Mass and Weight · Unit Converter

Convert Momme to Ton (assay) (US)

Convert mommes to tons (assay) (us) instantly. 1 momme = 0.1285714139 ton (assay) (us) — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Ton (assay) (US) to Momme 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

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.

Force / Engineering

Ton (assay) (US)

What is a ton (assay) (us)?

The assay ton (US) equals about 29.167 grams, a mining-assay convenience unit.

Origin of the ton (assay) (us)

Devised so an assay sample's metal in milligrams reads as troy ounces per short ton.

Where it is used

Ore assaying and metallurgy.

When and where it was developed

Adopted in assay laboratories to simplify ore-grade calculation.

Momme to Ton (assay) (US) 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 tons (assay) (us):

1 mom = 0.1285714139 AT
1 AT = 7.7777786667 mom

To convert mommes to tons (assay) (us), multiply the value in mommes by 0.1285714139. To reverse, multiply tons (assay) (us) by 7.7777786667.

How to use this converter

Type a value into the calculator. The result in tons (assay) (us) updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Ton (assay) (US) to Momme converter for the reverse direction.

Step-by-step: convert mommes to tons (assay) (us)

  1. Write down the value in mommes (mom).
  2. Multiply that value by the factor 0.1285714139.
  3. The product is the equivalent value in tons (assay) (us) (AT).
  4. To reverse, multiply the ton (assay) (us) value by 7.7777786667.

Worked examples

Example 1 — Convert 1 mom to AT:
1 × 0.1285714139 = 0.1285714139 AT

Example 2 — Convert 100 mom to AT:
100 × 0.1285714139 = 12.8571413878 AT

Real-world example — Postcard and small-object dimensions

A postcard is about 5 mommes wide. Converting to tons (assay) (us) is essential for international postal addressing forms that ask for dimensions in different units across countries.

5 mom × 0.1285714139 = 0.6428570694 AT

Real-world example — Ruler-scale measurements

A 30-momme school ruler converts cleanly to tons (assay) (us) — useful when buying a desk accessory from a retailer whose product specs use a different unit.

30 mom × 0.1285714139 = 3.8571424163 AT

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 tons (assay) (us) daily when mixing metric and imperial tools.

10 mom × 0.1285714139 = 1.2857141388 AT

Momme to Ton (assay) (US) conversion table

Standard reference values for converting mommes to tons (assay) (us):

Momme [mom]Ton (assay) (US) [AT]
0.010.0012857141
0.10.0128571414
10.1285714139
20.2571428278
30.3857142416
40.5142856555
50.6428570694
101.2857141388
202.5714282776
303.8571424163
405.1428565551
506.4285706939
10012.8571413878
50064.2857069388
1000128.5714138776

Frequently asked questions

How many tons (assay) (us) is 1 momme?
1 momme equals 0.1285714139 ton (assay) (us).
How do I convert mommes to tons (assay) (us)?
Multiply the value in mommes by 0.1285714139 to get tons (assay) (us).
How do I convert tons (assay) (us) back to mommes?
Multiply the value in tons (assay) (us) by 7.7777786667, or use the Ton (assay) (US) to Momme converter.
How many tons (assay) (us) is 100 mommes?
100 mommes equals 12.8571413878 tons (assay) (us), because 100 × 0.1285714139 = 12.8571413878.

Convert Momme to other weight units

Show all Momme conversions
Metric / SI (18 units)
Momme to Attogram (ag) Momme to Femtogram (fg) Momme to Picogram (pg) Momme to Nanogram (ng) Momme to Microgram (µg) Momme to Milligram (mg) Momme to Centigram (cg) Momme to Decigram (dg) Momme to Gram (g) Momme to Dekagram (dag) Momme to Hectogram (hg) Momme to Kilogram (kg) Momme to Quintal (metric) (q) Momme to Metric Ton (t) Momme to Gigagram (Gg) Momme to Teragram (Tg) Momme to Petagram (Pg) Momme to Exagram (Eg)
Avoirdupois (15 units)
Momme to Grain (gr) Momme to Dram (avoirdupois) (dr) Momme to Ounce (oz) Momme to Pound (lb) Momme to Clove (clove) Momme to Stone (US) (st) Momme to Stone (UK) (st) Momme to Quarter (US) (qr) Momme to Quarter (UK) (qr) Momme to Hundredweight (US) (cwt) Momme to Hundredweight (UK) (cwt) Momme to Wey (wey) Momme to Kilopound (kip) (kip) Momme to Ton (short, US) (sh tn) Momme to Ton (long, UK) (long tn)
Troy & Apothecary (9 units)
Momme to Point (1/100 carat) (pt) Momme to Carat (metric) (ct) Momme to Scruple (apothecary) (s ap) Momme to Pennyweight (dwt) Momme to Mace (mace) Momme to Dram (apothecary/troy) (dr ap) Momme to Troy Ounce (oz t) Momme to Tael (tael) Momme to Pound (troy/apothecary) (lb t)
Indian / South Asian (6 units)
Momme to Ratti (ratti) Momme to Masha (masha) Momme to Tola (tola) Momme to Chittack (Chatank) (chittack) Momme to Seer (Ser) (seer) Momme to Maund (Mann) (maund)
Scientific / Atomic (9 units)
Momme to Electron Mass (rest) (me) Momme to MeV/c2 (MeV/c²) Momme to Muon Mass (mµ) Momme to Atomic Mass Unit (u) Momme to Proton Mass (mp) Momme to Neutron Mass (mn) Momme to Deuteron Mass (md) Momme to Carbon-12 Atom Mass (C-12) Momme to Planck Mass (mP)
Astronomical (4 units)
Momme to Lunar Mass (Moon) (M☾) Momme to Earth's Mass (M⊕) Momme to Jupiter Mass (MJ) Momme to Sun's Mass (M☉)
Biblical / Ancient (14 units)
Momme to Lepton (Biblical Roman) (lepton) Momme to Quadrans (Biblical Roman) (quadrans) Momme to Assarion (Biblical Roman) (assarion) Momme to Gerah (Biblical Hebrew) (gerah) Momme to Drachma (Biblical Greek) (drachma) Momme to Denarius (Biblical Roman) (denarius) Momme to Bekan (Biblical Hebrew) (bekah) Momme to Didrachma (Biblical Greek) (didrachma) Momme to Shekel (Biblical Hebrew) (shekel) Momme to Tetradrachma (Biblical Greek) (tetra) Momme to Mina (Biblical Greek) (mina) Momme to Mina (Biblical Hebrew) (mina) Momme to Talent (Biblical Greek) (talent) Momme to Talent (Biblical Hebrew) (talent)
Force / Engineering (5 units)
Momme to Poundal (pdl) Momme to Ton (assay) (US) (AT) Momme to Ton (assay) (UK) (AT) Momme to Kilogram-force square second/meter (hyl) Momme to Slug (slug)

Sources & references

Conversion factor (1 mom = 0.1285714139 AT) verified against the following authoritative sources:

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