Three-quarters of a teaspoon of ground thyme is equivalent to one teaspoon of dried thyme. To convert recipe amounts, multiply the required amount of dried thyme by 0.75 to get the equivalent amount of ground thyme. When substituting dried thyme for ground thyme, divide the required amount of ground thyme by 0.75 to find the amount of dried thyme to use.
Fresh thyme is another substitution option for dried thyme. One tablespoon of chopped fresh thyme or six average-sized sprigs equals one teaspoon of dried thyme. Dried spices lose some of their flavor during long storage periods. Increase your spice amounts if they have been stored for awhile.