said by NormanS:
Tomato? DD-WRT? I can't run them on my D-Link DIR-655!. All I get is how many packets are sent/received. In case you are not aware, not all routers have Tomato, or DD-WRT installed. Even those that are capable of flashing those firmwares; many don't bother. Which is why I asked for context. Until you brought up those custom router firmwares, there was no context to understand your statement.
In the very first post of the thread
I said that I was running dd-wrt. Don't know where your problem lies.
There is no universal multiplier that anyone can give you that will magically convert packets to number of bytes. Packets can be anywhere from 1 to 1492 bytes, and the average is who knows
because it varies explicitly based on your specific traffic
The upshot is that your equipment doesn't have the ability to measure what you want
it to measure. You either need to change the equipment, change the software that's running on it (if possible), or find some other way to measure your traffic. No-one said it'd be easy, and no-one owes you an easy solution except yourself.