What does 1.5 lt mean in an Italian recipe?

In Italian recipes, "1.5 lt" stands for "1.5 litri," which translates to "1.5 liters." It is a metric unit of volume commonly used in Italy and many other countries to measure liquids. 1 liter is equivalent to 1000 milliliters (ml) or approximately 33.81 fluid ounces.

Therefore, 1.5 lt in an Italian recipe refers to a quantity of 1.5 liters or 1500 milliliters of a liquid ingredient, such as water, milk, broth, or oil.