I have a plastic pot but I don't know if it's 5 gallon or 3 gallon. How do you tell? Is there a way to measure it?

I want to put my cayenne pepper plant into a pot and the minimum size is 5 gallon. Thanks

The way to measure your pot size is to find a container of a verifiable size and measure dirt into your container. One gallon is pretty easy to find: nursery pots are the most obvious. Various kitchen containers are gallons or half gallons. To give you a sense of scale, those big buckets with handles from all sorts of industrial products are five gallons. Coincidentally, a friend just texted me the same question yesterday and I took this picture


The bucket is five gallons. The pot on the left is what nurseries are selling as the "5 gallon" plant size, but they are actually closer to four. Sometime back Amazon was showing "five gallon" nursery pots and the product description said 4.4 gallons. Go figure

Another way is to find out in what size of pot your pepper plant is sold. If it is 1 gallon you can eye-ball it which pot can fit your pepper plant pot 5x. And you can see the pots sold at the same place. Sometimes they have signs how many gallons the pots can hold=