Convert Quarters to Carats
Convert Quarters (qr) to Carats (ct) instantly and accurately.
Conversion Formula
ct = qr × 63502.9318
About Quarters
A quarter (qr) in the avoirdupois system equals 28 pounds or one quarter of a hundredweight - approximately 12.70 kg. Historically, quarters were used in British trade for measuring grain, wool, and other bulk commodities. The British quarter of grain (28 lb) was the standard purchase quantity at markets and mills throughout medieval and early modern England. In the US, the term 'quarter' sometimes refers to a quarter of a short hundredweight (25 lb) rather than the British 28 lb.
About Carats
A metric carat (ct or CD) is exactly 200 milligrams (0.2 g), the universal standard for weighing gemstones. Established internationally in 1907, it replaced fractionally different regional carat weights previously used in different countries. The total weight of a diamond or colored gemstone is always expressed in carats: a 1.00 ct diamond of excellent cut and color can command over $5,000. The Cullinan diamond, the largest gem-quality rough diamond ever found, weighed 3,106.75 carats.
Quick Reference Table
| Quarters (qr) | Carats (ct) |
|---|---|
| 1 qr | 63502.9 ct |
| 2 qr | 127006 ct |
| 5 qr | 317515 ct |
| 10 qr | 635029 ct |
| 25 qr | 1587570 ct |
| 50 qr | 3175150 ct |
| 100 qr | 6350290 ct |