To calculate life insurance cost, you must have a chart showing the cost per thousand dollars of coverage. You multiply that by the number of thousands of dollars of coverage you desire, then add the policy fee shown on the chart, to get your annual rate. If you want to pay monthly, quarterly, or semi-annually, you take the annual rate times a factor that should be shown on the chart.
Or you can go to a quote engine and input your face amount, health rating, and term length to see your life insurance cost. This should include the appropriate fees and factors.
The fine art of calculating cost of life insurance is best done by the insurance company actuaries. My personal opinion is to purchase the needed face amount and specific time period desired and adjust the premiums based on your budget. Your loved ones won't care if you save $10 per week when you die if your face amount was cut by $200,000 in order to save that $10. Work with an experienced independent broker and let them shop the market professionally to avoid costly mistakes.
Or you can go to a quote engine and input your face amount, health rating, and term length to see your life insurance cost. This should include the appropriate fees and factors.