Mass and Weight · Unit Converter

Convert Pennyweight to Scruple (apothecary)

Convert pennyweights to scruples (apothecary) instantly. 1 pennyweight = 1.1999999691 scruple (apothecary) — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Scruple (apothecary) to Pennyweight 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

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.

Troy & Apothecary

Scruple (apothecary)

What is a scruple (apothecary)?

The apothecary scruple equals 20 grains, about 1.296 grams.

Origin of the scruple (apothecary)

From Latin 'scrupulus', a small sharp pebble used as a tiny weight.

Where it is used

Historical apothecary dosing of powders.

When and where it was developed

Part of the apothecaries' system used through the 19th century.

Pennyweight to Scruple (apothecary) conversion formula

The relationship between pennyweights and scruples (apothecary):

1 dwt = 1.1999999691 s ap
1 s ap = 0.8333333548 dwt

To convert pennyweights to scruples (apothecary), multiply the value in pennyweights by 1.1999999691. To reverse, multiply scruples (apothecary) by 0.8333333548.

How to use this converter

Type a value into the calculator. The result in scruples (apothecary) updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Scruple (apothecary) to Pennyweight converter for the reverse direction.

Step-by-step: convert pennyweights to scruples (apothecary)

  1. Write down the value in pennyweights (dwt).
  2. Multiply that value by the factor 1.1999999691.
  3. The product is the equivalent value in scruples (apothecary) (s ap).
  4. To reverse, multiply the scruple (apothecary) value by 0.8333333548.

Worked examples

Example 1 — Convert 1 dwt to s ap:
1 × 1.1999999691 = 1.1999999691 s ap

Example 2 — Convert 100 dwt to s ap:
100 × 1.1999999691 = 119.9999969135 s ap

Real-world example — Ruler-scale measurements

A 30-pennyweight school ruler converts cleanly to scruples (apothecary) — useful when buying a desk accessory from a retailer whose product specs use a different unit.

30 dwt × 1.1999999691 = 35.9999990741 s ap

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 scruples (apothecary) daily when mixing metric and imperial tools.

10 dwt × 1.1999999691 = 11.9999996914 s ap

Real-world example — Postcard and small-object dimensions

A postcard is about 5 pennyweights wide. Converting to scruples (apothecary) is essential for international postal addressing forms that ask for dimensions in different units across countries.

5 dwt × 1.1999999691 = 5.9999998457 s ap

Pennyweight to Scruple (apothecary) conversion table

Standard reference values for converting pennyweights to scruples (apothecary):

Pennyweight [dwt]Scruple (apothecary) [s ap]
0.010.0119999997
0.10.1199999969
11.1999999691
22.3999999383
33.5999999074
44.7999998765
55.9999998457
1011.9999996914
2023.9999993827
3035.9999990741
4047.9999987654
5059.9999984568
100119.9999969135
500599.9999845676
10001199.9999691353

Frequently asked questions

How many scruples (apothecary) is 1 pennyweight?
1 pennyweight equals 1.1999999691 scruple (apothecary).
How do I convert pennyweights to scruples (apothecary)?
Multiply the value in pennyweights by 1.1999999691 to get scruples (apothecary).
How do I convert scruples (apothecary) back to pennyweights?
Multiply the value in scruples (apothecary) by 0.8333333548, or use the Scruple (apothecary) to Pennyweight converter.
How many scruples (apothecary) is 100 pennyweights?
100 pennyweights equals 119.9999969135 scruples (apothecary), because 100 × 1.1999999691 = 119.9999969135.

