Troy Weight Conversion Calculator
Convert among different troy units of weight or mass commonly used for precious metals such as gold, silver, and platinum along with gemstones.
| Unit | Symbol | Value | In Grains |
|---|---|---|---|
| Carat (metric) | ct | - | 3.08647214 gr |
| Point (metric) | pt | - | 0.0308647214 gr |
| Dram (troy) | dr | - | 60 gr |
| Grain (troy) | gr | - | 1 gr |
| Gram | g | - | 15.4323607 gr |
| Milligram | mg | - | 0.0154323607 gr |
| Ounce (troy) | oz | - | 480 gr |
| Pennyweight | dwt | - | 24 gr |
| Pound (troy) | lb | - | 5760 gr |
About Troy Weight System
The troy weight system is still commonly used for precious metals such as gold, silver, and platinum along with gemstones. It differs from the avoirdupois system used for most other weight measurements.
Key relationships: 1 troy pound = 12 troy ounces = 240 pennyweights = 5760 grains
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Troy Weight Conversion Calculator
When it comes to weighing gold, silver, platinum, or gemstones, accuracy is everything — and that’s where a Troy Weight Conversion Calculator becomes essential. The troy system, with its roots in the medieval trading markets of Troyes, France, remains the global standard for measuring precious metals today.
What Is the Troy Weight System?
The troy weight system is a traditional unit of mass used primarily for precious metals and gemstones. Unlike the avoirdupois system (the standard used in the U.S. for everyday items), the troy system uses slightly heavier ounces — 1 troy ounce = 31.1034768 grams, while 1 avoirdupois ounce = 28.3495231 grams.
In other words, a troy ounce is about 9.7% heavier than a regular ounce. This difference is crucial for accurate valuation of gold, silver, and platinum.
Troy Weight Units and Their Relationships
Here’s a quick look at the troy units, their symbols, and values in grains (gr):
| Unit Name | Symbol | Value in Grains (gr) |
|---|---|---|
| Carat (metric) | ct | 3.08647214 |
| Point (metric) | pt | 0.0308647214 |
| Dram (troy) | dr | 60 |
| Grain (troy) | gr | 1 |
| Gram | g | 15.4323607 |
| Milligram | mg | 0.0154323607 |
| Ounce (troy) | oz | 480 |
| Pennyweight | dwt | 24 |
| Pound (troy) | lb | 5760 |
The grain is the smallest common unit in the troy system. All other troy measurements are derived from it.
How to Convert Troy Units – Plain Text Formulas
You can easily perform conversions using simple text-based formulas.
1. Convert troy ounces to grams:
Grams = Troy ounces × 31.1034768
2. Convert grams to troy ounces:
Troy ounces = Grams ÷ 31.1034768
3. Convert pennyweight to troy ounces:
Troy ounces = Pennyweight ÷ 20
4. Convert grains to troy ounces:
Troy ounces = Grains ÷ 480
5. Convert troy pounds to troy ounces:
Troy ounces = Troy pounds × 12
These formulas can be used manually, but for faster results, it’s easier to use an online Troy Weight Conversion Calculator.
Why Use a Troy Weight Conversion Calculator?
When dealing with precious metals, precision down to the smallest unit matters. A Troy Weight Conversion Calculator eliminates manual errors and ensures that conversions are accurate and consistent.
Common uses include:
- Jewelry making – measuring gold and gemstones.
- Bullion trading – pricing and selling gold or silver bars.
- Laboratory analysis – accurate mass measurement of fine materials.
For broader measurement needs (like grams, pounds, and kilograms), you can also check out the weight conversion calculator which includes both troy and avoirdupois systems.
Troy Weight vs Avoirdupois Weight
Many people confuse troy ounces and regular ounces, but their difference has a significant financial impact in metal trading.
| System | 1 Pound Equals | 1 Ounce Equals |
|---|---|---|
| Troy | 12 troy ounces | 31.1034768 grams |
| Avoirdupois | 16 ounces | 28.3495231 grams |
In short, a troy pound contains fewer ounces but each is heavier. Always confirm which system you’re using before recording weights — especially in international transactions.
If you frequently convert between kilograms and pounds, the kilograms to pounds calculator can help simplify your calculations.
Practical Example – Converting Gold Weight
Let’s say you have 10 grams of gold and want to know its equivalent in troy ounces.
Formula:
Troy ounces = Grams ÷ 31.1034768
Calculation:
10 ÷ 31.1034768 = 0.3215 troy ounces
So, 10 grams of gold equals 0.3215 troy ounces — the standard measurement used in gold markets worldwide.
Real-World Importance of the Troy System
While the metric system dominates global commerce, the troy system endures in the precious metals industry because of its historical consistency. Since the 15th century, troy weight has ensured uniformity in metal pricing across markets.
Even today, gold and silver prices quoted on exchanges like the London Bullion Market Association (LBMA) are based on troy ounces — not grams or standard ounces.
For other specialized conversions, such as measuring physical forces or pressure differences, you can explore the force conversion calculator — perfect for scientific and industrial applications.
Tips for Accurate Precious Metal Conversions
- Always specify the unit system — “oz t” for troy ounces or “oz av” for avoirdupois ounces.
- Double-check scales — ensure your scale supports troy measurement mode.
- Use reliable digital calculators — they reduce rounding errors.
- Keep consistency — never mix troy and standard ounces in a single calculation.
- Convert large values in smaller steps — first to grains, then to desired units for greater precision.
A Troy Weight Conversion Calculator is indispensable for anyone working with precious metals, whether you’re a jeweler, collector, or trader. It bridges the gap between ancient measurement traditions and modern digital precision, ensuring your conversions are always accurate.
If you regularly deal with multiple measurement systems — from distance and height conversions to mass and volume — explore the full suite of tools available in the conversion calculator section of CalculatorCave.
In the world of gold and silver, precision equals profit — and the Troy Weight Conversion Calculator ensures you never lose a gram (or grain) to miscalculation.