18 ounces to grams

18 ounces = 510.29142 grams

Rounded to a practical precision: 510.3 g.

ounces

grams

How the calculation works

One ounce is 28.34952 grams, so:

18 oz × 28.34952 = 510.29142 g

Reversing it, 510.29142 grams ÷ 28.34952 returns 18 ounces.

Nearby values

Ounces	Grams
14 oz	396.89332 g
15 oz	425.24285 g
16 oz	453.59237 g
17 oz	481.94189 g
18 oz	510.29142 g
19 oz	538.64094 g
20 oz	566.99046 g
21 oz	595.33999 g
22 oz	623.68951 g

About these units

Ounce (oz) — An ounce is one sixteenth of a pound, about 28.35 grams, used for food portions and postal weights.

Gram (g) — A gram is one thousandth of a kilogram and is the everyday unit for food and small quantities.

Frequently asked questions

How many grams is 18 ounces?

18 ounces is 510.29142 grams.

How do I convert ounces to grams myself?

Multiply by 28.34952. To go back, divide by 28.34952 — or multiply by 0.035274.

Is this figure exact?

The conversion factor between the ounce and the gram is fixed by definition. The figure above is rounded for readability; the converter carries full precision.

Convert other values

Full ounces to grams converter · All weight converters