1 Pennyweight to Carat
Quick answer
1 Pennyweight (dwt) equals
7.775869 ct
To convert 1 Pennyweights to Carats, multiply by 7.7758692. Therefore, 1 Pennyweight (dwt) equals 7.775869 Carat (ct).
Formula: ct = dwt × 7.7758692. Calculation: 1 × 7.7758692 = 7.775869 ct.
Convert Pennyweight (dwt) to Carat (ct) online with our free unit converter. In mass, 1 dwt = 7.775869 ct. Explore step-by-step conversion steps, mathematical formulas, and quick conversion reference tables below.
Worked example: converting Pennyweight to Carat
- Step 1 — start with the formula. ct = dwt × 7.7758692
- Step 2 — substitute your figure. 1 dwt × 7.7758692
- Step 3 — read the result. 1 dwt = 7.775869 ct
- Step 4 — check it in reverse. dwt = ct × 0.1286029863 returns 1 dwt, which matches the figure you started with.
Mass Converter
26 units available
1 dwt = 7.775869 ct
Formula:
ct = dwt × 7.7758692With your value: 1 dwt = 7.7758692 ct
How big is that?
Everyday references on a logarithmic scale, all expressed in pennyweight so you can sanity-check the result.
Other Pennyweight to Carat conversions
Pennyweight to Carat Conversion Table
| Pennyweight (dwt) | Carat (ct) |
|---|---|
| 0.5 | 3.887935 |
| 1 | 7.775869 |
| 2 | 15.551738 |
| 5 | 38.879346 |
| 10 | 77.758692 |
| 15 | 116.638038 |
| 20 | 155.517384 |
| 25 | 194.39673 |
| 50 | 388.79346 |
| 100 | 777.58692 |
| 250 | 1,943.9673 |
| 500 | 3,887.9346 |
| 1000 | 7,775.8692 |
Carat to Pennyweight Conversion Table
| Carat (ct) | Pennyweight (dwt) |
|---|---|
| 0.5 | 0.064301 |
| 1 | 0.128603 |
| 2 | 0.257206 |
| 5 | 0.643015 |
| 10 | 1.28603 |
| 15 | 1.929045 |
| 20 | 2.57206 |
| 25 | 3.215075 |
| 50 | 6.430149 |
| 100 | 12.860299 |
| 250 | 32.150747 |
| 500 | 64.301493 |
| 1000 | 128.602986 |
Where these values come from
Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.
Pennyweight (dwt)
Mass
Traceable to the kilogram, defined by fixing the Planck constant at 6.626 070 15 × 10⁻³⁴ J·s. Avoirdupois masses derive from the 1959 international pound (0.453 592 37 kg exactly).
Source: BIPM, The International System of Units (SI), 9th edition, 2019 (updated 2024)
Bureau International des Poids et Mesures · Reviewed 2026-07-01
Carat (ct)
Mass
The metric carat is exactly 200 mg, agreed internationally in 1907.
National Institute of Standards and Technology (US) · Reviewed 2026-07-01
How to Convert Pennyweight to Carat
To convert from Pennyweight (dwt) to Carat (ct), multiply the value by 7.7758692.
Formula: ct = dwt × 7.7758692
Reverse: dwt = ct × 0.1286029863
Step-by-Step Example
- Start with your value in Pennyweight. For example: 5 dwt
- Multiply by the conversion factor: 5 x 7.7758692
- The result is: 38.879346 ct
Pennyweight and Carat Relationship
This calculation facilitates standardized conversion between recognized units of mass. Since 1 Pennyweight equals approximately 7.7759 Carats, the Pennyweight represents a larger unit interval than the Carat. Understanding the relationship between Pennyweight and Carat is essential for accurate calculations in physics, engineering, commerce, and daily applications.
About Pennyweight
The pennyweight (dwt) equals 1/20 of a troy ounce, about 1.555 grams. Jewellers still price scrap gold by the pennyweight.
Common uses of Pennyweight: jewellery trade, gold scrap, assaying.
About Carat
The carat equals 200 milligrams and is the standard unit for measuring gemstone weight.
Fun Fact: The word "carat" comes from the carob seed, which was used as a balance weight in ancient gem trading.
Common uses of Carat: gemstones, diamonds, jewelry.
Frequently Asked Questions
- What is 1 Pennyweight in Carat?
- 1 Pennyweight equals 7.775869 Carat.
- How many Carats are in 1 Pennyweight?
- There are exactly 7.7758692 Carats in 1 Pennyweight. This means the conversion factor from Pennyweight to Carat is 7.7758692.
- What is the formula to convert Pennyweight to Carat?
- The formula to convert Pennyweight to Carat is: ct = dwt × 7.7758692. For example, to convert 10 Pennyweights to Carats, you would multiply 10 by 7.7758692.
- What is a Pennyweight?
- The pennyweight (dwt) equals 1/20 of a troy ounce, about 1.555 grams. Jewellers still price scrap gold by the pennyweight.
- What is a Carat?
- The carat equals 200 milligrams and is the standard unit for measuring gemstone weight.
- What are the common uses of Pennyweight?
- The Pennyweight is commonly used in jewellery trade, gold scrap, assaying.
Related Mass Conversions
Cite this page
UnitConvertLab. (2026). 1 Pennyweight to Carat. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/1-pennyweight-to-carat