Convert Ratti to Carat (metric)
Convert rattis to carats (metric) instantly. 1 ratti = 0.6075 carat (metric) — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Carat (metric) to Ratti converter for the reverse conversion.
Units explained
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.
Carat (metric)
The metric carat (ct) equals exactly 200 milligrams (0.0002 kg).
From Arabic 'qirat' and Greek 'keration', the carob seed once used as a counterweight.
The worldwide standard for gemstone and diamond mass.
The metric carat was fixed at 200 mg internationally in 1907.
Ratti to Carat (metric) 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 rattis and carats (metric):
To convert rattis to carats (metric), multiply the value in rattis by 0.6075. To reverse, multiply carats (metric) by 1.646090535.
How to use this converter
Type a value into the calculator. The result in carats (metric) updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Carat (metric) to Ratti converter for the reverse direction.
Step-by-step: convert rattis to carats (metric)
- Write down the value in rattis (ratti).
- Multiply that value by the factor 0.6075.
- The product is the equivalent value in carats (metric) (ct).
- To reverse, multiply the carat (metric) value by 1.646090535.
Worked examples
Example 1 — Convert 1 ratti to ct:
1 × 0.6075 = 0.6075 ct
Example 2 — Convert 100 ratti to ct:
100 × 0.6075 = 60.75 ct
Real-world example — Hair-width scale measurements
A 70-ratti measurement (about the diameter of a human hair) is the kind of value materials engineers regularly express in adjacent micro-scale units like carats (metric) for direct comparison across supplier datasheets.
70 ratti × 0.6075 = 42.525 ct
Real-world example — Paper and film thicknesses
At the thickness of office paper (roughly 3 rattis), converting between sub-millimeter units is routine for packaging and printing buyers comparing quotes from metric and US suppliers.
3 ratti × 0.6075 = 1.8225 ct
Real-world example — Plastic-film thickness alternates
A 150-ratti plastic film converts cleanly to carats (metric) — useful for packaging buyers reconciling supplier datasheets across metric and US measurement systems.
150 ratti × 0.6075 = 91.125 ct
Ratti to Carat (metric) conversion table
Standard reference values for converting rattis to carats (metric):
| Ratti [ratti] | Carat (metric) [ct] |
|---|---|
| 0.01 | 0.006075 |
| 0.1 | 0.06075 |
| 1 | 0.6075 |
| 2 | 1.215 |
| 3 | 1.8225 |
| 4 | 2.43 |
| 5 | 3.0375 |
| 10 | 6.075 |
| 20 | 12.15 |
| 30 | 18.225 |
| 40 | 24.3 |
| 50 | 30.375 |
| 100 | 60.75 |
| 500 | 303.75 |
| 1000 | 607.5 |
Frequently asked questions
How many carats (metric) is 1 ratti?
How do I convert rattis to carats (metric)?
How do I convert carats (metric) back to rattis?
How many carats (metric) is 100 rattis?
Popular weight unit conversions
Convert Ratti to other weight units
Show all Ratti conversions
Metric / SI (18 units)
Avoirdupois (15 units)
Troy & Apothecary (10 units)
Indian / South Asian (5 units)
Scientific / Atomic (9 units)
Astronomical (4 units)
Biblical / Ancient (14 units)
Sources & references
Conversion factor (1 ratti = 0.6075 ct) 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.