Convert Pennyweight to Teragram
Convert pennyweights to teragrams instantly. 1 pennyweight = 1.555174e-12 teragram — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Teragram 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.
Teragram
A teragram (Tg) equals 10^9 kilograms, or one million metric tons.
From the SI prefix 'tera-' (from Greek 'teras', monster).
Used in large-scale environmental and industrial mass accounting.
The tera- prefix entered the SI in 1960.
Pennyweight to Teragram conversion formula
The relationship between pennyweights and teragrams:
To convert pennyweights to teragrams, multiply the value in pennyweights by 1.555174e-12. To reverse, multiply teragrams by 6.430149e+11.
How to use this converter
Type a value into the calculator. The result in teragrams updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Teragram to Pennyweight converter for the reverse direction.
Step-by-step: convert pennyweights to teragrams
- Write down the value in pennyweights (dwt).
- Multiply that value by the factor 1.555174e-12.
- The product is the equivalent value in teragrams (Tg).
- To reverse, multiply the teragram value by 6.430149e+11.
Worked examples
Example 1 — Convert 1 dwt to Tg:
1 × 1.555174e-12 = 1.555174e-12 Tg
Example 2 — Convert 100 dwt to Tg:
100 × 1.555174e-12 = 1.555174e-10 Tg
Real-world example — Hardware-scale dimensions
A 10-pennyweight fastener or component is about as long as a thumbnail. Mechanics and DIY enthusiasts convert between pennyweights and teragrams daily when mixing metric and imperial tools.
10 dwt × 1.555174e-12 = 1.555174e-11 Tg
Real-world example — Postcard and small-object dimensions
A postcard is about 5 pennyweights wide. Converting to teragrams is essential for international postal addressing forms that ask for dimensions in different units across countries.
5 dwt × 1.555174e-12 = 7.775869e-12 Tg
Real-world example — Ruler-scale measurements
A 30-pennyweight school ruler converts cleanly to teragrams — useful when buying a desk accessory from a retailer whose product specs use a different unit.
30 dwt × 1.555174e-12 = 4.665521e-11 Tg
Pennyweight to Teragram conversion table
Standard reference values for converting pennyweights to teragrams:
| Pennyweight [dwt] | Teragram [Tg] |
|---|---|
| 0.01 | 1.555174e-14 |
| 0.1 | 1.555174e-13 |
| 1 | 1.555174e-12 |
| 2 | 3.110348e-12 |
| 3 | 4.665521e-12 |
| 4 | 6.220695e-12 |
| 5 | 7.775869e-12 |
| 10 | 1.555174e-11 |
| 20 | 3.110348e-11 |
| 30 | 4.665521e-11 |
| 40 | 6.220695e-11 |
| 50 | 7.775869e-11 |
| 100 | 1.555174e-10 |
| 500 | 7.775869e-10 |
| 1000 | 1.555174e-9 |
Frequently asked questions
How many teragrams is 1 pennyweight?
How do I convert pennyweights to teragrams?
How do I convert teragrams back to pennyweights?
How many teragrams is 100 pennyweights?
Popular weight unit conversions
Convert Pennyweight to other weight units
Show all Pennyweight conversions
Metric / SI (18 units)
Avoirdupois (15 units)
Troy & Apothecary (9 units)
Indian / South Asian (6 units)
Scientific / Atomic (9 units)
Astronomical (4 units)
Biblical / Ancient (14 units)
Sources & references
Conversion factor (1 dwt = 1.555174e-12 Tg) 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.