The amount of torque that a human can apply by hand varies depending on the person's strength, grip size, and leverage. Generally speaking, the average person can generate around 40 to 60 foot-pounds (54 to 81 Nm) of torque with their bare hands. However, if a person has a strong grip and is using tools or machines to amplify their force, they could potentially generate much more torque. For example, someone using a wrench or lever could easily multiply their force several times over, resulting in hundreds or even thousands of foot-pounds (1350 to 1800+ Nm) of torque.