How many liters of water to fill an aquarium?

To determine how many liters of water are needed to fill an aquarium, you first need to know its dimensions (length, width, and height) in centimeters. Multiply these three measurements together to get the volume in cubic centimeters, then divide by 1,000 to convert it to liters. For example, a 100 cm x 40 cm x 50 cm aquarium would require 200 liters of water (100 x 40 x 50 = 200,000 cm³; 200,000 ÷ 1,000 = 200 liters).