Mass and Weight · Unit Converter

Convert Dram (apothecary/troy) to Quadrans (Biblical Roman)

Convert drams (apothecary/troy) to quadranses (biblical roman) instantly. 1 dram (apothecary/troy) = 64.630547424 quadrans (biblical roman) — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Quadrans (Biblical Roman) 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.

Biblical / Ancient

Quadrans (Biblical Roman)

What is a quadrans (biblical roman)?

The quadrans was a quarter of an as, about 0.06 gram in this scale.

Origin of the quadrans (biblical roman)

From Latin 'quadrans', a quarter part.

Where it is used

Roman small change referenced in scripture.

When and where it was developed

A minor Roman bronze denomination.

Dram (apothecary/troy) to Quadrans (Biblical Roman) conversion formula

Note: this conversion uses a generally accepted modern value. Historical and regional definitions of this unit varied across times and places.

The relationship between drams (apothecary/troy) and quadranses (biblical roman):

1 dr ap = 64.630547424 quadrans
1 quadrans = 0.0154725596 dr ap

To convert drams (apothecary/troy) to quadranses (biblical roman), multiply the value in drams (apothecary/troy) by 64.630547424. To reverse, multiply quadranses (biblical roman) by 0.0154725596.

How to use this converter

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

Step-by-step: convert drams (apothecary/troy) to quadranses (biblical roman)

  1. Write down the value in drams (apothecary/troy) (dr ap).
  2. Multiply that value by the factor 64.630547424.
  3. The product is the equivalent value in quadranses (biblical roman) (quadrans).
  4. To reverse, multiply the quadrans (biblical roman) value by 0.0154725596.

Worked examples

Example 1 — Convert 1 dr ap to quadrans:
1 × 64.630547424 = 64.630547424 quadrans

Example 2 — Convert 100 dr ap to quadrans:
100 × 64.630547424 = 6463.0547423961 quadrans

Real-world example — Adjacent metric sub-units

One dram (apothecary/troy) equals 1,000 quadranses (biblical roman). Engineers move between these scales constantly: PCB feature sizes in the larger unit, wire-bond diameters in the smaller.

1 dr ap × 64.630547424 = 64.630547424 quadrans

Real-world example — Adjacent small-scale precision

One dram (apothecary/troy) equals 1,000 quadranses (biblical roman) — the standard sub-millimeter precision conversion that materials engineers use whenever they switch between bulk material thickness specs (larger unit) and surface-finish characteristics (smaller unit).

1 dr ap × 64.630547424 = 64.630547424 quadrans

Dram (apothecary/troy) to Quadrans (Biblical Roman) conversion table

Standard reference values for converting drams (apothecary/troy) to quadranses (biblical roman):

Dram (apothecary/troy) [dr ap]Quadrans (Biblical Roman) [quadrans]
0.010.6463054742
0.16.4630547424
164.630547424
2129.2610948479
3193.8916422719
4258.5221896958
5323.1527371198
10646.3054742396
201292.6109484792
301938.9164227188
402585.2218969584
503231.527371198
1006463.0547423961
50032315.2737119803
100064630.5474239606

Frequently asked questions

How many quadranses (biblical roman) is 1 dram (apothecary/troy)?
1 dram (apothecary/troy) equals 64.630547424 quadrans (biblical roman).
How do I convert drams (apothecary/troy) to quadranses (biblical roman)?
Multiply the value in drams (apothecary/troy) by 64.630547424 to get quadranses (biblical roman).
How do I convert quadranses (biblical roman) back to drams (apothecary/troy)?
Multiply the value in quadranses (biblical roman) by 0.0154725596, or use the Quadrans (Biblical Roman) to Dram (apothecary/troy) converter.
How many quadranses (biblical roman) is 100 drams (apothecary/troy)?
100 drams (apothecary/troy) equals 6463.0547423961 quadranses (biblical roman), because 100 × 64.630547424 = 6463.0547423961.

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 = 64.630547424 quadrans) verified against the following authoritative sources:

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