They are not equivalent. Ground coriander is the seed whereas fresh coriander is the leaf of the plant. They are different flavors and cannot be substituted.
1 teas
One Euro for a bunch.
6 grams of coriander seeds =how mady grams of coriander powder
One tbsp of fresh coriander would be one teaspoon of dried and vice-versa. That is a three to one ratio. This formula works for all herbs. Just remember 1tbsp fresh = 1 tsp. dried. Packaged dried herbs are stronger than fresh herbs, but lose their potency as they age. If the container is new then use a bit more sparingly. Fresh herbs are the way to go to get the best results.
2 grams
Coriander is an herb that has two primary forms: leaves and fruit. The leaves are typically sold as an herb called cilantro in the United States and the fruit is typically sold as whole coriander seeds or ground coriander. The flavor of the leaves is very different than the flavor of the fruit and I would not recommend substituting one for the other. Cilantro is typically used in Mexican cuisine and Coriander is typically used in Indian cuisine. It is one of the ingredients in garam masala for example. If you can't find fresh cilantro, you could substitute parsley. The flavor would not be the same but it is a better choice than using ground coriander seeds.
Typically, a bunch of fresh dill contains about 1/2 to 1 ounce, depending on the size of the bunch. This is equivalent to roughly 1 cup of chopped fresh dill.
How much parsley is 1/4 bunch
Use 1/3 or 1/2 of the fresh amount. So, if the recipe calls for 1 teaspoon fresh cilantro, you use 1/3 or 1/2 teaspoon of dried.
One fresh bunch of thyme is roughly equivalent to one teaspoon of dried thyme.
103 grams
There are ~68 sprigs per bunch and each bunch equals 1/2 cup chopped, so there is approx. 6.8 sprigs fresh per each teaspoon dried.