Islam will be the largest religion in the world by 2070 and India will have the world’s largest Muslim population by 2050 according to a survey conducted by the American think tank Pew Research Centre.

The survey said that if the current demographic trends continue, the Muslim population is expected to exceed the number of Christians by the end of this century. At present, Christianity is the world’s largest religion.

In a 2015 report, Pew said that while the world's population is projected to grow 35 percent in the coming decades, the number of Muslims is expected to increase by 73 percent -to 2.8 billion in 2050. In fact, Muslims are the only major religious group projected to increase faster than the world's population as a whole, the think tank said. There were 1.6 billion Muslims in the world as of 2010 - roughly 23% of the global population - according to a Pew estimate. 

At 62 percent, a majority of the Muslims globally live in the Asia-Pacific region. This included large populations in Indonesia, India, Pakistan, Bangladesh, Iran and Turkey, Pew said. Indonesia is currently the country with the world's largest Muslim population, but Pew Research Centre projects that India will have that distinction by the year 2050, with more than 300 million Muslims.

Muslims are expected to grow as a percentage of every region except Latin America and the Caribbean, where relatively few Muslims live, Pew said in 2015 when it first indicated Muslims might be becoming the largest religious group in the world.

The research cites fertility as one of the major reasons behind the demographic change, placing Muslims with the highest rate of reproduction at 3.1 children per woman followed by Christians at 2.7.

Another reason is people moving away from Christianity as the report predicts around 40 million Christians to convert while another 106 million to become non-religious.