Mass and Weight · Unit Converter

Convert Stone (US) to Pennyweight

Convert stones (us) to pennyweights instantly. 1 stone (us) = 3645.8334271063 pennyweight — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Pennyweight to Stone (US) converter for the reverse conversion.

Written by Sunith Babu L, Ph.D., Lead Engineer Reviewed by Dr. Ashok Kumar K, Ph.D.
Mass and Weight category 2 min read Published Last reviewed Updated

Units explained

Avoirdupois

Stone (US)

What is a stone (us)?

A less common US definition of the stone, about 5.67 kilograms.

Origin of the stone (us)

A variant stone weight used in some historical US trade.

Where it is used

Rare; appears mainly in historical or specialized contexts.

When and where it was developed

Derived from older English stone weights that varied by commodity.

Troy & Apothecary

Pennyweight

What is a pennyweight?

The pennyweight (dwt) equals one-twentieth of a troy ounce, 24 grains (about 1.555 g).

Origin of the pennyweight

From the mass of a medieval English silver penny; symbol dwt from 'denarius weight'.

Where it is used

Jewelry making and precious-metal scrap valuation in the US.

When and where it was developed

Derived from the medieval English coinage system.

Stone (US) to Pennyweight conversion formula

The relationship between stones (us) and pennyweights:

1 st = 3645.8334271063 dwt
1 dwt = 0.0002742857 st

To convert stones (us) to pennyweights, multiply the value in stones (us) by 3645.8334271063. To reverse, multiply pennyweights by 0.0002742857.

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 Stone (US) converter for the reverse direction.

Step-by-step: convert stones (us) to pennyweights

  1. Write down the value in stones (us) (st).
  2. Multiply that value by the factor 3645.8334271063.
  3. The product is the equivalent value in pennyweights (dwt).
  4. To reverse, multiply the pennyweight value by 0.0002742857.

Worked examples

Example 1 — Convert 1 st to dwt:
1 × 3645.8334271063 = 3645.8334271063 dwt

Example 2 — Convert 100 st to dwt:
100 × 3645.8334271063 = 364583.3427106346 dwt

Real-world example — Body height conversion (reverse direction)

You measure 1.75 stones (us) 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 st × 3645.8334271063 = 6380.2084974361 dwt

Real-world example — Pet and accessory dimensions

A 3-stone (us) dog leash equals a tidy round value in pennyweights. Pet-supply shopping frequently mixes the two units across product specifications.

3 st × 3645.8334271063 = 10937.500281319 dwt

Real-world example — Fabric and tailoring

One stone (us) 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 st × 3645.8334271063 = 3645.8334271063 dwt

Stone (US) to Pennyweight conversion table

Standard reference values for converting stones (us) to pennyweights:

Stone (US) [st]Pennyweight [dwt]
0.0136.4583342711
0.1364.5833427106
13645.8334271063
27291.6668542127
310937.500281319
414583.3337084254
518229.1671355317
1036458.3342710635
2072916.6685421269
30109375.0028131904
40145833.3370842538
50182291.6713553173
100364583.3427106346
5001822916.7135531732
10003645833.4271063465

Frequently asked questions

How many pennyweights is 1 stone (us)?
1 stone (us) equals 3645.8334271063 pennyweight.
How do I convert stones (us) to pennyweights?
Multiply the value in stones (us) by 3645.8334271063 to get pennyweights.
How do I convert pennyweights back to stones (us)?
Multiply the value in pennyweights by 0.0002742857, or use the Pennyweight to Stone (US) converter.
How many pennyweights is 100 stones (us)?
100 stones (us) equals 364583.3427106346 pennyweights, because 100 × 3645.8334271063 = 364583.3427106346.

