The workers at the place where i bought my pots didn't know how many litres they were, i judged they must be about 7 litres since they were 8" tall, 8" across the top and 6" across the bottom.
I wanted to find out how much they really held so i looked for and found a formula that gives you the volume of a plant pot (in maths it's called a frustum of a cone), it gives the volume in cubic centimetres :
Calculate volume of a truncated cone and its surface area (mobile)
I plugged in my plant pots numbers and the result is 19,373.154697 cubic centimetres.
I then type in 'convert 19,373.154697 cubic centimetres to gallons' and got the answer 4.26149651 gallons, in litres this is 19.373 litres !
There's no way my plant pot is 19 litres at that size is there ? Am i missing something ??