How can you tell if an audiobook will fit on a 1 GB iPod Shuffle before you purchase it?

# Find the TRT, or Total Run Time, of the audio book in seconds.

Duration of Audiobook in seconds: _____

# Find the bitrate (in kilobits per second, or kbps) of the audiobook. Many are 32kbps. Some are as high as 128kbps. Jump to the bottom for a quick summary of how much your iPod can hold, or if you're not interested in doing any math.

Bitrate of Audiobook recording: _____

# Multiply the number of seconds by the bitrate to find the total size of the audiobook in kilobits.

Size of Audiobook in kilobits (#1 multiplied by #2): _____

# Divide the size of the audiobook in kilobits by 8,000,000 to find its size in player GB. If the answer is less than 1, you win!

Size of Audiobook in GB (#3 multiplied by 8,000,000): _____

At 32kbps, a 1 GB player can hold roughly:

250,000 seconds = about 69 hours

At 128kbps, a 1GB player can hold roughly a quarter of the above:

62,500 seconds = about 17 hours and 20 minutes

Note: GB for mp3 players like the iPod are usually marketed as measuring GBs differently than your computer does:

1 GB = 1,000,000,000 bytes, iPod.

1 GB = 1,073,741,824 bytes, Computer.