What is the equivalent of whole to ground spices?

The substitution ratios for spices vary according to the spice. For example, one teaspoon of ground cinnamon is equivalent to three inches of cinnamon stick, and one-eighth of a teaspoon of ground garlic substitutes for one garlic clove. Use one-fourth of a teaspoon ground cloves instead of three whole cloves.

Substitute half a teaspoon of ground anise for one star anise. Two teaspoons of onion powder equal one-third of a cup of fresh, chopped onion.

When substituting dried, ground herbs for fresh, whole herbs, the ratio is more straightforward: use one-third of the amount. For example, use one teaspoon of dried basil instead of one tablespoon of fresh basil.