Convert Pennyweight to Hundredweight (UK)
Convert pennyweights to hundredweights (uk) instantly. 1 pennyweight = 3.061224e-5 hundredweight (uk) — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Hundredweight (UK) 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.
Hundredweight (UK)
The UK (long) hundredweight equals 112 pounds, about 50.8 kilograms.
Originally a 'hundred'-pound trade weight, later fixed at 112 lb in Britain.
UK trade, shipping, and agriculture.
Standardized at 112 pounds in the imperial system.
Pennyweight to Hundredweight (UK) conversion formula
The relationship between pennyweights and hundredweights (uk):
To convert pennyweights to hundredweights (uk), multiply the value in pennyweights by 3.061224e-5. To reverse, multiply hundredweights (uk) by 32666.6675068729.
How to use this converter
Type a value into the calculator. The result in hundredweights (uk) updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Hundredweight (UK) to Pennyweight converter for the reverse direction.
Step-by-step: convert pennyweights to hundredweights (uk)
- Write down the value in pennyweights (dwt).
- Multiply that value by the factor 3.061224e-5.
- The product is the equivalent value in hundredweights (uk) (cwt).
- To reverse, multiply the hundredweight (uk) value by 32666.6675068729.
Worked examples
Example 1 — Convert 1 dwt to cwt:
1 × 3.061224e-5 = 3.061224e-5 cwt
Example 2 — Convert 100 dwt to cwt:
100 × 3.061224e-5 = 0.0030612244 cwt
Real-world example — Ruler-scale measurements
A 30-pennyweight school ruler converts cleanly to hundredweights (uk) — useful when buying a desk accessory from a retailer whose product specs use a different unit.
30 dwt × 3.061224e-5 = 0.0009183673 cwt
Real-world example — Hardware-scale dimensions
A 10-pennyweight fastener or component is about as long as a thumbnail. Mechanics and DIY enthusiasts convert between pennyweights and hundredweights (uk) daily when mixing metric and imperial tools.
10 dwt × 3.061224e-5 = 0.0003061224 cwt
Real-world example — Postcard and small-object dimensions
A postcard is about 5 pennyweights wide. Converting to hundredweights (uk) is essential for international postal addressing forms that ask for dimensions in different units across countries.
5 dwt × 3.061224e-5 = 0.0001530612 cwt
Pennyweight to Hundredweight (UK) conversion table
Standard reference values for converting pennyweights to hundredweights (uk):
| Pennyweight [dwt] | Hundredweight (UK) [cwt] |
|---|---|
| 0.01 | 3.061224e-7 |
| 0.1 | 3.061224e-6 |
| 1 | 3.061224e-5 |
| 2 | 6.122449e-5 |
| 3 | 9.183673e-5 |
| 4 | 0.000122449 |
| 5 | 0.0001530612 |
| 10 | 0.0003061224 |
| 20 | 0.0006122449 |
| 30 | 0.0009183673 |
| 40 | 0.0012244898 |
| 50 | 0.0015306122 |
| 100 | 0.0030612244 |
| 500 | 0.0153061221 |
| 1000 | 0.0306122441 |
Frequently asked questions
How many hundredweights (uk) is 1 pennyweight?
How do I convert pennyweights to hundredweights (uk)?
How do I convert hundredweights (uk) back to pennyweights?
How many hundredweights (uk) is 100 pennyweights?
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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 = 3.061224e-5 cwt) 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.