What is the difference between ml and tsp when measuring ingredients for a recipe?

The main difference between milliliters (ml) and teaspoons (tsp) when measuring ingredients for a recipe is the volume they represent. Milliliters are a metric unit of measurement, while teaspoons are a unit of measurement commonly used in cooking. One milliliter is equal to about 0.2 teaspoons, so you would typically use more teaspoons than milliliters when measuring ingredients.