There are several ways to determine the carat of gold:

1. Stamp: You can check the stamp on a gold object such as a jewelry, necklace or bracelet. The stamp indicates the carat of gold. For example, "585" stamp is used for 14-carat gold. This means that the gold contains 58.5% pure gold.
2. Chemical test: You can perform a chemical test to determine the carat of gold. In this test, you try to determine the purity level of gold using an acid solution. With this method, the carat of gold can be determined with 100% accuracy.
3. Density test: You can use a density test to measure the density of gold. This method can be used to determine the purity level of gold because the density of gold increases as the purity level increases.
4. Color test: The color of gold can also provide information about the purity level. Pure gold is yellow in color, while gold alloys can be a paler or more greenish color.

By using one or more of these methods, you can determine the carat of gold. However, you may need the correct equipment and technical knowledge to obtain accurate results.