Convert Pennyweight to Ton (long, UK)
Convert pennyweights to tons (long, uk) instantly. 1 pennyweight = 1.530612e-6 ton (long, uk) — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Ton (long, UK) to Pennyweight converter for the reverse conversion.
Units explained
Pennyweight
The pennyweight (dwt) equals one-twentieth of a troy ounce, 24 grains (about 1.555 g).
From the mass of a medieval English silver penny; symbol dwt from 'denarius weight'.
Jewelry making and precious-metal scrap valuation in the US.
Derived from the medieval English coinage system.
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.
Pennyweight to Ton (long, UK) conversion formula
The relationship between pennyweights and tons (long, uk):
To convert pennyweights to tons (long, uk), multiply the value in pennyweights by 1.530612e-6. To reverse, multiply tons (long, uk) by 653333.3501374573.
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 Pennyweight converter for the reverse direction.
Step-by-step: convert pennyweights to tons (long, uk)
- Write down the value in pennyweights (dwt).
- Multiply that value by the factor 1.530612e-6.
- The product is the equivalent value in tons (long, uk) (long tn).
- To reverse, multiply the ton (long, uk) value by 653333.3501374573.
Worked examples
Example 1 — Convert 1 dwt to long tn:
1 × 1.530612e-6 = 1.530612e-6 long tn
Example 2 — Convert 100 dwt to long tn:
100 × 1.530612e-6 = 0.0001530612 long tn
Real-world example — Small to geographic-scale
100,000 pennyweights 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 dwt × 1.530612e-6 = 0.1530612206 long tn
Real-world example — Architectural to geographic scale
A 100,000-pennyweight 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 dwt × 1.530612e-6 = 0.1530612206 long tn
Pennyweight to Ton (long, UK) conversion table
Standard reference values for converting pennyweights to tons (long, uk):
| Pennyweight [dwt] | Ton (long, UK) [long tn] |
|---|---|
| 0.01 | 1.530612e-8 |
| 0.1 | 1.530612e-7 |
| 1 | 1.530612e-6 |
| 2 | 3.061224e-6 |
| 3 | 4.591837e-6 |
| 4 | 6.122449e-6 |
| 5 | 7.653061e-6 |
| 10 | 1.530612e-5 |
| 20 | 3.061224e-5 |
| 30 | 4.591837e-5 |
| 40 | 6.122449e-5 |
| 50 | 7.653061e-5 |
| 100 | 0.0001530612 |
| 500 | 0.0007653061 |
| 1000 | 0.0015306122 |
Frequently asked questions
How many tons (long, uk) is 1 pennyweight?
How do I convert pennyweights to tons (long, uk)?
How do I convert tons (long, uk) back to pennyweights?
How many tons (long, uk) is 100 pennyweights?
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Sources & references
Conversion factor (1 dwt = 1.530612e-6 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 Hydrographic Organization — Resolution on the Nautical Mile
International authority that standardised the nautical mile at exactly 1852 m in 1929 — the value adopted worldwide for sea and air navigation.