Choose a category below and convert between units quickly and accurately.
Result
1 Grain = 0.32399455 Carat
Our weight converter utilizes high-precision mathematical constants to ensure accuracy across metric and imperial systems.
| Grain (gr) | Carat (ct) |
|---|---|
| 1 gr | 0.32399455 ct |
| 2 gr | 0.6479891 ct |
| 5 gr | 1.61997275 ct |
| 10 gr | 3.2399455 ct |
| 25 gr | 8.09986375 ct |
| 50 gr | 16.1997275 ct |
| 100 gr | 32.399455 ct |
| 250 gr | 80.9986375 ct |
| 500 gr | 161.997275 ct |
| 1000 gr | 323.99455 ct |
Formula
Carat = Grain × 0.32399455
Worked Example
Example: 5 Grain = 5 × 0.32399455 = 1.61997275 Carat
To convert Grain to Carat, multiply the Grain value by 0.32399455. This factor is derived from the ratio between the two units.
The grain is a unit of mass equal to approximately 64.8 milligrams. It is one of the oldest units of weight and is still used in ballistics for measuring bullet and gunpowder weights, and in pharmacy for drug formulations.
History
The grain is based on the weight of a single grain of wheat or barley. It was historically the smallest unit in the English weight system. One pound avoirdupois equals 7,000 grains, and one troy ounce equals 480 grains.
The carat is a unit of mass used for measuring gemstones and pearls. One carat equals 200 milligrams (0.2 grams). It should not be confused with 'karat,' which measures the purity of gold.
History
The word 'carat' derives from the Greek 'keration,' referring to carob seeds that were historically used as counterweights on balance scales due to their uniform weight. The modern metric carat of 200 mg was adopted internationally in 1907.
Calculated using the latest NIST standards for physical constants and unit ratios.
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Each category converts first through a base unit, then into the destination unit. That keeps the math consistent across metric and imperial systems and makes it easier to explain how results are generated.
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