Convert Pennyweight to Stone (US)
Convert pennyweights to stones (us) instantly. 1 pennyweight = 0.0002742857 stone (us) — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Stone (US) 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.
Stone (US)
A less common US definition of the stone, about 5.67 kilograms.
A variant stone weight used in some historical US trade.
Rare; appears mainly in historical or specialized contexts.
Derived from older English stone weights that varied by commodity.
Pennyweight to Stone (US) conversion formula
The relationship between pennyweights and stones (us):
To convert pennyweights to stones (us), multiply the value in pennyweights by 0.0002742857. To reverse, multiply stones (us) by 3645.8334271063.
How to use this converter
Type a value into the calculator. The result in stones (us) updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Stone (US) to Pennyweight converter for the reverse direction.
Step-by-step: convert pennyweights to stones (us)
- Write down the value in pennyweights (dwt).
- Multiply that value by the factor 0.0002742857.
- The product is the equivalent value in stones (us) (st).
- To reverse, multiply the stone (us) value by 3645.8334271063.
Worked examples
Example 1 — Convert 1 dwt to st:
1 × 0.0002742857 = 0.0002742857 st
Example 2 — Convert 100 dwt to st:
100 × 0.0002742857 = 0.0274285707 st
Real-world example — Children's height milestones
A 150-pennyweight-tall child measures a value in stones (us) that's commonly used for theme-park ride height requirements when travelling between countries that use different measurement units.
150 dwt × 0.0002742857 = 0.0411428561 st
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 stones (us) — converting between these adjacent units is one of the most-used length conversions globally.
180 dwt × 0.0002742857 = 0.0493714273 st
Real-world example — Furniture and large objects
A 72-pennyweight piece of furniture converts to a value in stones (us) 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 × 0.0002742857 = 0.0197485709 st
Pennyweight to Stone (US) conversion table
Standard reference values for converting pennyweights to stones (us):
| Pennyweight [dwt] | Stone (US) [st] |
|---|---|
| 0.01 | 2.742857e-6 |
| 0.1 | 2.742857e-5 |
| 1 | 0.0002742857 |
| 2 | 0.0005485714 |
| 3 | 0.0008228571 |
| 4 | 0.0010971428 |
| 5 | 0.0013714285 |
| 10 | 0.0027428571 |
| 20 | 0.0054857141 |
| 30 | 0.0082285712 |
| 40 | 0.0109714283 |
| 50 | 0.0137142854 |
| 100 | 0.0274285707 |
| 500 | 0.1371428536 |
| 1000 | 0.2742857072 |
Frequently asked questions
How many stones (us) is 1 pennyweight?
How do I convert pennyweights to stones (us)?
How do I convert stones (us) back to pennyweights?
How many stones (us) 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 = 0.0002742857 st) 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.