1000 milliliters (ml) is equal to 1 liter (L) . This means that if you have 1000 ml of a substance, you have 1 liter of that substance. The conversion factor from ml to L is 0.001, which means that to convert ml to L, you need to divide the number of ml by 1000. Therefore, 1000 ml divided by 1000 equals 1 L.