How do you calculate the number of bytes in 1MB (megabyte)? October 01, 2018 02:41 Updated Follow SORACOM uses the following for calculating byte conversion: 1 gigabyte (GB) = 1,024 megabytes (MB) 1 megabyte (MB) = 1,024 kilobytes (kB) 1 kilobyte (kB) = 1,024 bytes (B) Related articles Is Air SIM for Japan capable of roaming? Can I change my Air SIM pricing plan (subscription)? Are there any restrictions on the amount of data transferred (caps, throttling, etc.)? How do I return my Air SIM? Can I resize or replace my Air SIM?