Convert Pennyweight to Pound
Convert pennyweights to pounds instantly. 1 pennyweight = 0.0034285713 pound — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Pound 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.
Pound
The pound (lb) is a unit of mass equal to exactly 0.45359237 kilogram.
From Latin 'libra pondo' (a pound by weight); the symbol lb comes from 'libra'.
The primary weight unit in the United States and informally in the UK.
The international avoirdupois pound was fixed in the 1959 yard-and-pound agreement.
Pennyweight to Pound conversion formula
The relationship between pennyweights and pounds:
To convert pennyweights to pounds, multiply the value in pennyweights by 0.0034285713. To reverse, multiply pounds by 291.6666741685.
How to use this converter
Type a value into the calculator. The result in pounds updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Pound to Pennyweight converter for the reverse direction.
Step-by-step: convert pennyweights to pounds
- Write down the value in pennyweights (dwt).
- Multiply that value by the factor 0.0034285713.
- The product is the equivalent value in pounds (lb).
- To reverse, multiply the pound value by 291.6666741685.
Worked examples
Example 1 — Convert 1 dwt to lb:
1 × 0.0034285713 = 0.0034285713 lb
Example 2 — Convert 100 dwt to lb:
100 × 0.0034285713 = 0.342857134 lb
Real-world example — Body height conversion
You enter your height as 180 pennyweights into an international job or visa application. The form then asks for the same value in pounds — converting between these adjacent units is one of the most-used length conversions globally.
180 dwt × 0.0034285713 = 0.6171428413 lb
Real-world example — Furniture and large objects
A 72-pennyweight piece of furniture converts to a value in pounds that's easier to mentally compare with room dimensions. This is the typical workflow when shopping internationally and product specs use a different unit than your room measurements.
72 dwt × 0.0034285713 = 0.2468571365 lb
Real-world example — Children's height milestones
A 150-pennyweight-tall child measures a value in pounds that's commonly used for theme-park ride height requirements when travelling between countries that use different measurement units.
150 dwt × 0.0034285713 = 0.5142857011 lb
Pennyweight to Pound conversion table
Standard reference values for converting pennyweights to pounds:
| Pennyweight [dwt] | Pound [lb] |
|---|---|
| 0.01 | 3.428571e-5 |
| 0.1 | 0.0003428571 |
| 1 | 0.0034285713 |
| 2 | 0.0068571427 |
| 3 | 0.010285714 |
| 4 | 0.0137142854 |
| 5 | 0.0171428567 |
| 10 | 0.0342857134 |
| 20 | 0.0685714268 |
| 30 | 0.1028571402 |
| 40 | 0.1371428536 |
| 50 | 0.171428567 |
| 100 | 0.342857134 |
| 500 | 1.7142856702 |
| 1000 | 3.4285713404 |
Frequently asked questions
How many pounds is 1 pennyweight?
How do I convert pennyweights to pounds?
How do I convert pounds back to pennyweights?
How many pounds is 100 pennyweights?
Popular weight unit conversions
Convert Pennyweight to other weight units
Show all Pennyweight conversions
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 = 0.0034285713 lb) 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.