There is a standard unit for risk of death call the micromort!

A micromort is a unit of risk of death measuring one in a million probability of death. Micromorts can be used to measure riskiness of day-to-day activities. For every hour you live, you accumulate 1.63 micromorts. 

This is partly how insurance companies can calculate how risky you are. Then the average risk of dying per day can be calculated from the average lifespan. About 39 micromorts are accumulated daily. A person who lives for 70 years dies after 25,550 days according to this system.

Ronald A. Howard pioneered decision analysis and introduced the micromort. He’s a professor at Stanford University. Since pioneering decision analysis in 1966 he has been developing the field. Howard directs teaching and research at Stanford and is the Director of the Decisions and Ethics Center which examines the efficacy and ethics of social arrangements. 

His current research is moving towards a coercion free society and improving the quality of decision making.

(Source)