For instance, say you have 3 liters. Simply multiply 3 liters by 1,000 to get 3,000 milliliters. Therefore, 3 L = 3,000 mL.
For instance, let’s say you have 7,500 milliliters. Divide 7,500 milliliters by 1,000 to get 7. 5 liters. So, 7,500 mL = 7. 5 L.