I am trying to understand how to calculate the amount of force applied using a given lever. I am by no means a physics expert and was unable to find an answer to this question online, or at least not one I could understand.

I am from the US and use imperial measurements so I have a basic understand that 1 pound of force applied to the end of a 1 foot lever will produce 1 lb-ft of torque, 2 pounds is 2 lb-ft, etc.

I want to know if that force is also increased linearly with length. For example would 1 pound applied to the end of a 2 foot lever produce 2 lb-ft, 1 pound applied to a 3 foot lever produce 3 lb-ft? If not is there some formula I can use to calculate how much force is being applied given an N length lever?