A simple to use Bet Calculator 8 in 1.
Trading calculator, calculat surebets (arbitrage bets calculator), change from back to lay odds and vice versa, change from EU (decimal odds) to UK (fractional) Odds and and vice versa, change from US / Amercia odds (Moneyline) to EU odds and vice versa, dutch calculator, check value, calculate fair odds and this all in one app!
It's all easy to use. For the trading calculator you only have to enter 2 odds and your stake for one bet, then you get the second stake and your profit. So you can make money on the go when trading on Betfair (touch.betfair.com is smartphone optimized).
With the Dutch calculator you can make check the outcome if you bet on more then one exit of the bet. I you want to check the value of one odd check out with the value checker or calculate the fair odd for your probability.