Mass and Weight · Unit Converter

Convert Dram (apothecary/troy) to Momme

Convert drams (apothecary/troy) to mommes instantly. 1 dram (apothecary/troy) = 1.03678256 momme — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Momme 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

Momme

What is a momme?

The momme (mom) equals 3.75 grams.

Origin of the momme

A traditional Japanese mass unit (Japanese 'monme').

Where it is used

Pearls, and as the standard weight grade for silk fabric.

When and where it was developed

Part of the traditional Japanese shakkanho system.

Dram (apothecary/troy) to Momme 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 mommes:

1 dr ap = 1.03678256 mom
1 mom = 0.9645223971 dr ap

To convert drams (apothecary/troy) to mommes, multiply the value in drams (apothecary/troy) by 1.03678256. To reverse, multiply mommes by 0.9645223971.

How to use this converter

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

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

  1. Write down the value in drams (apothecary/troy) (dr ap).
  2. Multiply that value by the factor 1.03678256.
  3. The product is the equivalent value in mommes (mom).
  4. To reverse, multiply the momme value by 0.9645223971.

Worked examples

Example 1 — Convert 1 dr ap to mom:
1 × 1.03678256 = 1.03678256 mom

Example 2 — Convert 100 dr ap to mom:
100 × 1.03678256 = 103.678256 mom

Real-world example — Postcard and small-object dimensions

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

5 dr ap × 1.03678256 = 5.1839128 mom

Real-world example — Ruler-scale measurements

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

30 dr ap × 1.03678256 = 31.1034768 mom

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 mommes daily when mixing metric and imperial tools.

10 dr ap × 1.03678256 = 10.3678256 mom

Dram (apothecary/troy) to Momme conversion table

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

Dram (apothecary/troy) [dr ap]Momme [mom]
0.010.0103678256
0.10.103678256
11.03678256
22.07356512
33.11034768
44.14713024
55.1839128
1010.3678256
2020.7356512
3031.1034768
4041.4713024
5051.839128
100103.678256
500518.39128
10001036.78256

Frequently asked questions

How many mommes is 1 dram (apothecary/troy)?
1 dram (apothecary/troy) equals 1.03678256 momme.
How do I convert drams (apothecary/troy) to mommes?
Multiply the value in drams (apothecary/troy) by 1.03678256 to get mommes.
How do I convert mommes back to drams (apothecary/troy)?
Multiply the value in mommes by 0.9645223971, or use the Momme to Dram (apothecary/troy) converter.
How many mommes is 100 drams (apothecary/troy)?
100 drams (apothecary/troy) equals 103.678256 mommes, because 100 × 1.03678256 = 103.678256.

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 = 1.03678256 mom) verified against the following authoritative sources:

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