How it's calculated
g = oz × k (reverse: oz = g ÷ k)
oz = ounces, g = grams, k = grams per ounce; avoirdupois = 28.349523, troy = 31.103477.
Common values
| Ounces | Avoirdupois (g) | Troy (g) |
|---|---|---|
| 1 | 28.35 | 31.10 |
| 2 | 56.70 | 62.21 |
| 4 | 113.40 | 124.41 |
| 8 | 226.80 | 248.83 |
Common questions
How many grams in an ounce?
An avoirdupois ounce is 28.3495 grams. A troy ounce, used for precious metals, is 31.1035 grams.
Why does gold use troy ounces?
The troy system is the traditional standard for precious metals, and it is heavier than the everyday avoirdupois ounce, so the two must not be mixed up.