Mass and Weight · Unit Converter

Convert Pound to Ton (assay) (US)

Convert pounds to tons (assay) (us) instantly. 1 pound = 15.5517366227 ton (assay) (us) — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Ton (assay) (US) to Pound 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

Avoirdupois

Pound

What is a pound?

The pound (lb) is a unit of mass equal to exactly 0.45359237 kilogram.

Origin of the pound

From Latin 'libra pondo' (a pound by weight); the symbol lb comes from 'libra'.

Where it is used

The primary weight unit in the United States and informally in the UK.

When and where it was developed

The international avoirdupois pound was fixed in the 1959 yard-and-pound agreement.

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.

Pound to Ton (assay) (US) conversion formula

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

1 lb = 15.5517366227 AT
1 AT = 0.0643015005 lb

To convert pounds to tons (assay) (us), multiply the value in pounds by 15.5517366227. To reverse, multiply tons (assay) (us) by 0.0643015005.

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 Pound converter for the reverse direction.

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

  1. Write down the value in pounds (lb).
  2. Multiply that value by the factor 15.5517366227.
  3. The product is the equivalent value in tons (assay) (us) (AT).
  4. To reverse, multiply the ton (assay) (us) value by 0.0643015005.

Worked examples

Example 1 — Convert 1 lb to AT:
1 × 15.5517366227 = 15.5517366227 AT

Example 2 — Convert 100 lb to AT:
100 × 15.5517366227 = 1555.1736622659 AT

Real-world example — Fabric and tailoring

One pound of fabric converts to a value in tons (assay) (us) commonly used for seam allowances. Garment patterns frequently switch between the two units on a single instruction sheet.

1 lb × 15.5517366227 = 15.5517366227 AT

Real-world example — Body height conversion (reverse direction)

You measure 1.75 pounds tall and need to fill in a gym membership form or medical record that asks for height in tons (assay) (us). This is the most-used everyday length conversion in metric-using countries.

1.75 lb × 15.5517366227 = 27.2155390897 AT

Real-world example — Pet and accessory dimensions

A 3-pound dog leash equals a tidy round value in tons (assay) (us). Pet-supply shopping frequently mixes the two units across product specifications.

3 lb × 15.5517366227 = 46.655209868 AT

Pound to Ton (assay) (US) conversion table

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

Pound [lb]Ton (assay) (US) [AT]
0.010.1555173662
0.11.5551736623
115.5517366227
231.1034732453
346.655209868
462.2069464906
577.7586831133
10155.5173662266
20311.0347324532
30466.5520986798
40622.0694649063
50777.5868311329
1001555.1736622659
5007775.8683113293
100015551.7366226587

Frequently asked questions

How many tons (assay) (us) is 1 pound?
1 pound equals 15.5517366227 ton (assay) (us).
How do I convert pounds to tons (assay) (us)?
Multiply the value in pounds by 15.5517366227 to get tons (assay) (us).
How do I convert tons (assay) (us) back to pounds?
Multiply the value in tons (assay) (us) by 0.0643015005, or use the Ton (assay) (US) to Pound converter.
How many tons (assay) (us) is 100 pounds?
100 pounds equals 1555.1736622659 tons (assay) (us), because 100 × 15.5517366227 = 1555.1736622659.

Convert Pound to other weight units

Show all Pound conversions
Metric / SI (18 units)
Pound to Attogram (ag) Pound to Femtogram (fg) Pound to Picogram (pg) Pound to Nanogram (ng) Pound to Microgram (µg) Pound to Milligram (mg) Pound to Centigram (cg) Pound to Decigram (dg) Pound to Gram (g) Pound to Dekagram (dag) Pound to Hectogram (hg) Pound to Kilogram (kg) Pound to Quintal (metric) (q) Pound to Metric Ton (t) Pound to Gigagram (Gg) Pound to Teragram (Tg) Pound to Petagram (Pg) Pound to Exagram (Eg)
Avoirdupois (14 units)
Pound to Grain (gr) Pound to Dram (avoirdupois) (dr) Pound to Ounce (oz) Pound to Clove (clove) Pound to Stone (US) (st) Pound to Stone (UK) (st) Pound to Quarter (US) (qr) Pound to Quarter (UK) (qr) Pound to Hundredweight (US) (cwt) Pound to Hundredweight (UK) (cwt) Pound to Wey (wey) Pound to Kilopound (kip) (kip) Pound to Ton (short, US) (sh tn) Pound to Ton (long, UK) (long tn)
Troy & Apothecary (10 units)
Pound to Point (1/100 carat) (pt) Pound to Carat (metric) (ct) Pound to Scruple (apothecary) (s ap) Pound to Pennyweight (dwt) Pound to Momme (mom) Pound to Mace (mace) Pound to Dram (apothecary/troy) (dr ap) Pound to Troy Ounce (oz t) Pound to Tael (tael) Pound to Pound (troy/apothecary) (lb t)
Indian / South Asian (6 units)
Pound to Ratti (ratti) Pound to Masha (masha) Pound to Tola (tola) Pound to Chittack (Chatank) (chittack) Pound to Seer (Ser) (seer) Pound to Maund (Mann) (maund)
Scientific / Atomic (9 units)
Pound to Electron Mass (rest) (me) Pound to MeV/c2 (MeV/c²) Pound to Muon Mass (mµ) Pound to Atomic Mass Unit (u) Pound to Proton Mass (mp) Pound to Neutron Mass (mn) Pound to Deuteron Mass (md) Pound to Carbon-12 Atom Mass (C-12) Pound to Planck Mass (mP)
Astronomical (4 units)
Pound to Lunar Mass (Moon) (M☾) Pound to Earth's Mass (M⊕) Pound to Jupiter Mass (MJ) Pound to Sun's Mass (M☉)
Biblical / Ancient (14 units)
Pound to Lepton (Biblical Roman) (lepton) Pound to Quadrans (Biblical Roman) (quadrans) Pound to Assarion (Biblical Roman) (assarion) Pound to Gerah (Biblical Hebrew) (gerah) Pound to Drachma (Biblical Greek) (drachma) Pound to Denarius (Biblical Roman) (denarius) Pound to Bekan (Biblical Hebrew) (bekah) Pound to Didrachma (Biblical Greek) (didrachma) Pound to Shekel (Biblical Hebrew) (shekel) Pound to Tetradrachma (Biblical Greek) (tetra) Pound to Mina (Biblical Greek) (mina) Pound to Mina (Biblical Hebrew) (mina) Pound to Talent (Biblical Greek) (talent) Pound to Talent (Biblical Hebrew) (talent)
Force / Engineering (5 units)
Pound to Poundal (pdl) Pound to Ton (assay) (US) (AT) Pound to Ton (assay) (UK) (AT) Pound to Kilogram-force square second/meter (hyl) Pound to Slug (slug)

Sources & references

Conversion factor (1 lb = 15.5517366227 AT) verified against the following authoritative sources:

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