Mass and Weight · Unit Converter

Convert Quarter (US) to Dram (apothecary/troy)

Convert quarters (us) to drams (apothecary/troy) instantly. 1 quarter (us) = 2916.6666666667 dram (apothecary/troy) — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Dram (apothecary/troy) to Quarter (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

Quarter (US)

What is a quarter (us)?

The US quarter equals one-fourth of a short hundredweight, 25 pounds (about 11.34 kg).

Origin of the quarter (us)

A 'quarter' of the US short hundredweight.

Where it is used

US agricultural and commodity weighing.

When and where it was developed

Defined within the US customary hundredweight system.

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.

Quarter (US) to Dram (apothecary/troy) conversion formula

The relationship between quarters (us) and drams (apothecary/troy):

1 qr = 2916.6666666667 dr ap
1 dr ap = 0.0003428571 qr

To convert quarters (us) to drams (apothecary/troy), multiply the value in quarters (us) by 2916.6666666667. To reverse, multiply drams (apothecary/troy) by 0.0003428571.

How to use this converter

Type a value into the calculator. The result in drams (apothecary/troy) updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Dram (apothecary/troy) to Quarter (US) converter for the reverse direction.

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

  1. Write down the value in quarters (us) (qr).
  2. Multiply that value by the factor 2916.6666666667.
  3. The product is the equivalent value in drams (apothecary/troy) (dr ap).
  4. To reverse, multiply the dram (apothecary/troy) value by 0.0003428571.

Worked examples

Example 1 — Convert 1 qr to dr ap:
1 × 2916.6666666667 = 2916.6666666667 dr ap

Example 2 — Convert 100 qr to dr ap:
100 × 2916.6666666667 = 291666.6666666666 dr ap

Quarter (US) to Dram (apothecary/troy) conversion table

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

Quarter (US) [qr]Dram (apothecary/troy) [dr ap]
0.0129.1666666667
0.1291.6666666667
12916.6666666667
25833.3333333333
38750
411666.6666666667
514583.3333333333
1029166.6666666667
2058333.3333333333
3087500
40116666.6666666667
50145833.3333333333
100291666.6666666666
5001458333.3333333333
10002916666.6666666665

Frequently asked questions

How many drams (apothecary/troy) is 1 quarter (us)?
1 quarter (us) equals 2916.6666666667 dram (apothecary/troy).
How do I convert quarters (us) to drams (apothecary/troy)?
Multiply the value in quarters (us) by 2916.6666666667 to get drams (apothecary/troy).
How do I convert drams (apothecary/troy) back to quarters (us)?
Multiply the value in drams (apothecary/troy) by 0.0003428571, or use the Dram (apothecary/troy) to Quarter (US) converter.
How many drams (apothecary/troy) is 100 quarters (us)?
100 quarters (us) equals 291666.6666666666 drams (apothecary/troy), because 100 × 2916.6666666667 = 291666.6666666666.

Convert Quarter (US) to other weight units

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

Sources & references

Conversion factor (1 qr = 2916.6666666667 dr ap) verified against the following authoritative sources:

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