Convert Pennyweight to Centigram
Convert pennyweights to centigrams instantly. 1 pennyweight = 155.51738 centigram — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Centigram to Pennyweight converter for the reverse conversion.
Units explained
Pennyweight
The pennyweight (dwt) equals one-twentieth of a troy ounce, 24 grains (about 1.555 g).
From the mass of a medieval English silver penny; symbol dwt from 'denarius weight'.
Jewelry making and precious-metal scrap valuation in the US.
Derived from the medieval English coinage system.
Centigram
A centigram (cg) equals 0.00001 kilogram, or 0.01 gram.
From the SI prefix 'centi-' (from Latin 'centum', hundred).
Used in pharmacology and analytical chemistry.
Part of the original metric system of 1795.
Pennyweight to Centigram conversion formula
The relationship between pennyweights and centigrams:
To convert pennyweights to centigrams, multiply the value in pennyweights by 155.51738. To reverse, multiply centigrams by 0.0064301495.
How to use this converter
Type a value into the calculator. The result in centigrams updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Centigram to Pennyweight converter for the reverse direction.
Step-by-step: convert pennyweights to centigrams
- Write down the value in pennyweights (dwt).
- Multiply that value by the factor 155.51738.
- The product is the equivalent value in centigrams (cg).
- To reverse, multiply the centigram value by 0.0064301495.
Worked examples
Example 1 — Convert 1 dwt to cg:
1 × 155.51738 = 155.51738 cg
Example 2 — Convert 100 dwt to cg:
100 × 155.51738 = 15551.738 cg
Real-world example — Adjacent small-scale precision
One pennyweight equals 1,000 centigrams — the standard sub-millimeter precision conversion that materials engineers use whenever they switch between bulk material thickness specs (larger unit) and surface-finish characteristics (smaller unit).
1 dwt × 155.51738 = 155.51738 cg
Real-world example — Adjacent metric sub-units
One pennyweight equals 1,000 centigrams. Engineers move between these scales constantly: PCB feature sizes in the larger unit, wire-bond diameters in the smaller.
1 dwt × 155.51738 = 155.51738 cg
Pennyweight to Centigram conversion table
Standard reference values for converting pennyweights to centigrams:
| Pennyweight [dwt] | Centigram [cg] |
|---|---|
| 0.01 | 1.5551738 |
| 0.1 | 15.551738 |
| 1 | 155.51738 |
| 2 | 311.03476 |
| 3 | 466.55214 |
| 4 | 622.06952 |
| 5 | 777.5869 |
| 10 | 1555.1738 |
| 20 | 3110.3476 |
| 30 | 4665.5214 |
| 40 | 6220.6952 |
| 50 | 7775.869 |
| 100 | 15551.738 |
| 500 | 77758.69 |
| 1000 | 155517.38 |
Frequently asked questions
How many centigrams is 1 pennyweight?
How do I convert pennyweights to centigrams?
How do I convert centigrams back to pennyweights?
How many centigrams is 100 pennyweights?
Popular weight unit conversions
Convert Pennyweight to other weight units
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Metric / SI (18 units)
Avoirdupois (15 units)
Troy & Apothecary (9 units)
Indian / South Asian (6 units)
Scientific / Atomic (9 units)
Astronomical (4 units)
Biblical / Ancient (14 units)
Sources & references
Conversion factor (1 dwt = 155.51738 cg) verified against the following authoritative sources:
- BIPM — The International System of Units (SI Brochure 9th ed.)
Official BIPM publication defining the seven SI base units (including the meter) and the rules for their use. The global authority on units of measurement.
- NIST — Guide to the SI
US National Institute of Standards and Technology reference covering the SI base and derived units with definitions and usage rules for US technical practice.
- NIST Special Publication 811 — Guide for the Use of the International System of Units
Detailed NIST guide covering exact conversion factors between SI and US customary units along with formatting and rounding conventions.
- NIST — Refinement of values for the yard and pound (Federal Register 1959)
The treaty (signed by US
- International Astronomical Union — System of Astronomical Constants
The IAU defines astronomical units including the AU (149597870700 m exactly) light-year and parsec used in astronomy and astrophysics.