How Do You Convert Carats to Stones?
Multiply carats by 0.0000314857 to get stones. The formula is: Stones = Carats x 0.0000314857. This works because 1 carat = 0.2 grams and 1 stone = 6,350.29 grams, so 0.2 / 6,350.29 = 0.0000314857.
Sam Okafor is explaining gemstone weight to a British client who thinks in stones. The client has a collection totaling 500 carats. Converting: 500 x 0.0000314857 = 0.0157429 stones. Sam tells her that her entire gemstone collection weighs about 100 grams — far less than a single stone of body weight.
Carats to Stones Reference Table
| Carats | Stones | Also Equals |
|---|---|---|
| 1 ct | 0.0000315 st | 0.2 g |
| 100 ct | 0.0031486 st | 20 g |
| 500 ct | 0.0157429 st | 100 g |
| 1,000 ct | 0.0314857 st | 200 g |
| 5,000 ct | 0.1574287 st | 1,000 g |
| 10,000 ct | 0.3148574 st | 2,000 g |
| 31,751.5 ct | 1.0000000 st | 6,350.29 g |
Practical Applications
Bulk Gemstone Shipping
Priya Patel coordinates a promotional campaign for a UK jewelry retailer receiving a shipment of 25,000 carats of mixed gemstones. She converts to stones for the British shipping manifest: 25,000 x 0.0000314857 = 0.787 stones (about 5 kg). The compact weight surprises the logistics team, who expected a heavier package for such a valuable shipment.
Educational Comparisons
Maya Singh prepares a science presentation comparing units of measurement. She calculates that a 150-pound person (10.71 stones) would weigh about 340,194 carats. Her classmates find it amusing that a person weighs over a third of a million carats, putting gemstone weights in perspective.
Jewelry Collection Appraisal
Tom Brewer helps his neighbor catalog inherited jewelry for insurance. The collection totals 87.3 carats across rings, bracelets, and necklaces. Converting: 87.3 x 0.0000314857 = 0.002749 stones, or about 17.46 grams. He notes that the entire collection weighs less than a single AA battery.