Hmm, its not a surprise to me anymore has Glo has recently launched its own data calculator now MTN follows this update and has decided to launch its own, they have seen the usefulness of this function to subscribers.
MTN Data Calculator will serve subscribers better by engaging them more on the network and allowing them to determine their data usage and consumption pattern.
Function of MTN Data calculator
How MTN Estimate Data Usage
MTN said 1 minutes surfing on the web is equated to 1MB,
1Minute on social media (posting and commenting) is equated to 4MB etc.
1minute of streaming music is equal to 4MB.
and more which can be found on mtn data calculator page when visited.