Having 0-1000 fit inside a byte would be great. 1 byte for tonnes, 1 for kg, 1 for g, 1 for mg. Same with meters, liters, etc. Would work great with metric.

Or addressing 1 TB of memory with 4 bytes, and each byte is the next unit: 1st byte is GB, 2nd byte is MB, 3rd byte is KB, 4th byte is just bytes.