Convert Momme to Pennyweight
Convert mommes to pennyweights instantly. 1 momme = 2.4113060547 pennyweight — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Pennyweight 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.
Pennyweight
The pennyweight (dwt) equals one-twentieth of a troy ounce, 24 grains (about 1.555 g).
From the mass of a medieval English silver penny; symbol dwt from 'denarius weight'.
Jewelry making and precious-metal scrap valuation in the US.
Derived from the medieval English coinage system.
Momme to Pennyweight 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 pennyweights:
To convert mommes to pennyweights, multiply the value in mommes by 2.4113060547. To reverse, multiply pennyweights by 0.4147130133.
How to use this converter
Type a value into the calculator. The result in pennyweights updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Pennyweight to Momme converter for the reverse direction.
Step-by-step: convert mommes to pennyweights
- Write down the value in mommes (mom).
- Multiply that value by the factor 2.4113060547.
- The product is the equivalent value in pennyweights (dwt).
- To reverse, multiply the pennyweight value by 0.4147130133.
Worked examples
Example 1 — Convert 1 mom to dwt:
1 × 2.4113060547 = 2.4113060547 dwt
Example 2 — Convert 100 mom to dwt:
100 × 2.4113060547 = 241.1306054667 dwt
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 pennyweights daily when mixing metric and imperial tools.
10 mom × 2.4113060547 = 24.1130605467 dwt
Real-world example — Postcard and small-object dimensions
A postcard is about 5 mommes wide. Converting to pennyweights is essential for international postal addressing forms that ask for dimensions in different units across countries.
5 mom × 2.4113060547 = 12.0565302733 dwt
Real-world example — Ruler-scale measurements
A 30-momme school ruler converts cleanly to pennyweights — useful when buying a desk accessory from a retailer whose product specs use a different unit.
30 mom × 2.4113060547 = 72.33918164 dwt
Momme to Pennyweight conversion table
Standard reference values for converting mommes to pennyweights:
| Momme [mom] | Pennyweight [dwt] |
|---|---|
| 0.01 | 0.0241130605 |
| 0.1 | 0.2411306055 |
| 1 | 2.4113060547 |
| 2 | 4.8226121093 |
| 3 | 7.233918164 |
| 4 | 9.6452242187 |
| 5 | 12.0565302733 |
| 10 | 24.1130605467 |
| 20 | 48.2261210933 |
| 30 | 72.33918164 |
| 40 | 96.4522421867 |
| 50 | 120.5653027334 |
| 100 | 241.1306054667 |
| 500 | 1205.6530273337 |
| 1000 | 2411.3060546673 |
Frequently asked questions
How many pennyweights is 1 momme?
How do I convert mommes to pennyweights?
How do I convert pennyweights back to mommes?
How many pennyweights 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 = 2.4113060547 dwt) 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.