Convert Pennyweight to Mace
Convert pennyweights to maces instantly. 1 pennyweight = 0.4114286062 mace — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Mace 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.
Mace
The mace equals one-tenth of a tael, about 3.78 grams.
From the Chinese 'qian'; 'mace' is the European trade name.
Chinese and Southeast Asian gold and traditional-medicine trade.
Part of the traditional Chinese tael system.
Pennyweight to Mace 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 maces:
To convert pennyweights to maces, multiply the value in pennyweights by 0.4114286062. To reverse, multiply maces by 2.4305553501.
How to use this converter
Type a value into the calculator. The result in maces updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Mace to Pennyweight converter for the reverse direction.
Step-by-step: convert pennyweights to maces
- Write down the value in pennyweights (dwt).
- Multiply that value by the factor 0.4114286062.
- The product is the equivalent value in maces (mace).
- To reverse, multiply the mace value by 2.4305553501.
Worked examples
Example 1 — Convert 1 dwt to mace:
1 × 0.4114286062 = 0.4114286062 mace
Example 2 — Convert 100 dwt to mace:
100 × 0.4114286062 = 41.1428606199 mace
Real-world example — Ruler-scale measurements
A 30-pennyweight school ruler converts cleanly to maces — useful when buying a desk accessory from a retailer whose product specs use a different unit.
30 dwt × 0.4114286062 = 12.342858186 mace
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 maces daily when mixing metric and imperial tools.
10 dwt × 0.4114286062 = 4.114286062 mace
Real-world example — Postcard and small-object dimensions
A postcard is about 5 pennyweights wide. Converting to maces is essential for international postal addressing forms that ask for dimensions in different units across countries.
5 dwt × 0.4114286062 = 2.057143031 mace
Pennyweight to Mace conversion table
Standard reference values for converting pennyweights to maces:
| Pennyweight [dwt] | Mace [mace] |
|---|---|
| 0.01 | 0.0041142861 |
| 0.1 | 0.0411428606 |
| 1 | 0.4114286062 |
| 2 | 0.8228572124 |
| 3 | 1.2342858186 |
| 4 | 1.6457144248 |
| 5 | 2.057143031 |
| 10 | 4.114286062 |
| 20 | 8.228572124 |
| 30 | 12.342858186 |
| 40 | 16.4571442479 |
| 50 | 20.5714303099 |
| 100 | 41.1428606199 |
| 500 | 205.7143030993 |
| 1000 | 411.4286061986 |
Frequently asked questions
How many maces is 1 pennyweight?
How do I convert pennyweights to maces?
How do I convert maces back to pennyweights?
How many maces is 100 pennyweights?
Popular weight unit conversions
Convert Pennyweight to other weight units
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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 = 0.4114286062 mace) 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.