On my physical person, three (1 large folder, 1 small fixed, and 1 multi-tool).
But I also have in my bag (as backups) 1 smaller MT, 1 smaller folder, and 1 larger fixed blade.
And if we move on to my vehicle, throw in 1 small folder w/ glass-breaker, 2 very large fixed blades, 2 Mora's,
a larger MT, and a bow saw and small axe for good measure....
So I'm maxed out with a cool dozen... until I get home - LOL!