Density and Mass
cttodwt
Convert metric carats (ct) to pennyweights (troy) (dwt).
Factor1 ct = 0.128603 dwt
Converter
ct
Accepts numbers or expressions, e.g. 150 + 14.7
Result
dwt
Rendered to 6 significant figures.
Formula
Formula
dwt = ct × 0.128603
Multiply any value in metric carats by 0.128603 to obtain the value in pennyweights (troy).
Worked example
Convert 100 ct to dwt.
- 01Start with 100 ct.
- 02Multiply by the conversion factor: 100 × 0.128603 = 12.8603 dwt.
Result100 ct = 12.8603 dwt
Conversion table
| ct | dwt |
|---|---|
| 1 | 0.1286 |
| 2 | 0.25721 |
| 5 | 0.64301 |
| 10 | 1.286 |
| 20 | 2.5721 |
| 50 | 6.4301 |
| 100 | 12.86 |
| 200 | 25.721 |
| 500 | 64.301 |
| 1000 | 128.6 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from ct to dwt?
1 ct equals 0.128603 dwt. To convert, multiply the value in metric carats by 0.128603.
How do I convert 1 ct to dwt?
1 ct = 0.128603 dwt. For any value, multiply by 0.128603.
How do I convert dwt back to ct?
Divide by the same factor — or equivalently, multiply by 7.775869. So 1 dwt = 7.77587 ct.
When would I need to convert metric carat to pennyweight (troy)?
Mass conversions appear in material balances, reagent dosing, and reconciling vendor specifications across imperial/metric systems.
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).