When you log a journey and tell us how you would otherwise have made that journey (if you hadn’t been taking part in the challenge), we compare the two modes of transport to find the difference in cost for each journey. This number gives you your total savings so far during the challenge. The smaller number at the bottom of the box indicates how much money you have saved when compared with someone travelling by car – if all of your logged journeys would have otherwise been by car, these figures will be the same.
Calculations are based on AA data about the cost of running a car, and use approximate figures based on the average car.