BBC Election seat calculator

The BBC Election seat calculator is a rough way of converting percentage support for political parties into numbers of seats in parliament.

With the actual result of the May 2010 Election plotted on the BBC Election Calculator shows that the calculator does predict a hung parliament. It predicts 5% fewer (-15) Conservative seats, 3% more (+8) Labour seats and 11% (+7) fewer LibDem seats than was actually gained. See graphic below.