Compared to 8 million in 2012, about 35 million people are now buying everything from apparel to electronics to cosmetics and furniture from online stores.
This number is expected to grow almost three times to 100 million in the next two years.
India is estimated to have 302 million Internet users by December 2014, overtaking the US as the world's second largest online userbase.
India's etailing market is at an inflection point and will see rapid growth to become a USD 15 billion market by 2016, he added.
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According to analysts, the eCommerce market in India is currently estimated to be worth about USD three billion.
They are shopping across categories like apparel, beauty and skincare, home furnishing, baby products and jewellery.
Also, over two-thirds respondents highlighted that they preferred shopping online for convenience and variety along with discounts.
The research was conducted by Forrester Consulting across 6,859 respondents.
Over 60 per cent respondents said buying online was directly correlated with social status.