Arb Calculator

The Arb Calculator is an essential tool for anyone backing and laying on Betfair. It allows you to ‘Green Up’ your bets in seconds. Just enter a few figures and the Arbing Calculator does all the hard work.

Quick Guide To Using The Calculator

1. First enter the commission you pay on Betfair in the ‘Commission Rate’ box (it’s normally 5%).
2. If you’ve already backed a horse or football match then you should to use the first part of the calculator ~ this works out how much you need to lay the bet for. We’ll be using the first part of the calculator because you should always “Back High ~ Lay Low”
3. Most people back a horse or football team first and then want to lay them at lower odds, this guarantees a profit whatever the outcome.
4. So if you’ve backed the Arsenal match to be under 2.5 goals at 1.92 then enter 1.92 in the ‘Enter the Odds You’ve Backed at:’ box
5. Then enter the amount you’ve bet (your stake) in the ‘Enter your Back Stake’ box (example: 5.50) Don’t use £ or $ symbols just numbers (and decimal points if need).
6. Then enter the odds that you want to lay at, for example: 1.63, do this in the ‘Enter the Odds you want to lay at’ box
7. Now click the ‘Calculate Lay Stake’ button, this will tell you the cash amount you need to lay to guarantee a profit. If you’ve followed the example above the calculator will tell you that you need to Lay £6.47 at odds 1.63 to guarantee a profit of £0.92 (Green Up) whatever happens! (Assumes 5% commission entered)
8. If you’ve placed a lay bet first then use the second part of the calculator ~ this tells you how much you need to back for. It’s works in exactly the same way.

Liability Calculator

Reduce you exposure with our Liability Calculator, occasionally you may not want to green up your bets perfectly. For example, if you’re 80% sure that horse is gonna romp home you might only want to reduce your exposure on a bet by a small percentage. If that’s the case you use the Liability Calculator slider to see how much you should Stake to, at least, cover your Liabilty, while risking an appropriate percentage of your potential profit.

Here’s how the calculator works…

1. Enter your Stake (Example 5.00 don’t use $ or £ symbols), then enter the back odds and the lay odds.
2. Choose whether you have already Backed and now wish to Lay or already Layed and now wish to Back.
3. Click on and move the grey slider pointer along the line where you see 20%, 30%, 40% etc.
4. The output shows the amount you need to stake to either cover your Liability, or your Liability and all of your potential profits.

Other Calculators

Ours isn’t the only calculator on the internet, on this page we take a look at some of the other great online calculators and provide links to them.

Bet Calculators & Tools

Free-Bet-Calculator.co.uk has a terrific calculator for working out those big accumulators like Super Yankees, Goliath’s and Lucky 15’s.

Chromaweb has loads of great tools and calculators for working with the Betfair exchange.

BetCalc have a good selection of calculators, especially useful is the new Dutching Calc.

None Betting Calculators

Percentage Calculator is brilliant and very easy to use.

Currency Converter xe.com is one of the best currency converters around.