31.1g
Troy Ounces to Grams
The ounce that gold, silver and platinum are priced in.
Tip: you can type “8 oz flour” or “500 ml to oz”.
1 troy ounce =
Try:
about 1.1 × one ounce
Reading this as troy ounces — the most common; check your label.
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For:
Details
All units
- oz
- 1.1
- lb
- 0.0686
- g
- 31.1
- kg
- 0.0311
How we got this
1 troy ounce × 31.1034768 g/oz t = 31.103477 g
1 oz = 28.349523125 g. 1 lb = 453.59237 g. 1 troy oz = 31.1034768 g (international avoirdupois and troy definitions, NIST).
Also useful:
Gold, silver, platinum and palladium are priced and traded in troy ounces. One troy ounce is 31.1034768 g. A regular (avoirdupois) ounce is 28.3495 g, so the troy ounce is about 9.7% heavier. The pounds run the other way: a troy pound is 12 troy ounces (373.24 g), while a regular pound is 16 ounces (453.59 g).
To get a price per gram, divide the per-ounce price by 31.1035. A coin or bar labeled 1 oz is almost always 1 troy oz. Some coins also contain alloy, so the coin can weigh more than the gold in it: a 1 oz American Gold Eagle holds one troy ounce of gold and weighs 33.93 g.
Quick answers
- 1 oz t
- 31.1 g
- 1 oz t
- 1.1 oz
Formula
g = oz t × 31.1034768oz t = g ÷ 31.1034768oz = oz t × 1.097143oz t = oz ÷ 1.097143
Conversion table
| Amount | oz t to g | oz t to oz |
|---|---|---|
| 1 | 31.1 | 1.1 |
| 2 | 62.21 | 2.19 |
| 3 | 93.31 | 3.29 |
| 4 | 124.4 | 4.39 |
| 5 | 155.5 | 5.49 |
| 6 | 186.6 | 6.58 |
| 7 | 217.7 | 7.68 |
| 8 | 248.8 | 8.78 |
| 9 | 279.9 | 9.87 |
| 10 | 311 | 10.97 |
| 12 | 373.2 | 13.17 |
| 16 | 497.7 | 17.55 |
| 16.9 | 525.6 | 18.54 |
| 20 | 622.1 | 21.94 |
| 24 | 746.5 | 26.33 |
| 32 | 995.3 | 35.11 |
| 50 | 1,555 | 54.86 |
| 64 | 1,991 | 70.22 |
| 100 | 3,110 | 109.7 |
Which ounce?
| Ounce | Exactly | Used for |
|---|---|---|
| Ounce (oz) | 28.349523125 g | Food, mail, kitchen scales, the default meaning of a bare “oz”. |
| US fluid ounce (US fl oz) | 29.5735295625 mL | US labels, bottles, cans. 16 of them make a US pint. |
| UK fluid ounce (UK fl oz) | 28.4130625 mL | UK recipes, older imperial labels. 20 of them make a UK pint. |
| Troy ounce (oz t) | 31.1034768 g | Gold, silver, platinum. About 10% heavier than the ounce on your kitchen scale. |
Common amounts
- 8 oz cup 237 mL
- 12 oz can 355 mL
- 16.9 oz bottle 500 mL
- 20 oz bottle 591 mL
- 3.4 oz TSA 100 mL
- 1.7 oz perfume 50 mL
- 8 oz steak 227 g
- 1 oz gold 31.1 g
Questions
How many grams is a troy ounce?
31.1034768 g, usually rounded to 31.1 g.
How many troy ounces is 100 g?
3.215 troy oz.
Is a troy ounce heavier than a regular ounce?
Yes, by about 9.7%: 31.1035 g against 28.3495 g.
How many troy ounces are in a kilogram?
32.15 troy oz.
How do I find the price per gram?
Divide the price per troy ounce by 31.1035. At $2,000 per troy ounce that is $64.30 per gram.