Which of this is smallest ml l kl in math?

In terms of volume, milliliters (ml) are the smallest unit among milliliters (ml), liters (l), and kiloliters (kl). Specifically, 1 liter equals 1,000 milliliters, and 1 kiloliter equals 1,000 liters. Therefore, 1 milliliter is much smaller than both 1 liter and 1 kiloliter.