I might be off by one or two, but I counted them in Creative Mode, and I came up with 300 without any mod items. And this number is also technically off, because I did not count any of the potions you can make.
Chat with our AI personalities
Not including potions, there are 300 items and blocks if it isn't modded.
Once you have installed Too Many Items, when you bring your inventory up, you can choose from a list of blocks/items that appears by the side and click them into your inventory.
Minecraft characters are approximately 2 blocks high.
309,987,908,986,098,890,120,012,210.
4 blocks.