The other goal of your life insurance policy is to help replace your salary for those that rely on that paycheck for basic needs. (lifeinsurancebyjeff.com)
You can see Publication 15 for the table of how much would be withheld based on your paycheck, and how the number of exemptions affects this. (money.stackexchange.com)
If your family depends on your paycheck then you want to make sure you replace it. (locallifeagents.com)