Here's how to get free coffee on National Coffee Day

Friday is National Coffee Day - and that means free coffee at many chains across America.

Chains including Tim Hortons, Dunkin' Donuts, and Krispy Kreme are handing out free drinks on Friday.

At some chains, the deals continue into the weekend and even next week.

Here's a list of deals, so you can plan your National Coffee Day for maximum caffeination and minimum money spent.