Convert Scruple (apothecary) to Ratti
Convert scruples (apothecary) to rattis instantly. 1 scruple (apothecary) = 10.6664872428 ratti — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Ratti 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.
Ratti
The ratti equals about 0.1215 gram, the smallest traditional South Asian weight.
Based on the seed of the Gunja plant (Abrus precatorius), or 'raktika' in Sanskrit.
Gemstones and gold in Indian and South Asian jewelry.
One of the oldest weight units of the Indian subcontinent, later standardized.
Scruple (apothecary) to Ratti 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 rattis:
To convert scruples (apothecary) to rattis, multiply the value in scruples (apothecary) by 10.6664872428. To reverse, multiply rattis by 0.093751577.
How to use this converter
Type a value into the calculator. The result in rattis updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Ratti to Scruple (apothecary) converter for the reverse direction.
Step-by-step: convert scruples (apothecary) to rattis
- Write down the value in scruples (apothecary) (s ap).
- Multiply that value by the factor 10.6664872428.
- The product is the equivalent value in rattis (ratti).
- To reverse, multiply the ratti value by 0.093751577.
Worked examples
Example 1 — Convert 1 s ap to ratti:
1 × 10.6664872428 = 10.6664872428 ratti
Example 2 — Convert 100 s ap to ratti:
100 × 10.6664872428 = 1066.6487242798 ratti
Real-world example — Adjacent small-scale precision
One scruple (apothecary) equals 1,000 rattis — the standard sub-millimeter precision conversion that materials engineers use whenever they switch between bulk material thickness specs (larger unit) and surface-finish characteristics (smaller unit).
1 s ap × 10.6664872428 = 10.6664872428 ratti
Real-world example — Adjacent metric sub-units
One scruple (apothecary) equals 1,000 rattis. Engineers move between these scales constantly: PCB feature sizes in the larger unit, wire-bond diameters in the smaller.
1 s ap × 10.6664872428 = 10.6664872428 ratti
Scruple (apothecary) to Ratti conversion table
Standard reference values for converting scruples (apothecary) to rattis:
| Scruple (apothecary) [s ap] | Ratti [ratti] |
|---|---|
| 0.01 | 0.1066648724 |
| 0.1 | 1.0666487243 |
| 1 | 10.6664872428 |
| 2 | 21.3329744856 |
| 3 | 31.9994617284 |
| 4 | 42.6659489712 |
| 5 | 53.332436214 |
| 10 | 106.664872428 |
| 20 | 213.329744856 |
| 30 | 319.994617284 |
| 40 | 426.6594897119 |
| 50 | 533.3243621399 |
| 100 | 1066.6487242798 |
| 500 | 5333.2436213992 |
| 1000 | 10666.4872427984 |
Frequently asked questions
How many rattis is 1 scruple (apothecary)?
How do I convert scruples (apothecary) to rattis?
How do I convert rattis back to scruples (apothecary)?
How many rattis 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 = 10.6664872428 ratti) 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.