Convert Scruple (apothecary) to Momme
Convert scruples (apothecary) to mommes instantly. 1 scruple (apothecary) = 0.3455941867 momme — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Momme to Scruple (apothecary) converter for the reverse conversion.
Units explained
Scruple (apothecary)
The apothecary scruple equals 20 grains, about 1.296 grams.
From Latin 'scrupulus', a small sharp pebble used as a tiny weight.
Historical apothecary dosing of powders.
Part of the apothecaries' system used through the 19th century.
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.
Scruple (apothecary) 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 scruples (apothecary) and mommes:
To convert scruples (apothecary) to mommes, multiply the value in scruples (apothecary) by 0.3455941867. To reverse, multiply mommes by 2.8935671912.
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 Scruple (apothecary) converter for the reverse direction.
Step-by-step: convert scruples (apothecary) to mommes
- Write down the value in scruples (apothecary) (s ap).
- Multiply that value by the factor 0.3455941867.
- The product is the equivalent value in mommes (mom).
- To reverse, multiply the momme value by 2.8935671912.
Worked examples
Example 1 — Convert 1 s ap to mom:
1 × 0.3455941867 = 0.3455941867 mom
Example 2 — Convert 100 s ap to mom:
100 × 0.3455941867 = 34.5594186667 mom
Real-world example — Hardware-scale dimensions
A 10-scruple (apothecary) fastener or component is about as long as a thumbnail. Mechanics and DIY enthusiasts convert between scruples (apothecary) and mommes daily when mixing metric and imperial tools.
10 s ap × 0.3455941867 = 3.4559418667 mom
Real-world example — Postcard and small-object dimensions
A postcard is about 5 scruples (apothecary) wide. Converting to mommes is essential for international postal addressing forms that ask for dimensions in different units across countries.
5 s ap × 0.3455941867 = 1.7279709333 mom
Real-world example — Ruler-scale measurements
A 30-scruple (apothecary) school ruler converts cleanly to mommes — useful when buying a desk accessory from a retailer whose product specs use a different unit.
30 s ap × 0.3455941867 = 10.3678256 mom
Scruple (apothecary) to Momme conversion table
Standard reference values for converting scruples (apothecary) to mommes:
| Scruple (apothecary) [s ap] | Momme [mom] |
|---|---|
| 0.01 | 0.0034559419 |
| 0.1 | 0.0345594187 |
| 1 | 0.3455941867 |
| 2 | 0.6911883733 |
| 3 | 1.03678256 |
| 4 | 1.3823767467 |
| 5 | 1.7279709333 |
| 10 | 3.4559418667 |
| 20 | 6.9118837333 |
| 30 | 10.3678256 |
| 40 | 13.8237674667 |
| 50 | 17.2797093333 |
| 100 | 34.5594186667 |
| 500 | 172.7970933333 |
| 1000 | 345.5941866667 |
Frequently asked questions
How many mommes is 1 scruple (apothecary)?
How do I convert scruples (apothecary) to mommes?
How do I convert mommes back to scruples (apothecary)?
How many mommes is 100 scruples (apothecary)?
Popular weight unit conversions
Convert Scruple (apothecary) to other weight units
Show all Scruple (apothecary) 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 s ap = 0.3455941867 mom) 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.