How many milliliters are in one teaspoon?

One teaspoon is equivalent to 5 milliliters. This conversion is widely recognized in both culinary and medical contexts. Understanding this measurement is crucial, especially for medication administration, where precise dosing is essential for patient safety. Therefore, knowing that one teaspoon equals 5 milliliters ensures that caregivers can accurately measure and administer liquid medications according to prescribed dosages, thereby improving treatment efficacy and minimizing the risk of errors.