Convert Pennyweight to other weight units

Show all Pennyweight conversions
Metric / SI (18 units)
Pennyweight to Attogram (ag) Pennyweight to Femtogram (fg) Pennyweight to Picogram (pg) Pennyweight to Nanogram (ng) Pennyweight to Microgram (µg) Pennyweight to Milligram (mg) Pennyweight to Centigram (cg) Pennyweight to Decigram (dg) Pennyweight to Gram (g) Pennyweight to Dekagram (dag) Pennyweight to Hectogram (hg) Pennyweight to Kilogram (kg) Pennyweight to Quintal (metric) (q) Pennyweight to Metric Ton (t) Pennyweight to Gigagram (Gg) Pennyweight to Teragram (Tg) Pennyweight to Petagram (Pg) Pennyweight to Exagram (Eg)
Avoirdupois (15 units)
Pennyweight to Grain (gr) Pennyweight to Dram (avoirdupois) (dr) Pennyweight to Ounce (oz) Pennyweight to Pound (lb) Pennyweight to Clove (clove) Pennyweight to Stone (US) (st) Pennyweight to Stone (UK) (st) Pennyweight to Quarter (US) (qr) Pennyweight to Quarter (UK) (qr) Pennyweight to Hundredweight (US) (cwt) Pennyweight to Hundredweight (UK) (cwt) Pennyweight to Wey (wey) Pennyweight to Kilopound (kip) (kip) Pennyweight to Ton (short, US) (sh tn) Pennyweight to Ton (long, UK) (long tn)
Troy & Apothecary (9 units)
Pennyweight to Point (1/100 carat) (pt) Pennyweight to Carat (metric) (ct) Pennyweight to Scruple (apothecary) (s ap) Pennyweight to Momme (mom) Pennyweight to Mace (mace) Pennyweight to Dram (apothecary/troy) (dr ap) Pennyweight to Troy Ounce (oz t) Pennyweight to Tael (tael) Pennyweight to Pound (troy/apothecary) (lb t)
Indian / South Asian (6 units)
Pennyweight to Ratti (ratti) Pennyweight to Masha (masha) Pennyweight to Tola (tola) Pennyweight to Chittack (Chatank) (chittack) Pennyweight to Seer (Ser) (seer) Pennyweight to Maund (Mann) (maund)
Scientific / Atomic (9 units)
Pennyweight to Electron Mass (rest) (me) Pennyweight to MeV/c2 (MeV/c²) Pennyweight to Muon Mass (mµ) Pennyweight to Atomic Mass Unit (u) Pennyweight to Proton Mass (mp) Pennyweight to Neutron Mass (mn) Pennyweight to Deuteron Mass (md) Pennyweight to Carbon-12 Atom Mass (C-12) Pennyweight to Planck Mass (mP)
Astronomical (4 units)
Pennyweight to Lunar Mass (Moon) (M☾) Pennyweight to Earth's Mass (M⊕) Pennyweight to Jupiter Mass (MJ) Pennyweight to Sun's Mass (M☉)
Biblical / Ancient (14 units)
Pennyweight to Lepton (Biblical Roman) (lepton) Pennyweight to Quadrans (Biblical Roman) (quadrans) Pennyweight to Assarion (Biblical Roman) (assarion) Pennyweight to Gerah (Biblical Hebrew) (gerah) Pennyweight to Drachma (Biblical Greek) (drachma) Pennyweight to Denarius (Biblical Roman) (denarius) Pennyweight to Bekan (Biblical Hebrew) (bekah) Pennyweight to Didrachma (Biblical Greek) (didrachma) Pennyweight to Shekel (Biblical Hebrew) (shekel) Pennyweight to Tetradrachma (Biblical Greek) (tetra) Pennyweight to Mina (Biblical Greek) (mina) Pennyweight to Mina (Biblical Hebrew) (mina) Pennyweight to Talent (Biblical Greek) (talent) Pennyweight to Talent (Biblical Hebrew) (talent)
Force / Engineering (5 units)
Pennyweight to Poundal (pdl) Pennyweight to Ton (assay) (US) (AT) Pennyweight to Ton (assay) (UK) (AT) Pennyweight to Kilogram-force square second/meter (hyl) Pennyweight to Slug (slug)

Sources & references

Conversion factor (1 dwt = 1.1999999691 s ap) verified against the following authoritative sources:

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