Everyone's situation is different but the rule of thumb is approximately 10x your annual income. However, to do a more comprehensive dive into how much you need, you can use the DIME theory.
This formula encourages you to take a more detailed look at your finances. DIME stands for debt, income, mortgage, and education, four areas that you need to consider when calculating your life insurance needs.
Debt and final expenses: Add up your debts, other than your mortgage, plus an estimate of your funeral expenses.
Income: Decide how many years your family would need support, and multiply your annual income by that number.
Mortgage: Calculate the amount you need to pay off your mortgage.
Education: Estimate the cost of sending your kids to school and college.
By adding all of these together, you get a much more well-rounded view of your needs. However, while this formula is more comprehensive, it doesn’t account for the life insurance coverage and savings you already have. It also doesn’t consider the unpaid contributions a stay-at-home parent makes.