one and a half to two
One fresh bunch of thyme is roughly equivalent to one teaspoon of dried thyme.
With thyme one fresh sprig equals one-half teaspoon of dried thyme. In general, use two to three times the amount of fresh thyme as dried. When adding to soups and stews, crush the leaves between your hands before stirring it in your recipe.
Generally, one sprig of fresh thyme is equivalent to about 1/3 teaspoon of dried thyme. Therefore, 12 sprigs would equal approximately 4 teaspoons of dried thyme. If you prefer to measure in tablespoons, that would be about 1 tablespoon plus 1 teaspoon of dried thyme. Keep in mind that dried herbs are more concentrated in flavor than fresh ones, so adjust to taste if needed.
One small sprig of rosemary converts to 1/2 a teaspoon of dried rosemary.
1 teaspoon
The rule of thumb is: 1 teaspoon dried herb = 1 tablespoon fresh herb
Typically, when substituting thyme powder for fresh thyme, use about one-third the amount of powder as you would fresh. Since dried herbs are more concentrated, you would need approximately 1 teaspoon of thyme powder to replace 1 tablespoon of chopped fresh thyme. Adjust to taste, as the intensity of flavor can vary.
Dried herbs are normally twice as strong as fresh, so 1/2 a tsp.
There are approximately 48 teaspoons in a pound of dried thyme. Since a typical teaspoon of dried thyme weighs about 1 gram, and there are about 454 grams in a pound, you can calculate that 454 grams divided by 9 grams (the weight of a teaspoon) equals around 48 teaspoons. However, it's important to note that fresh thyme has a different weight-to-volume ratio.
I am sorry but you can't turn dried sage int to fresh thyme...
I will repeat an answer found within the other good answers: Rule of thumb is 1 tsp dried herb substituted for 1 tablespoon fresh herb.
To substitute dried thyme for fresh thyme, the general guideline is to use one-third of the amount. Therefore, if a recipe calls for 1 cup of fresh thyme, you would use about 1/3 cup of dried thyme. However, dried herbs are more concentrated in flavor, so adjusting to taste is always a good idea.