DWT to OZ Converter
Precise pennyweight to ounce conversion for gold, silver, and jewelry weights. Instant dwt oz calculator online.
Popular DWT to OZ Values
| DWT | OZ | Common Use |
|---|---|---|
| 1 | 0.0556 | Small gem setting |
| 10 | 0.5556 | Ring band |
| 20 | 1.1111 | Pendant weight |
| 50 | 2.7778 | Bracelet |
| 100 | 5.5556 | Gold bar portion |
| 200 | 11.1111 | Silver ingot |
Conversion Formula
1 pennyweight (dwt) equals exactly 24 grains, and 1 troy ounce (oz) equals 480 grains. Divide dwt by 20 for oz: oz = dwt × 0.0555555556.
- Input dwt value.
- Multiply by 0.0555555556 (or divide by 20).
- Round to selected decimals.
Reverse: dwt = oz × 20 (or oz / 0.0555555556).
Visual Comparison
Bars show relative dwt oz scale for precious metals.
Precious Metals Applications
- Gold refining: Scrap priced per dwt, melted to oz bars.
- Jewelry design: Stones set by dwt, total yield in oz.
- Silver trading: Coins weighed in dwt for purity checks.
- Assaying: Samples assayed in dwt, reported as oz per ton.
Unit Origins
Pennyweight traces to medieval England, based on silver penny mass (1/240 pound). Troy ounce standardizes gems and metals globally, differing from avoirdupois ounce (1.04167 troy oz = 1 av oz) used in groceries.
FAQ
What is dwt to oz ratio?
Fixed at 1 dwt = 0.0555555556 oz, from troy system where 20 dwt = 1 oz.
Is this troy or avoirdupois ounce?
Troy ounce for dwt oz conversions in metals; avoirdupois is heavier and unrelated.
Can I convert bulk values?
Enter one value at a time; multiply result by quantity for batches.
How precise for gold trading?
Select 4-6 decimals matches assay standards for karat pricing.
Why use dwt over grams?
Traditional in US/UK bullion markets for fine weights under 1 oz.
Does it handle fractions?
Yes, supports decimals like 0.5 dwt = 0.0278 oz.
Troy oz vs regular oz difference?
Troy oz = 31.1035g; regular = 28.3495g (9.7% lighter).
Free for commercial use?
This calculator provides accurate dwt oz results without limits.
References
- National Institute of Standards and Technology. (2023). Specifications, Tolerances, and Other Technical Requirements for Weighing and Measuring Devices. NIST Handbook 44.
- British Standards Institution. (2015). BS 350: Conversion Factors and Tables, Part 2: Metric Units.