Convert Pennyweight to Earth's Mass
Convert pennyweights to earth's mass instantly. 1 pennyweight = 2.602366e-28 earth's mass — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Earth's Mass 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.
Earth's Mass
The Earth mass (M(E)) is about 5.976E24 kg.
Adopted as a convenient unit for the masses of terrestrial planets.
Astronomy and planetary science.
Refined over centuries since Cavendish first 'weighed the Earth' in 1798.
Pennyweight to Earth's Mass 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 pennyweights and earth's mass:
To convert pennyweights to earth's mass, multiply the value in pennyweights by 2.602366e-28. To reverse, multiply earth's mass by 3.842657e+27.
How to use this converter
Type a value into the calculator. The result in earth's mass updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Earth's Mass to Pennyweight converter for the reverse direction.
Step-by-step: convert pennyweights to earth's mass
- Write down the value in pennyweights (dwt).
- Multiply that value by the factor 2.602366e-28.
- The product is the equivalent value in earth's mass (M⊕).
- To reverse, multiply the earth's mass value by 3.842657e+27.
Worked examples
Example 1 — Convert 1 dwt to M⊕:
1 × 2.602366e-28 = 2.602366e-28 M⊕
Example 2 — Convert 100 dwt to M⊕:
100 × 2.602366e-28 = 2.602366e-26 M⊕
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 earth's mass daily when mixing metric and imperial tools.
10 dwt × 2.602366e-28 = 2.602366e-27 M⊕
Real-world example — Postcard and small-object dimensions
A postcard is about 5 pennyweights wide. Converting to earth's mass is essential for international postal addressing forms that ask for dimensions in different units across countries.
5 dwt × 2.602366e-28 = 1.301183e-27 M⊕
Real-world example — Ruler-scale measurements
A 30-pennyweight school ruler converts cleanly to earth's mass — useful when buying a desk accessory from a retailer whose product specs use a different unit.
30 dwt × 2.602366e-28 = 7.807097e-27 M⊕
Pennyweight to Earth's Mass conversion table
Standard reference values for converting pennyweights to earth's mass:
| Pennyweight [dwt] | Earth's Mass [M⊕] |
|---|---|
| 0.01 | 2.602366e-30 |
| 0.1 | 2.602366e-29 |
| 1 | 2.602366e-28 |
| 2 | 5.204732e-28 |
| 3 | 7.807097e-28 |
| 4 | 1.040946e-27 |
| 5 | 1.301183e-27 |
| 10 | 2.602366e-27 |
| 20 | 5.204732e-27 |
| 30 | 7.807097e-27 |
| 40 | 1.040946e-26 |
| 50 | 1.301183e-26 |
| 100 | 2.602366e-26 |
| 500 | 1.301183e-25 |
| 1000 | 2.602366e-25 |
Frequently asked questions
How many earth's mass is 1 pennyweight?
How do I convert pennyweights to earth's mass?
How do I convert earth's mass back to pennyweights?
How many earth's mass 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 = 2.602366e-28 M⊕) 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.