Mass and Weight · Unit Converter

Convert Dram (apothecary/troy) to Tael

Convert drams (apothecary/troy) to taels instantly. 1 dram (apothecary/troy) = 0.1028571542 tael — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Tael 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

Tael

What is a tael?

The tael equals about 37.8 grams (ten mace).

Origin of the tael

From Malay 'tahil'; the Chinese unit is the 'liang'.

Where it is used

East Asian precious-metal and traditional-medicine commerce.

When and where it was developed

A long-standing East Asian trade weight, with regional variants.

Dram (apothecary/troy) to Tael 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 taels:

1 dr ap = 0.1028571542 tael
1 tael = 9.7222211505 dr ap

To convert drams (apothecary/troy) to taels, multiply the value in drams (apothecary/troy) by 0.1028571542. To reverse, multiply taels by 9.7222211505.

How to use this converter

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

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

  1. Write down the value in drams (apothecary/troy) (dr ap).
  2. Multiply that value by the factor 0.1028571542.
  3. The product is the equivalent value in taels (tael).
  4. To reverse, multiply the tael value by 9.7222211505.

Worked examples

Example 1 — Convert 1 dr ap to tael:
1 × 0.1028571542 = 0.1028571542 tael

Example 2 — Convert 100 dr ap to tael:
100 × 0.1028571542 = 10.2857154195 tael

Real-world example — Postcard and small-object dimensions

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

5 dr ap × 0.1028571542 = 0.514285771 tael

Real-world example — Ruler-scale measurements

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

30 dr ap × 0.1028571542 = 3.0857146259 tael

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 taels daily when mixing metric and imperial tools.

10 dr ap × 0.1028571542 = 1.028571542 tael

Dram (apothecary/troy) to Tael conversion table

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

Dram (apothecary/troy) [dr ap]Tael [tael]
0.010.0010285715
0.10.0102857154
10.1028571542
20.2057143084
30.3085714626
40.4114286168
50.514285771
101.028571542
202.0571430839
303.0857146259
404.1142861678
505.1428577098
10010.2857154195
50051.4285770976
1000102.8571541952

Frequently asked questions

How many taels is 1 dram (apothecary/troy)?
1 dram (apothecary/troy) equals 0.1028571542 tael.
How do I convert drams (apothecary/troy) to taels?
Multiply the value in drams (apothecary/troy) by 0.1028571542 to get taels.
How do I convert taels back to drams (apothecary/troy)?
Multiply the value in taels by 9.7222211505, or use the Tael to Dram (apothecary/troy) converter.
How many taels is 100 drams (apothecary/troy)?
100 drams (apothecary/troy) equals 10.2857154195 taels, because 100 × 0.1028571542 = 10.2857154195.

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 = 0.1028571542 tael) verified against the following authoritative sources:

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