Mass and Weight · Unit Converter

Convert Dram (apothecary/troy) to Scruple (apothecary)

Convert drams (apothecary/troy) to scruples (apothecary) instantly. 1 dram (apothecary/troy) = 3 scruple (apothecary) — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Scruple (apothecary) to Dram (apothecary/troy) 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

Dram (apothecary/troy)

What is a dram (apothecary/troy)?

The apothecary (troy) dram equals one-eighth of a troy ounce, about 3.888 grams.

Origin of the dram (apothecary/troy)

From the apothecaries' system rooted in the Greek 'drachma'.

Where it is used

Historical pharmacy and medicine compounding.

When and where it was developed

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

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.

Dram (apothecary/troy) to Scruple (apothecary) conversion formula

The relationship between drams (apothecary/troy) and scruples (apothecary):

1 dr ap = 3 s ap
1 s ap = 0.3333333333 dr ap

To convert drams (apothecary/troy) to scruples (apothecary), multiply the value in drams (apothecary/troy) by 3. To reverse, multiply scruples (apothecary) by 0.3333333333.

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 Dram (apothecary/troy) converter for the reverse direction.

Step-by-step: convert drams (apothecary/troy) to scruples (apothecary)

  1. Write down the value in drams (apothecary/troy) (dr ap).
  2. Multiply that value by the factor 3.
  3. The product is the equivalent value in scruples (apothecary) (s ap).
  4. To reverse, multiply the scruple (apothecary) value by 0.3333333333.

Worked examples

Example 1 — Convert 1 dr ap to s ap:
1 × 3 = 3 s ap

Example 2 — Convert 100 dr ap to s ap:
100 × 3 = 300 s ap

Real-world example — Ruler-scale measurements

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

30 dr ap × 3 = 90 s ap

Real-world example — Hardware-scale dimensions

A 10-dram (apothecary/troy) fastener or component is about as long as a thumbnail. Mechanics and DIY enthusiasts convert between drams (apothecary/troy) and scruples (apothecary) daily when mixing metric and imperial tools.

10 dr ap × 3 = 30 s ap

Real-world example — Postcard and small-object dimensions

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

5 dr ap × 3 = 15 s ap

Dram (apothecary/troy) to Scruple (apothecary) conversion table

Standard reference values for converting drams (apothecary/troy) to scruples (apothecary):

Dram (apothecary/troy) [dr ap]Scruple (apothecary) [s ap]
0.010.03
0.10.3
13
26
39
412
515
1030
2060
3090
40120
50150
100300
5001500
10003000

Frequently asked questions

How many scruples (apothecary) is 1 dram (apothecary/troy)?
1 dram (apothecary/troy) equals 3 scruple (apothecary).
How do I convert drams (apothecary/troy) to scruples (apothecary)?
Multiply the value in drams (apothecary/troy) by 3 to get scruples (apothecary).
How do I convert scruples (apothecary) back to drams (apothecary/troy)?
Multiply the value in scruples (apothecary) by 0.3333333333, or use the Scruple (apothecary) to Dram (apothecary/troy) converter.
How many scruples (apothecary) is 100 drams (apothecary/troy)?
100 drams (apothecary/troy) equals 300 scruples (apothecary), because 100 × 3 = 300.

Convert Dram (apothecary/troy) to other weight units

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

Sources & references

Conversion factor (1 dr ap = 3 s ap) verified against the following authoritative sources:

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