Convert Scruple (apothecary) to Pound
Convert scruples (apothecary) to pounds instantly. 1 scruple (apothecary) = 0.0028571429 pound — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Pound 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.
Pound
The pound (lb) is a unit of mass equal to exactly 0.45359237 kilogram.
From Latin 'libra pondo' (a pound by weight); the symbol lb comes from 'libra'.
The primary weight unit in the United States and informally in the UK.
The international avoirdupois pound was fixed in the 1959 yard-and-pound agreement.
Scruple (apothecary) to Pound conversion formula
The relationship between scruples (apothecary) and pounds:
To convert scruples (apothecary) to pounds, multiply the value in scruples (apothecary) by 0.0028571429. To reverse, multiply pounds by 350.
How to use this converter
Type a value into the calculator. The result in pounds updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Pound to Scruple (apothecary) converter for the reverse direction.
Step-by-step: convert scruples (apothecary) to pounds
- Write down the value in scruples (apothecary) (s ap).
- Multiply that value by the factor 0.0028571429.
- The product is the equivalent value in pounds (lb).
- To reverse, multiply the pound value by 350.
Worked examples
Example 1 — Convert 1 s ap to lb:
1 × 0.0028571429 = 0.0028571429 lb
Example 2 — Convert 100 s ap to lb:
100 × 0.0028571429 = 0.2857142857 lb
Real-world example — Furniture and large objects
A 72-scruple (apothecary) piece of furniture converts to a value in pounds that's easier to mentally compare with room dimensions. This is the typical workflow when shopping internationally and product specs use a different unit than your room measurements.
72 s ap × 0.0028571429 = 0.2057142857 lb
Real-world example — Children's height milestones
A 150-scruple (apothecary)-tall child measures a value in pounds that's commonly used for theme-park ride height requirements when travelling between countries that use different measurement units.
150 s ap × 0.0028571429 = 0.4285714286 lb
Real-world example — Body height conversion
You enter your height as 180 scruples (apothecary) into an international job or visa application. The form then asks for the same value in pounds — converting between these adjacent units is one of the most-used length conversions globally.
180 s ap × 0.0028571429 = 0.5142857143 lb
Scruple (apothecary) to Pound conversion table
Standard reference values for converting scruples (apothecary) to pounds:
| Scruple (apothecary) [s ap] | Pound [lb] |
|---|---|
| 0.01 | 2.857143e-5 |
| 0.1 | 0.0002857143 |
| 1 | 0.0028571429 |
| 2 | 0.0057142857 |
| 3 | 0.0085714286 |
| 4 | 0.0114285714 |
| 5 | 0.0142857143 |
| 10 | 0.0285714286 |
| 20 | 0.0571428571 |
| 30 | 0.0857142857 |
| 40 | 0.1142857143 |
| 50 | 0.1428571429 |
| 100 | 0.2857142857 |
| 500 | 1.4285714286 |
| 1000 | 2.8571428571 |
Frequently asked questions
How many pounds is 1 scruple (apothecary)?
How do I convert scruples (apothecary) to pounds?
How do I convert pounds back to scruples (apothecary)?
How many pounds 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 = 0.0028571429 lb) 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.