NIOSH recently announced a mobile app aimed at calculating the risks involved in performing lifting tasks. The NIOSH Lifting Equation mobile application, NLE Calc, is a tool to calculate the overall risk index for single and multiple manual lifting tasks. The application provides risk estimates to help evaluate lifting tasks and reduce the incidence of low back injuries in workers.

https://www.cdc.gov/niosh/topics/ergonomics/nlecalc.html