Convert Scruple (apothecary) to Mace
Convert scruples (apothecary) to maces instantly. 1 scruple (apothecary) = 0.3428571807 mace — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Mace to Scruple (apothecary) converter for the reverse conversion.
Units explained
Scruple (apothecary)
The apothecary scruple equals 20 grains, about 1.296 grams.
From Latin 'scrupulus', a small sharp pebble used as a tiny weight.
Historical apothecary dosing of powders.
Part of the apothecaries' system used through the 19th century.
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.
Scruple (apothecary) 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 scruples (apothecary) and maces:
To convert scruples (apothecary) to maces, multiply the value in scruples (apothecary) by 0.3428571807. To reverse, multiply maces by 2.9166663452.
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 Scruple (apothecary) converter for the reverse direction.
Step-by-step: convert scruples (apothecary) to maces
- Write down the value in scruples (apothecary) (s ap).
- Multiply that value by the factor 0.3428571807.
- The product is the equivalent value in maces (mace).
- To reverse, multiply the mace value by 2.9166663452.
Worked examples
Example 1 — Convert 1 s ap to mace:
1 × 0.3428571807 = 0.3428571807 mace
Example 2 — Convert 100 s ap to mace:
100 × 0.3428571807 = 34.2857180651 mace
Real-world example — Postcard and small-object dimensions
A postcard is about 5 scruples (apothecary) wide. Converting to maces is essential for international postal addressing forms that ask for dimensions in different units across countries.
5 s ap × 0.3428571807 = 1.7142859033 mace
Real-world example — Ruler-scale measurements
A 30-scruple (apothecary) school ruler converts cleanly to maces — useful when buying a desk accessory from a retailer whose product specs use a different unit.
30 s ap × 0.3428571807 = 10.2857154195 mace
Real-world example — Hardware-scale dimensions
A 10-scruple (apothecary) fastener or component is about as long as a thumbnail. Mechanics and DIY enthusiasts convert between scruples (apothecary) and maces daily when mixing metric and imperial tools.
10 s ap × 0.3428571807 = 3.4285718065 mace
Scruple (apothecary) to Mace conversion table
Standard reference values for converting scruples (apothecary) to maces:
| Scruple (apothecary) [s ap] | Mace [mace] |
|---|---|
| 0.01 | 0.0034285718 |
| 0.1 | 0.0342857181 |
| 1 | 0.3428571807 |
| 2 | 0.6857143613 |
| 3 | 1.028571542 |
| 4 | 1.3714287226 |
| 5 | 1.7142859033 |
| 10 | 3.4285718065 |
| 20 | 6.857143613 |
| 30 | 10.2857154195 |
| 40 | 13.714287226 |
| 50 | 17.1428590325 |
| 100 | 34.2857180651 |
| 500 | 171.4285903253 |
| 1000 | 342.8571806507 |
Frequently asked questions
How many maces is 1 scruple (apothecary)?
How do I convert scruples (apothecary) to maces?
How do I convert maces back to scruples (apothecary)?
How many maces is 100 scruples (apothecary)?
Popular weight unit conversions
Convert Scruple (apothecary) to other weight units
Show all Scruple (apothecary) 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 s ap = 0.3428571807 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.