Convert Momme to Carat (metric)
Convert mommes to carats (metric) instantly. 1 momme = 18.75 carat (metric) — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Carat (metric) 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.
Carat (metric)
The metric carat (ct) equals exactly 200 milligrams (0.0002 kg).
From Arabic 'qirat' and Greek 'keration', the carob seed once used as a counterweight.
The worldwide standard for gemstone and diamond mass.
The metric carat was fixed at 200 mg internationally in 1907.
Momme to Carat (metric) 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 carats (metric):
To convert mommes to carats (metric), multiply the value in mommes by 18.75. To reverse, multiply carats (metric) by 0.0533333333.
How to use this converter
Type a value into the calculator. The result in carats (metric) updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Carat (metric) to Momme converter for the reverse direction.
Step-by-step: convert mommes to carats (metric)
- Write down the value in mommes (mom).
- Multiply that value by the factor 18.75.
- The product is the equivalent value in carats (metric) (ct).
- To reverse, multiply the carat (metric) value by 0.0533333333.
Worked examples
Example 1 — Convert 1 mom to ct:
1 × 18.75 = 18.75 ct
Example 2 — Convert 100 mom to ct:
100 × 18.75 = 1875 ct
Real-world example — Adjacent metric sub-units
One momme equals 1,000 carats (metric). Engineers move between these scales constantly: PCB feature sizes in the larger unit, wire-bond diameters in the smaller.
1 mom × 18.75 = 18.75 ct
Real-world example — Adjacent small-scale precision
One momme equals 1,000 carats (metric) — 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 mom × 18.75 = 18.75 ct
Momme to Carat (metric) conversion table
Standard reference values for converting mommes to carats (metric):
| Momme [mom] | Carat (metric) [ct] |
|---|---|
| 0.01 | 0.1875 |
| 0.1 | 1.875 |
| 1 | 18.75 |
| 2 | 37.5 |
| 3 | 56.25 |
| 4 | 75 |
| 5 | 93.75 |
| 10 | 187.5 |
| 20 | 375 |
| 30 | 562.5 |
| 40 | 750 |
| 50 | 937.5 |
| 100 | 1875 |
| 500 | 9375 |
| 1000 | 18750 |
Frequently asked questions
How many carats (metric) is 1 momme?
How do I convert mommes to carats (metric)?
How do I convert carats (metric) back to mommes?
How many carats (metric) 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 = 18.75 ct) 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.