Convert Stone (US) to other weight units

Show all Stone (US) conversions
Metric / SI (18 units)
Stone (US) to Attogram (ag) Stone (US) to Femtogram (fg) Stone (US) to Picogram (pg) Stone (US) to Nanogram (ng) Stone (US) to Microgram (µg) Stone (US) to Milligram (mg) Stone (US) to Centigram (cg) Stone (US) to Decigram (dg) Stone (US) to Gram (g) Stone (US) to Dekagram (dag) Stone (US) to Hectogram (hg) Stone (US) to Kilogram (kg) Stone (US) to Quintal (metric) (q) Stone (US) to Metric Ton (t) Stone (US) to Gigagram (Gg) Stone (US) to Teragram (Tg) Stone (US) to Petagram (Pg) Stone (US) to Exagram (Eg)
Avoirdupois (14 units)
Stone (US) to Grain (gr) Stone (US) to Dram (avoirdupois) (dr) Stone (US) to Ounce (oz) Stone (US) to Pound (lb) Stone (US) to Clove (clove) Stone (US) to Stone (UK) (st) Stone (US) to Quarter (US) (qr) Stone (US) to Quarter (UK) (qr) Stone (US) to Hundredweight (US) (cwt) Stone (US) to Hundredweight (UK) (cwt) Stone (US) to Wey (wey) Stone (US) to Kilopound (kip) (kip) Stone (US) to Ton (short, US) (sh tn) Stone (US) to Ton (long, UK) (long tn)
Troy & Apothecary (10 units)
Stone (US) to Point (1/100 carat) (pt) Stone (US) to Carat (metric) (ct) Stone (US) to Scruple (apothecary) (s ap) Stone (US) to Pennyweight (dwt) Stone (US) to Momme (mom) Stone (US) to Mace (mace) Stone (US) to Dram (apothecary/troy) (dr ap) Stone (US) to Troy Ounce (oz t) Stone (US) to Tael (tael) Stone (US) to Pound (troy/apothecary) (lb t)
Indian / South Asian (6 units)
Stone (US) to Ratti (ratti) Stone (US) to Masha (masha) Stone (US) to Tola (tola) Stone (US) to Chittack (Chatank) (chittack) Stone (US) to Seer (Ser) (seer) Stone (US) to Maund (Mann) (maund)
Scientific / Atomic (9 units)
Stone (US) to Electron Mass (rest) (me) Stone (US) to MeV/c2 (MeV/c²) Stone (US) to Muon Mass (mµ) Stone (US) to Atomic Mass Unit (u) Stone (US) to Proton Mass (mp) Stone (US) to Neutron Mass (mn) Stone (US) to Deuteron Mass (md) Stone (US) to Carbon-12 Atom Mass (C-12) Stone (US) to Planck Mass (mP)
Astronomical (4 units)
Stone (US) to Lunar Mass (Moon) (M☾) Stone (US) to Earth's Mass (M⊕) Stone (US) to Jupiter Mass (MJ) Stone (US) to Sun's Mass (M☉)
Biblical / Ancient (14 units)
Stone (US) to Lepton (Biblical Roman) (lepton) Stone (US) to Quadrans (Biblical Roman) (quadrans) Stone (US) to Assarion (Biblical Roman) (assarion) Stone (US) to Gerah (Biblical Hebrew) (gerah) Stone (US) to Drachma (Biblical Greek) (drachma) Stone (US) to Denarius (Biblical Roman) (denarius) Stone (US) to Bekan (Biblical Hebrew) (bekah) Stone (US) to Didrachma (Biblical Greek) (didrachma) Stone (US) to Shekel (Biblical Hebrew) (shekel) Stone (US) to Tetradrachma (Biblical Greek) (tetra) Stone (US) to Mina (Biblical Greek) (mina) Stone (US) to Mina (Biblical Hebrew) (mina) Stone (US) to Talent (Biblical Greek) (talent) Stone (US) to Talent (Biblical Hebrew) (talent)
Force / Engineering (5 units)
Stone (US) to Poundal (pdl) Stone (US) to Ton (assay) (US) (AT) Stone (US) to Ton (assay) (UK) (AT) Stone (US) to Kilogram-force square second/meter (hyl) Stone (US) to Slug (slug)

Sources & references

Conversion factor (1 st = 3645.8334271063 dwt) verified against the following authoritative sources:

Results are provided for general reference. Verify critical measurements against an authoritative standard.