How many Protestants today in the world ? 800 millions

This is one of the many questions the Pew Forum on Religion and Public Life helps to answer, due to a huge world survey on contemporary Christianity.

This comprehensive demographic study of more than 200 countries finds that there are 2.18 billion Christians of all ages around the world, representing nearly a third of the estimated 2010 global population of 6.9 billion. To know more, click here.