I have created a Prius fuel consumption and cost recording Excel spreadsheet. At present it is designed to record in dollars ($), litres and kilometers with an output in L/100km and for comparison, US MPG. I am looking at expanding the spreadsheet to cover other numbering systems. I know that Europe uses Euros and litres but how do you measure fuel consumption? Is it L/100km or km/L? Am I correct in assuming that Britain uses a hybrid system - L/mile, or is it gallons/km? To save me time, what is the conversion rate to L and km? I know the US uses US gallons and miles so I do not need info on that system. Are there any other systems that I have not mentioned? If it is easy to expand my spreadsheet to encompass the lot I will by giving a selectable choice. If not, I will consider separate spreadsheets. The spreadsheet is well documented and made easy to use.