Half a teaspoon equals how many milliliters?

Half a teaspoon equals how many milliliters?

• A. 2.5 mL
• B. 0.5 mL
• C. 5 mL
• D. 1 mL

Answer: (A)

Converting teaspoons to milliliters is the key idea here. 1 teaspoon equals 5 milliliters, so to find half a teaspoon you multiply by 0.5: 0.5 × 5 mL = 2.5 mL. Therefore, half a teaspoon is 2.5 mL. In practice, this means measuring 2.5 mL with a syringe or dropper when a half-teaspoon dose is required. The other amounts correspond to different fractions of a teaspoon (0.5 mL is a tenth of a teaspoon, 5 mL is a full teaspoon, 1 mL is a fifth), not half of it.

Converting teaspoons to milliliters is the key idea here. 1 teaspoon equals 5 milliliters, so to find half a teaspoon you multiply by 0.5: 0.5 × 5 mL = 2.5 mL. Therefore, half a teaspoon is 2.5 mL. In practice, this means measuring 2.5 mL with a syringe or dropper when a half-teaspoon dose is required. The other amounts correspond to different fractions of a teaspoon (0.5 mL is a tenth of a teaspoon, 5 mL is a full teaspoon, 1 mL is a fifth), not half of it.