Mass and Weight · Unit Converter

Convert Tola to Ton (assay) (US)

Convert tolas to tons (assay) (us) instantly. 1 tola = 0.3999017989 ton (assay) (us) — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Ton (assay) (US) to Tola 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

Indian / South Asian

Tola

What is a tola?

The tola equals 180 troy grains, about 11.6638 grams (three-eighths of a troy ounce).

Origin of the tola

From Sanskrit 'tula', meaning a balance or weighing.

Where it is used

The primary unit for gold and silver across India, Pakistan, and Nepal.

When and where it was developed

Fixed at 180 grains under British India in 1833.

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.

Tola 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 tolas and tons (assay) (us):

1 tola = 0.3999017989 AT
1 AT = 2.5006139078 tola

To convert tolas to tons (assay) (us), multiply the value in tolas by 0.3999017989. To reverse, multiply tons (assay) (us) by 2.5006139078.

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 Tola converter for the reverse direction.

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

  1. Write down the value in tolas (tola).
  2. Multiply that value by the factor 0.3999017989.
  3. The product is the equivalent value in tons (assay) (us) (AT).
  4. To reverse, multiply the ton (assay) (us) value by 2.5006139078.

Worked examples

Example 1 — Convert 1 tola to AT:
1 × 0.3999017989 = 0.3999017989 AT

Example 2 — Convert 100 tola to AT:
100 × 0.3999017989 = 39.9901798868 AT

Real-world example — Hardware-scale dimensions

A 10-tola fastener or component is about as long as a thumbnail. Mechanics and DIY enthusiasts convert between tolas and tons (assay) (us) daily when mixing metric and imperial tools.

10 tola × 0.3999017989 = 3.9990179887 AT

Real-world example — Postcard and small-object dimensions

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

5 tola × 0.3999017989 = 1.9995089943 AT

Real-world example — Ruler-scale measurements

A 30-tola 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 tola × 0.3999017989 = 11.9970539661 AT

Tola to Ton (assay) (US) conversion table

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

Tola [tola]Ton (assay) (US) [AT]
0.010.003999018
0.10.0399901799
10.3999017989
20.7998035977
31.1997053966
41.5996071955
51.9995089943
103.9990179887
207.9980359774
3011.9970539661
4015.9960719547
5019.9950899434
10039.9901798868
500199.9508994342
1000399.9017988684

Frequently asked questions

How many tons (assay) (us) is 1 tola?
1 tola equals 0.3999017989 ton (assay) (us).
How do I convert tolas to tons (assay) (us)?
Multiply the value in tolas by 0.3999017989 to get tons (assay) (us).
How do I convert tons (assay) (us) back to tolas?
Multiply the value in tons (assay) (us) by 2.5006139078, or use the Ton (assay) (US) to Tola converter.
How many tons (assay) (us) is 100 tolas?
100 tolas equals 39.9901798868 tons (assay) (us), because 100 × 0.3999017989 = 39.9901798868.

Convert Tola to other weight units

Show all Tola conversions
Metric / SI (18 units)
Tola to Attogram (ag) Tola to Femtogram (fg) Tola to Picogram (pg) Tola to Nanogram (ng) Tola to Microgram (µg) Tola to Milligram (mg) Tola to Centigram (cg) Tola to Decigram (dg) Tola to Gram (g) Tola to Dekagram (dag) Tola to Hectogram (hg) Tola to Kilogram (kg) Tola to Quintal (metric) (q) Tola to Metric Ton (t) Tola to Gigagram (Gg) Tola to Teragram (Tg) Tola to Petagram (Pg) Tola to Exagram (Eg)
Avoirdupois (15 units)
Tola to Grain (gr) Tola to Dram (avoirdupois) (dr) Tola to Ounce (oz) Tola to Pound (lb) Tola to Clove (clove) Tola to Stone (US) (st) Tola to Stone (UK) (st) Tola to Quarter (US) (qr) Tola to Quarter (UK) (qr) Tola to Hundredweight (US) (cwt) Tola to Hundredweight (UK) (cwt) Tola to Wey (wey) Tola to Kilopound (kip) (kip) Tola to Ton (short, US) (sh tn) Tola to Ton (long, UK) (long tn)
Troy & Apothecary (10 units)
Tola to Point (1/100 carat) (pt) Tola to Carat (metric) (ct) Tola to Scruple (apothecary) (s ap) Tola to Pennyweight (dwt) Tola to Momme (mom) Tola to Mace (mace) Tola to Dram (apothecary/troy) (dr ap) Tola to Troy Ounce (oz t) Tola to Tael (tael) Tola to Pound (troy/apothecary) (lb t)
Indian / South Asian (5 units)
Tola to Ratti (ratti) Tola to Masha (masha) Tola to Chittack (Chatank) (chittack) Tola to Seer (Ser) (seer) Tola to Maund (Mann) (maund)
Scientific / Atomic (9 units)
Tola to Electron Mass (rest) (me) Tola to MeV/c2 (MeV/c²) Tola to Muon Mass (mµ) Tola to Atomic Mass Unit (u) Tola to Proton Mass (mp) Tola to Neutron Mass (mn) Tola to Deuteron Mass (md) Tola to Carbon-12 Atom Mass (C-12) Tola to Planck Mass (mP)
Astronomical (4 units)
Tola to Lunar Mass (Moon) (M☾) Tola to Earth's Mass (M⊕) Tola to Jupiter Mass (MJ) Tola to Sun's Mass (M☉)
Biblical / Ancient (14 units)
Tola to Lepton (Biblical Roman) (lepton) Tola to Quadrans (Biblical Roman) (quadrans) Tola to Assarion (Biblical Roman) (assarion) Tola to Gerah (Biblical Hebrew) (gerah) Tola to Drachma (Biblical Greek) (drachma) Tola to Denarius (Biblical Roman) (denarius) Tola to Bekan (Biblical Hebrew) (bekah) Tola to Didrachma (Biblical Greek) (didrachma) Tola to Shekel (Biblical Hebrew) (shekel) Tola to Tetradrachma (Biblical Greek) (tetra) Tola to Mina (Biblical Greek) (mina) Tola to Mina (Biblical Hebrew) (mina) Tola to Talent (Biblical Greek) (talent) Tola to Talent (Biblical Hebrew) (talent)
Force / Engineering (5 units)
Tola to Poundal (pdl) Tola to Ton (assay) (US) (AT) Tola to Ton (assay) (UK) (AT) Tola to Kilogram-force square second/meter (hyl) Tola to Slug (slug)

Sources & references

Conversion factor (1 tola = 0.3999017989 AT) verified against the following authoritative sources:

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