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Convert troy ounces (oz t) to grams (g) and grams to troy ounces instantly. Built for bullion, precious metals, and any weight quoted in troy ounces—not avoirdupois ounces.
Last updated: April 8, 2026
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Troy ounces
1 oz t
Grams
31.1034768 g
Milligrams
31,103.4768 mg
Quick facts
Formula
g = oz t × 31.1034768
Formula
oz t = g ÷ 31.1034768
Also shown
mg
Ten troy ounces of metal:
Input
10 oz t
Result
311.0348 g
The troy ounce is used in precious metals markets worldwide. One troy ounce is defined as exactly 31.1034768 grams. This page multiplies or divides by that factor so you can move between listings in troy ounces and metric grams (or milligrams) without mixing in avoirdupois ounces.
grams = troy ounces × 31.1034768troy ounces = grams ÷ 31.1034768milligrams = grams × 1,000For cooking or postal weight in common US ounces, use an avoirdupois grams-to-ounces tool instead.
| oz t | Grams (exact) |
|---|---|
| 0.5 | 15.5517384 |
| 1 | 31.1034768 |
| 5 | 155.517384 |
| 12 | 373.2417216 |
| 100 | 3110.34768 |
Need gemstone carats? Try our carats to grams converter.
Get Custom Calculator for Your PlatformResult: 1 oz t = 31.1034768 g
Result: 250 g ≈ 8.0377 oz t
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