Mass and Weight · Unit Converter

Convert Milligram to Ton (assay) (US)

Convert milligrams to tons (assay) (us) instantly. 1 milligram = 3.428571e-5 ton (assay) (us) — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Ton (assay) (US) to Milligram 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

Metric / SI

Milligram

What is a milligram?

A milligram (mg) equals one-millionth of a kilogram, or 0.001 gram.

Origin of the milligram

From the SI prefix 'milli-' (from Latin 'mille', thousand).

Where it is used

Standard for medicine dosing, nutrition labels, and fine jewelry.

When and where it was developed

Part of the original metric system of 1795.

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.

Milligram to Ton (assay) (US) conversion formula

The relationship between milligrams and tons (assay) (us):

1 mg = 3.428571e-5 AT
1 AT = 29166.67 mg

To convert milligrams to tons (assay) (us), multiply the value in milligrams by 3.428571e-5. To reverse, multiply tons (assay) (us) by 29166.67.

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 Milligram converter for the reverse direction.

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

  1. Write down the value in milligrams (mg).
  2. Multiply that value by the factor 3.428571e-5.
  3. The product is the equivalent value in tons (assay) (us) (AT).
  4. To reverse, multiply the ton (assay) (us) value by 29166.67.

Worked examples

Example 1 — Convert 1 mg to AT:
1 × 3.428571e-5 = 3.428571e-5 AT

Example 2 — Convert 100 mg to AT:
100 × 3.428571e-5 = 0.003428571 AT

Real-world example — Plastic film and laminate thickness

A 500-milligram sheet is a typical spec for ID-card laminates and film overlays. Converting to tons (assay) (us) aligns the value with the unit most CAD systems and material datasheets prefer.

500 mg × 3.428571e-5 = 0.0171428552 AT

Real-world example — Packaging gauge

A 4-milligram plastic bag thickness is a common spec for grocery and freezer bags. Converting from milligrams to tons (assay) (us) is what packaging buyers do whenever they bridge US and metric supplier quotes.

4 mg × 3.428571e-5 = 0.0001371428 AT

Milligram to Ton (assay) (US) conversion table

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

Milligram [mg]Ton (assay) (US) [AT]
0.013.428571e-7
0.13.428571e-6
13.428571e-5
26.857142e-5
30.0001028571
40.0001371428
50.0001714286
100.0003428571
200.0006857142
300.0010285713
400.0013714284
500.0017142855
1000.003428571
5000.0171428552
10000.0342857104

Frequently asked questions

How many tons (assay) (us) is 1 milligram?
1 milligram equals 3.428571e-5 ton (assay) (us).
How do I convert milligrams to tons (assay) (us)?
Multiply the value in milligrams by 3.428571e-5 to get tons (assay) (us).
How do I convert tons (assay) (us) back to milligrams?
Multiply the value in tons (assay) (us) by 29166.67, or use the Ton (assay) (US) to Milligram converter.
How many tons (assay) (us) is 100 milligrams?
100 milligrams equals 0.003428571 tons (assay) (us), because 100 × 3.428571e-5 = 0.003428571.

Convert Milligram to other weight units

Show all Milligram conversions
Metric / SI (17 units)
Milligram to Attogram (ag) Milligram to Femtogram (fg) Milligram to Picogram (pg) Milligram to Nanogram (ng) Milligram to Microgram (µg) Milligram to Centigram (cg) Milligram to Decigram (dg) Milligram to Gram (g) Milligram to Dekagram (dag) Milligram to Hectogram (hg) Milligram to Kilogram (kg) Milligram to Quintal (metric) (q) Milligram to Metric Ton (t) Milligram to Gigagram (Gg) Milligram to Teragram (Tg) Milligram to Petagram (Pg) Milligram to Exagram (Eg)
Avoirdupois (15 units)
Milligram to Grain (gr) Milligram to Dram (avoirdupois) (dr) Milligram to Ounce (oz) Milligram to Pound (lb) Milligram to Clove (clove) Milligram to Stone (US) (st) Milligram to Stone (UK) (st) Milligram to Quarter (US) (qr) Milligram to Quarter (UK) (qr) Milligram to Hundredweight (US) (cwt) Milligram to Hundredweight (UK) (cwt) Milligram to Wey (wey) Milligram to Kilopound (kip) (kip) Milligram to Ton (short, US) (sh tn) Milligram to Ton (long, UK) (long tn)
Troy & Apothecary (10 units)
Milligram to Point (1/100 carat) (pt) Milligram to Carat (metric) (ct) Milligram to Scruple (apothecary) (s ap) Milligram to Pennyweight (dwt) Milligram to Momme (mom) Milligram to Mace (mace) Milligram to Dram (apothecary/troy) (dr ap) Milligram to Troy Ounce (oz t) Milligram to Tael (tael) Milligram to Pound (troy/apothecary) (lb t)
Indian / South Asian (6 units)
Milligram to Ratti (ratti) Milligram to Masha (masha) Milligram to Tola (tola) Milligram to Chittack (Chatank) (chittack) Milligram to Seer (Ser) (seer) Milligram to Maund (Mann) (maund)
Scientific / Atomic (9 units)
Milligram to Electron Mass (rest) (me) Milligram to MeV/c2 (MeV/c²) Milligram to Muon Mass (mµ) Milligram to Atomic Mass Unit (u) Milligram to Proton Mass (mp) Milligram to Neutron Mass (mn) Milligram to Deuteron Mass (md) Milligram to Carbon-12 Atom Mass (C-12) Milligram to Planck Mass (mP)
Astronomical (4 units)
Milligram to Lunar Mass (Moon) (M☾) Milligram to Earth's Mass (M⊕) Milligram to Jupiter Mass (MJ) Milligram to Sun's Mass (M☉)
Biblical / Ancient (14 units)
Milligram to Lepton (Biblical Roman) (lepton) Milligram to Quadrans (Biblical Roman) (quadrans) Milligram to Assarion (Biblical Roman) (assarion) Milligram to Gerah (Biblical Hebrew) (gerah) Milligram to Drachma (Biblical Greek) (drachma) Milligram to Denarius (Biblical Roman) (denarius) Milligram to Bekan (Biblical Hebrew) (bekah) Milligram to Didrachma (Biblical Greek) (didrachma) Milligram to Shekel (Biblical Hebrew) (shekel) Milligram to Tetradrachma (Biblical Greek) (tetra) Milligram to Mina (Biblical Greek) (mina) Milligram to Mina (Biblical Hebrew) (mina) Milligram to Talent (Biblical Greek) (talent) Milligram to Talent (Biblical Hebrew) (talent)
Force / Engineering (5 units)
Milligram to Poundal (pdl) Milligram to Ton (assay) (US) (AT) Milligram to Ton (assay) (UK) (AT) Milligram to Kilogram-force square second/meter (hyl) Milligram to Slug (slug)

Sources & references

Conversion factor (1 mg = 3.428571e-5 AT) verified against the following authoritative sources:

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