How Many Megabytes for One Minute of Conversation?

For the best estimate, consult multiple months and average the totals.

You will want to differentiate between the types of calls you make.

There are calls that need to go through GSM.

Finally, round the value up to 0.5 MB per minute of conversation.

The G.729 codec is one of the best performing voice codecs and most VoIP services use it.

Final Considerations

Other parameters may affect these values.

Also, you may not know which codec is being used.

To that end, it’s safe to assume an average value of 50 kbps for any codec.

This gives an estimate of roughly 0.75 MB per minute of conversation.

So, if you have an hour-long conversation, it will consume roughly 45 MB of data.