Not really. In my case, one pulse = 10 litres. Then you can multiply (on the server) the litres by a factor to get the kWh. On the server again, you apply a function called "accumulator" which obviously accumulates the kWh.
There are a few basic functions you can use. If you already upload content on Thingspeak and I think you do [great rate display graph :-)], you can try emoncms. If you know PHP/Javascript, then you can develop your own applications and have them running on your Raspi.
daturach