Convert Pound to Pennyweight
Convert pounds to pennyweights instantly. 1 pound = 291.6666741685 pennyweight — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Pennyweight to Pound converter for the reverse conversion.
Units explained
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
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 to Pennyweight conversion formula
The relationship between pounds and pennyweights:
To convert pounds to pennyweights, multiply the value in pounds by 291.6666741685. To reverse, multiply pennyweights by 0.0034285713.
How to use this converter
Type a value into the calculator. The result in pennyweights updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Pennyweight to Pound converter for the reverse direction.
Step-by-step: convert pounds to pennyweights
- Write down the value in pounds (lb).
- Multiply that value by the factor 291.6666741685.
- The product is the equivalent value in pennyweights (dwt).
- To reverse, multiply the pennyweight value by 0.0034285713.
Worked examples
Example 1 — Convert 1 lb to dwt:
1 × 291.6666741685 = 291.6666741685 dwt
Example 2 — Convert 100 lb to dwt:
100 × 291.6666741685 = 29166.6674168508 dwt
Real-world example — Fabric and tailoring
One pound of fabric converts to a value in pennyweights commonly used for seam allowances. Garment patterns frequently switch between the two units on a single instruction sheet.
1 lb × 291.6666741685 = 291.6666741685 dwt
Real-world example — Body height conversion (reverse direction)
You measure 1.75 pounds tall and need to fill in a gym membership form or medical record that asks for height in pennyweights. This is the most-used everyday length conversion in metric-using countries.
1.75 lb × 291.6666741685 = 510.4166797949 dwt
Real-world example — Pet and accessory dimensions
A 3-pound dog leash equals a tidy round value in pennyweights. Pet-supply shopping frequently mixes the two units across product specifications.
3 lb × 291.6666741685 = 875.0000225055 dwt
Pound to Pennyweight conversion table
Standard reference values for converting pounds to pennyweights:
| Pound [lb] | Pennyweight [dwt] |
|---|---|
| 0.01 | 2.9166667417 |
| 0.1 | 29.1666674169 |
| 1 | 291.6666741685 |
| 2 | 583.333348337 |
| 3 | 875.0000225055 |
| 4 | 1166.666696674 |
| 5 | 1458.3333708425 |
| 10 | 2916.6667416851 |
| 20 | 5833.3334833702 |
| 30 | 8750.0002250552 |
| 40 | 11666.6669667403 |
| 50 | 14583.3337084254 |
| 100 | 29166.6674168508 |
| 500 | 145833.3370842538 |
| 1000 | 291666.6741685077 |
Frequently asked questions
How many pennyweights is 1 pound?
How do I convert pounds to pennyweights?
How do I convert pennyweights back to pounds?
How many pennyweights is 100 pounds?
Popular weight unit conversions
Convert Pound to other weight units
Show all Pound conversions
Metric / SI (18 units)
Avoirdupois (14 units)
Troy & Apothecary (10 units)
Indian / South Asian (6 units)
Scientific / Atomic (9 units)
Astronomical (4 units)
Biblical / Ancient (14 units)
Sources & references
Conversion factor (1 lb = 291.6666741685 dwt) 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 Hydrographic Organization — Resolution on the Nautical Mile
International authority that standardised the nautical mile at exactly 1852 m in 1929 — the value adopted worldwide for sea and air navigation.