1 litre = 1,000 cubic centimetres. To convert a value in litres to cubic centimetres, multiply by 1,000.
There are 1000 cm3 in a L.
1 Liter is equal to 1000 cubic centimeters
1000 cm3 = 1 litre so 18000 cm3 = 18000/1000 litres = 18 litres.