Usage (uploaded and downloaded data) on device1

Activity Mobile phones, Smartphones and Internet Devices
1 email (text only) 0.035 MB
1 email with Word® 0.30 MB
Photo upload/download (Standard Resolution) 1 MB
Photo upload/download (High Resolution) 4 MB
1 web page 0.50 MB
1 minute of streaming video (YouTubeTM, standard quality) 3 MB/min
1 minute of streaming video (YouTubeTM, High definition) 6 MB/min
1 instant message (50 characters in length) 0.03 MB
1 song (4 minutes in length) 4 MB

1024 KB = 1 MB
1024 MB = 1 GB
Usage in KB ÷ 1024 = Usage in MB
Usage in MB ÷ 1024 = Usage in GB
Usage in GB x 1024 = Usage in MB
Usage in MB x 1024 = Usage in KB

The information above is intended as an estimate only. Frequency of use and size of photos, videos, web pages, file attachments, applications, and other data usage varies widely and could result in data usage exceeding allotment in your plan.