are often priced per ounce. Convert to grams to dose your brew precisely.

Runs in your browser: All calculations happen locally on your device. Nothing is uploaded — fast and private.

Frequently Asked Questions

How many grams are in an ounce?

One ounce equals 28.349523125 grams, usually rounded to 28.35 g.

How do I convert 8 ounces to grams?

Multiply by 28.3495: 8 × 28.3495 ≈ 226.8 g (about half a pound).

Is 16 ounces equal to one pound?

Yes. 16 oz = 1 lb = 453.59 g. That is why a 16 oz package equals one pound.

Which ounce does this tool use?

The avoirdupois ounce (28.35 g) for everyday weights. The troy ounce (31.10 g) applies only to precious metals.

Why do customs forms require grams?

Most countries use the metric system, so international shipping paperwork is standardized in grams and kilograms.

Is multiplying by 28 accurate enough?

For cooking it is fine (about 1% off). For shipping or science, use 28.3495 for accuracy.

Ounces to Grams