Carat to Ratti Calculator
Convert carat to ratti, or ratti to carat, with this free gemstone weight calculator. You can also convert grams and milligrams. This tool uses 1 carat = 1.09375 ratti; check the conversion convention before comparing a seller's weight.
1 Carat = 1.09375 Ratti
1 Ratti ≈ 0.9143 Carat
1 Carat = 0.2 Gram
1 Carat = 200 Milligrams
Which Ratti Conversion Does This Calculator Use?
This carat to ratti calculator uses 1 carat = 1.09375 ratti. Using the same factor in reverse, 1 ratti is approximately 0.9143 carat, or 0.1829 gram. All ratti results and examples on this page follow this convention.
Ratti values can differ between measurement conventions. Before comparing a seller's ratti weight with a laboratory report in carats, confirm the seller's grams-per-ratti value. If their convention differs, this calculator's ratti result will not match their listing. A metric carat, by contrast, equals 0.2 gram or 200 milligrams.
How to Use the Carat to Ratti Converter
Enter a gemstone's weight in any one of the four fields: Carat, Ratti, Gram or Milligram. The other fields update automatically. To convert ratti to carat, enter the weight in the Ratti field. Use Reset Calculator to clear all fields before starting a new conversion.
For example, entering 5 carats gives 5.4688 ratti, 1 gram and 1,000 milligrams. The calculator displays carat, ratti and gram results to four decimal places and rounds milligrams to the nearest whole number.
Carat to Ratti Conversion Chart
Use this chart to compare common gemstone weights. Ratti values are rounded to four decimal places using this calculator's factor of 1.09375.
| Carat (ct) | Ratti | Gram (g) | Milligram (mg) |
|---|---|---|---|
| 1 | 1.0938 | 0.2 | 200 |
| 2 | 2.1875 | 0.4 | 400 |
| 3 | 3.2813 | 0.6 | 600 |
| 4 | 4.3750 | 0.8 | 800 |
| 5 | 5.4688 | 1.0 | 1000 |
| 6 | 6.5625 | 1.2 | 1200 |
| 7 | 7.6563 | 1.4 | 1400 |
| 8 | 8.7500 | 1.6 | 1600 |
| 9 | 9.8438 | 1.8 | 1800 |
| 10 | 10.9375 | 2.0 | 2000 |
Carat to Ratti and Ratti to Carat Formulas
Use the same factor in both directions to keep your conversions consistent. Divide by 1.09375 when converting ratti back to carats instead of multiplying by a rounded inverse.
| Conversion | Formula | Example |
|---|---|---|
| Carat to ratti | Ratti = carat × 1.09375 | 5 ct = 5.4688 ratti |
| Ratti to carat | Carat = ratti ÷ 1.09375 | 5 ratti ≈ 4.5714 ct |
| Carat to gram | Gram = carat × 0.2 | 5 ct = 1 g |
| Gram to carat | Carat = gram ÷ 0.2 | 1 g = 5 ct |
| Carat to milligram | Milligram = carat × 200 | 5 ct = 1,000 mg |
What to Check When Comparing Gemstone Weights
Compare the loose stone's weight with the weight on its matching laboratory report. A ring's total weight includes its metal setting and cannot be used as the gemstone's weight. Carat measures gemstone mass; karat refers to gold purity. Equal carat weights also do not guarantee equal dimensions, because gemstone density and cutting proportions differ.
This tool converts weight units. It does not identify a stone, calculate its price or choose an astrological gemstone weight. For a separate recommendation tool, explore our gemstone calculator based on birth details. When browsing gemstones at AstroSage Shop, compare the listed carat weight and report details before purchasing.
Frequently Asked Questions
How many ratti are in 1 carat?
Under this calculator's convention, 1 carat equals 1.09375 ratti. Confirm the ratti definition used by your seller before comparing weights.
How many carats are in 1 ratti?
Divide 1 by 1.09375. The result is approximately 0.9143 carat using this calculator's conversion factor.
How much is 5 ratti in carats?
Using this calculator, 5 ratti is approximately 4.5714 carats, or 0.9143 gram. These values are rounded to four decimal places.
How many ratti are in 1 gram?
One gram equals 5 carats. Multiplying 5 by 1.09375 gives 5.46875 ratti, displayed as 5.4688 ratti in this calculator.
Why do different ratti calculators show different results?
They may use different ratti-to-gram conventions or round their results differently. Compare each tool's stated conversion factor before relying on the result.
Can I convert sapphire, emerald and ruby weights with this tool?
Yes. Weight conversion does not depend on gemstone type. The same factor applies to sapphire, emerald, ruby and other stones, provided the same ratti convention is used.
Does this calculator tell me which gemstone weight to wear?
No. It converts an existing weight between units. It does not assess a birth chart or recommend how many carats or ratti you should wear.