Convert Momme to Dram (avoirdupois)
Convert mommes to drams (avoirdupois) instantly. 1 momme = 2.1164377114 dram (avoirdupois) — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Dram (avoirdupois) to Momme converter for the reverse conversion.
Units explained
Momme
The momme (mom) equals 3.75 grams.
A traditional Japanese mass unit (Japanese 'monme').
Pearls, and as the standard weight grade for silk fabric.
Part of the traditional Japanese shakkanho system.
Dram (avoirdupois)
The avoirdupois dram (dr) equals one-sixteenth of an ounce, about 1.77 grams.
From Greek 'drachma' through Latin 'dragma'.
Historically pharmacy; today occasional cooking and firearms (powder) use.
Defined as 1/256 of the avoirdupois pound.
Momme to Dram (avoirdupois) 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 mommes and drams (avoirdupois):
To convert mommes to drams (avoirdupois), multiply the value in mommes by 2.1164377114. To reverse, multiply drams (avoirdupois) by 0.4724920533.
How to use this converter
Type a value into the calculator. The result in drams (avoirdupois) 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 (avoirdupois) to Momme converter for the reverse direction.
Step-by-step: convert mommes to drams (avoirdupois)
- Write down the value in mommes (mom).
- Multiply that value by the factor 2.1164377114.
- The product is the equivalent value in drams (avoirdupois) (dr).
- To reverse, multiply the dram (avoirdupois) value by 0.4724920533.
Worked examples
Example 1 — Convert 1 mom to dr:
1 × 2.1164377114 = 2.1164377114 dr
Example 2 — Convert 100 mom to dr:
100 × 2.1164377114 = 211.6437711376 dr
Real-world example — Hardware-scale dimensions
A 10-momme fastener or component is about as long as a thumbnail. Mechanics and DIY enthusiasts convert between mommes and drams (avoirdupois) daily when mixing metric and imperial tools.
10 mom × 2.1164377114 = 21.1643771138 dr
Real-world example — Postcard and small-object dimensions
A postcard is about 5 mommes wide. Converting to drams (avoirdupois) is essential for international postal addressing forms that ask for dimensions in different units across countries.
5 mom × 2.1164377114 = 10.5821885569 dr
Real-world example — Ruler-scale measurements
A 30-momme school ruler converts cleanly to drams (avoirdupois) — useful when buying a desk accessory from a retailer whose product specs use a different unit.
30 mom × 2.1164377114 = 63.4931313413 dr
Momme to Dram (avoirdupois) conversion table
Standard reference values for converting mommes to drams (avoirdupois):
| Momme [mom] | Dram (avoirdupois) [dr] |
|---|---|
| 0.01 | 0.0211643771 |
| 0.1 | 0.2116437711 |
| 1 | 2.1164377114 |
| 2 | 4.2328754228 |
| 3 | 6.3493131341 |
| 4 | 8.4657508455 |
| 5 | 10.5821885569 |
| 10 | 21.1643771138 |
| 20 | 42.3287542275 |
| 30 | 63.4931313413 |
| 40 | 84.657508455 |
| 50 | 105.8218855688 |
| 100 | 211.6437711376 |
| 500 | 1058.2188556878 |
| 1000 | 2116.4377113757 |
Frequently asked questions
How many drams (avoirdupois) is 1 momme?
How do I convert mommes to drams (avoirdupois)?
How do I convert drams (avoirdupois) back to mommes?
How many drams (avoirdupois) is 100 mommes?
Popular weight unit conversions
Convert Momme to other weight units
Show all Momme conversions
Metric / SI (18 units)
Avoirdupois (15 units)
Troy & Apothecary (9 units)
Indian / South Asian (6 units)
Scientific / Atomic (9 units)
Astronomical (4 units)
Biblical / Ancient (14 units)
Sources & references
Conversion factor (1 mom = 2.1164377114 dr) verified against the following authoritative sources:
- BIPM — The International System of Units (SI Brochure 9th ed.)
Official BIPM publication defining the seven SI base units (including the meter) and the rules for their use. The global authority on units of measurement.
- NIST — Guide to the SI
US National Institute of Standards and Technology reference covering the SI base and derived units with definitions and usage rules for US technical practice.
- NIST Special Publication 811 — Guide for the Use of the International System of Units
Detailed NIST guide covering exact conversion factors between SI and US customary units along with formatting and rounding conventions.
- NIST — Refinement of values for the yard and pound (Federal Register 1959)
The treaty (signed by US
- International Hydrographic Organization — Resolution on the Nautical Mile
International authority that standardised the nautical mile at exactly 1852 m in 1929 — the value adopted worldwide for sea and air navigation.