Convert Ton (assay) (US) to Ton (long, UK)
Convert tons (assay) (us) to tons (long, uk) instantly. 1 ton (assay) (us) = 2.870603e-5 ton (long, uk) — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Ton (long, UK) to Ton (assay) (US) converter for the reverse conversion.
Units explained
Ton (assay) (US)
The assay ton (US) equals about 29.167 grams, a mining-assay convenience unit.
Devised so an assay sample's metal in milligrams reads as troy ounces per short ton.
Ore assaying and metallurgy.
Adopted in assay laboratories to simplify ore-grade calculation.
Ton (long, UK)
The long (UK) ton equals 2,240 pounds, about 1,016 kilograms.
The British imperial ton, equal to 20 long hundredweight.
UK shipping and historical heavy industry.
Standardized within the British imperial system.
Ton (assay) (US) to Ton (long, UK) conversion formula
The relationship between tons (assay) (us) and tons (long, uk):
To convert tons (assay) (us) to tons (long, uk), multiply the value in tons (assay) (us) by 2.870603e-5. To reverse, multiply tons (long, uk) by 34835.8900347554.
How to use this converter
Type a value into the calculator. The result in tons (long, uk) 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 (long, UK) to Ton (assay) (US) converter for the reverse direction.
Step-by-step: convert tons (assay) (us) to tons (long, uk)
- Write down the value in tons (assay) (us) (AT).
- Multiply that value by the factor 2.870603e-5.
- The product is the equivalent value in tons (long, uk) (long tn).
- To reverse, multiply the ton (long, uk) value by 34835.8900347554.
Worked examples
Example 1 — Convert 1 AT to long tn:
1 × 2.870603e-5 = 2.870603e-5 long tn
Example 2 — Convert 100 AT to long tn:
100 × 2.870603e-5 = 0.0028706027 long tn
Real-world example — Architectural to geographic scale
A 100,000-ton (assay) (us) measurement equals one ton (long, uk). The five-order-of-magnitude scale change comes up in mapping work where architectural site plans must be related to road-network maps.
100000 AT × 2.870603e-5 = 2.8706027003 long tn
Real-world example — Small to geographic-scale
100,000 tons (assay) (us) equals one ton (long, uk) — a useful conversion when small-scale survey diagrams must be related to road-network distances on a different map.
100000 AT × 2.870603e-5 = 2.8706027003 long tn
Ton (assay) (US) to Ton (long, UK) conversion table
Standard reference values for converting tons (assay) (us) to tons (long, uk):
| Ton (assay) (US) [AT] | Ton (long, UK) [long tn] |
|---|---|
| 0.01 | 2.870603e-7 |
| 0.1 | 2.870603e-6 |
| 1 | 2.870603e-5 |
| 2 | 5.741205e-5 |
| 3 | 8.611808e-5 |
| 4 | 0.0001148241 |
| 5 | 0.0001435301 |
| 10 | 0.0002870603 |
| 20 | 0.0005741205 |
| 30 | 0.0008611808 |
| 40 | 0.0011482411 |
| 50 | 0.0014353014 |
| 100 | 0.0028706027 |
| 500 | 0.0143530135 |
| 1000 | 0.028706027 |
Frequently asked questions
How many tons (long, uk) is 1 ton (assay) (us)?
How do I convert tons (assay) (us) to tons (long, uk)?
How do I convert tons (long, uk) back to tons (assay) (us)?
How many tons (long, uk) is 100 tons (assay) (us)?
Popular weight unit conversions
Convert Ton (assay) (US) to other weight units
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Metric / SI (18 units)
Avoirdupois (15 units)
Troy & Apothecary (10 units)
Indian / South Asian (6 units)
Scientific / Atomic (9 units)
Astronomical (4 units)
Biblical / Ancient (14 units)
Sources & references
Conversion factor (1 AT = 2.870603e-5 long tn) 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 Astronomical Union — System of Astronomical Constants
The IAU defines astronomical units including the AU (149597870700 m exactly) light-year and parsec used in astronomy and astrophysics.