Quick answer
What this calculator tells you
Precious metal math gets confusing because markets use troy ounces while household scales often use grams or regular ounces. This converter keeps the units straight.
Formula
Precious Metal Weight Converter formula
One troy ounce equals 31.1034768 grams, 20 pennyweights, or 480 grains.
Use cases
When to use it
- Convert scale readings into troy ounces for spot-price math.
- Translate pennyweight quotes into grams.
- Avoid mixing regular ounces with troy ounces.
Limits
What to check before relying on the number
- Use troy ounces for precious metals, not regular avoirdupois ounces.
- Round only at the end when calculating value.
- Small jewelry items need a scale with fine resolution.
FAQ
Common questions
Is a troy ounce the same as a regular ounce?
No. A troy ounce is 31.1034768 grams, while a regular avoirdupois ounce is about 28.3495 grams.
How many pennyweights are in a troy ounce?
There are 20 pennyweights in one troy ounce.