Based on SparkPeople's BMR article, (which needs pen & paper to tabulate), I created an online calculator you can use.
Just paste this address into your web browser.
?'s: just contact me.
When I started last week on SparkPeople.com, the site had SO much information it seemed overwhelming. But using the SparksPoints page helped me explore the wealth of resources here, and have fun gaining points in the process!