What is the best way to train a neutered cat who is used to "going" outside for bathroom to use a litter box?

I have a neutered cat about 11 months old. He is used to going outside for bathrooming when my dogs go out. He stays outside several hours a day and sleeps inside at night and off/on during the day. Now that weather is cold I would like to keep him inside more but not sure how to go about training him for the litter box.

i hav no idea

Set him in the litter box every hour or every few hours. If he stands by the door wanting to go out, set him in the litter box. If you catch him trying to go inside the house, set him in the litter box. Cats are pretty smart and will catch on quickly.

Shannon offers great advice!Typically it won't take long at all to get your kitty used to the litter box. Cats bury signs of "bathroom breaks" as a matter of instinct. (It's very helpful in the wild to keep them off the radar of other animals).My cat was a stray when we got him, who know if he was litter box trained initally, but it took less than a day to get him acclimated to the box.Best of luck!

I did this for my cat, put some dirt from outside in the litter box on top of the the cat litter (use cheap litter to not mask the dirt scent) and place it in the bathroom and the cat. Place the cat in the box and close the door and leave it in the bathroom. After it uses the box a couple of times, you can place it where you want it. Then put your cat in it and repeat doing this a couple of times during the day so the cat knows where to find it. Each time you change the box use less dirt and alittle good litter, after a couple of changings, pure litter. GOOD LUCK.

Only thing I can add is to move his paws thru the litter while you have him in the pan the first few times

Most cats will naturally go to a litter box. If you are wanting to break your cat from going outside that will be very hard. All animals enjoy fresh air and to keep him inside all the time may make him unhappy.