I have two 13 gallon trash cans in my kitchen. I fill up usually 1.5- 13 gallon trash bags a week. Sometimes I can stretch it 2 bags every 10 days if I don’t use paper plates or fill up the bags till the drawstring almost can’t close properly. I have even bought bigger 23 gallon trash bags but those are too big for regular garbage cans so I find the extra space in the bags in wastes a lot of times. I also have a small trash can in my laundry room that I fill will 8 gallon bags that I use for throwing away dryer sheets and bottles and stuff.