* Conversions:
* 1 quart = 946.353 milliliters (mL)
* Calculation:
* Half a quart = 1/2 quart = 0.5 quarts
* 0.5 quarts * 946.353 mL/quart = 473.1765 mL
Therefore, half a quart is approximately 473.18 milliliters.