# Free Online Bet Calculator

It’s great to have a helping hand when you want to work out your bets. Our Free Online Bet Calculator does just that. It shows you how much you could win from a wide variety of bets – and will save you time when planning your wagers.

## Bet Calculator

### Odds Format

$25.00

Estimated Profit

Converted Odds and Implied Probability

-400

American

1/4

Fractional

1.25

Decimal

80.0%

Implied Probability

Total Outlay

$100.00

Total Profit

$25.00

Total Return

$125.00

Remember, if your bet wins, your original stake is returned too. So add that value to the profit. That applies to your total payout figure for fractional and American odds. Decimal odds include your stake in your expected profit.

## Calculate Your Odds

A bet calculator is an incredibly useful tool. Odds can be quite complicated – especially when you bet on parlays – so being able to work out your potential returns quickly and easily saves you a lot of time.

Using a free bet calculator enables you to see how your selections, and the odds for them, impact your returns and profit. Even the most experienced bettors still use bet calculators to help them work out the returns on particular bets.

The calculator is flexible and customizable. You can enter your own stake and the odds for a single bet or a range of multiple bets.

You will also find below an overview of the most popular bet types and markets to add to your knowledge when you are weighing up a wager.

If you need more detail, our Betting Glossary has definitions of all the major types of bet available to you.

## Betting Terms to Know by Heart

The simplest bet of all. A single stake on a single selection. All you need to do is work out who you think will win a particular event or correctly predict a specific outcome, decide on your stake, and bet on your selection. Our odds calculator will show how much you should expect to receive if you win.

To bet the moneyline means to select a winner. We work out which team or player in a match or event is going to triumph, and make our wager accordingly. Normally a two-way market, certain sports such as soccer also provide a third option – the tie – making it a three-way market.

Also known as a totals bet, we’re looking to work out how many times a particular event will happen, rather than pick a winner. The sportsbook will set a number, such as the combined number of points in an NBA game, and if we think it will be more than that total, we go over; if fewer, under.

Similar to a handicap, this is one of the most popular forms of betting. The sportsbook “equalizes” the competitors by giving the underdog a virtual advantage. The odds for both sides will then be about the same; we have to decide if the favorite will win by more than that advantage or not.

Also known as an accumulator, or a multiple, this is a way of backing several selections with a single stake. All the odds are multiplied for a bigger price, but most importantly, all selections have to win for you to see a return. Even seasoned bettors find it handy to use a parlay calculator to find out what they might win - check out ours above.

If we believe we know exactly what the final score will be in a single match, we will be able to find odds to back that selection. This is usually employed for low-scoring sports such as soccer and hockey, less so for high-scoring sports like basketball and football.

An each-way bet allows us to bet twice on a selection, to win and to place (finish second or third, for example) – hence the term “each-way”. This may be an option if our choice is an outsider, or is taking part in an event with a large number of entrants.

## Sports Betting Odds: American, Decimal & Fractional

Betting odds are not the same all over the world. Depending on where you are, you will be presented with one of three different formats. It’s always worth reminding yourself that the probability they are expressing is the same – and that you can convert from one to another quite easily. You can compare all three formats using our free online odds calculator.

### American

Also known as moneyline odds or US odds, it is always displayed using a bet total of $100.

The odds for the favorite, which will have a minus sign (-) in front of them, show the amount you need to bet to win $100.

The odds for the underdog, which will carry a plus sign (+), show how much you will win if you bet $100 on your choice.

If the Kansas City Chiefs are the favorites to win, their odds might be -175, and you’ll have to bet $175 to win $100 – a total return of $275.

Their opponents, the Tampa Bay Buccaneers, may be priced at +145, and you’ll have to bet $100 to win $145 – a total return of $245.

### Decimal

Decimal odds are used in many parts of the world, including Europe, Australia and New Zealand.

The main thing to remember when you see decimal odds is that they include the stake that will be returned to you. This is not the case with American or fractional odds.

If you look at the market for a major European horse race and the favorite is priced at 3.50, that means if you stake $100 you will win $350.

Decimal odds may look unfamiliar to you at first but it doesn’t take long to be comfortable with them.

### Fractional

Fractional odds are distinctly old-school and are used in the United Kingdom and Ireland.

The best way to understand them is to add the numbers either side of the dash together. Once you’ve done that, the number on the right of the slash is how often out of that total a certain event should happen.

If a competitor is 1/5, that means out of every six times the event occurs they should win five times – so they are a heavy favorite. Taken literally, this means, for every $5 you bet, you’ll get $1 in return.

If they are 10/1, they should win once every 11 times – so there is less chance it will happen. Which means, for every $1 you bet, you’ll get $10 in return.

To calculate your winnings, divide your stake by the number on the right and multiply the result by the number on the left.

## Odds Conversion Table

You can convert your odds between American, decimal and fractional quickly and easily by using the table below. As you will see, the likelihood of the event you are backing to happen is the same. The “implied probability” is a mathematical expression of the percentage chance of the selection you are choosing being successful.

Fractional | Decimal | American | Implied Probability |
---|---|---|---|

1/5 | 1.2 | -500 | 83.3% |

2/9 | 1.22 | -450 | 81.8% |

1/4 | 1.25 | -400 | 80% |

2/7 | 1.29 | -350 | 77.8% |

1/3 | 1.33 | -300 | 75% |

4/11 | 1.36 | -275 | 73.3% |

4/9 | 1.44 | -225 | 69.2% |

1/2 | 1.5 | -200 | 66.7% |

1/1 | 2 | 100 | 50% |

5/4 | 2.25 | 125 | 44.4% |

9/1 | 10 | 900 | 10% |

10/1 | 11 | 1000 | 9.1% |

20/1 | 21 | 2000 | 4.8% |

50/1 | 51 | 5000 | 2% |

100/1 | 101 | 10000 | 1% |

1000/1 | 1001 | 100000 | 0.1% |

## How Can You Convert Odds Manually?

As you can see, it’s easy to switch between odds formats when you have a conversion table in front of you. However, what if you want to move across formats manually? We have a guide for each of the combinations you might see.

For positive American odds, you divide them by 100. So American odds of 300, divided by 100 = 300/100, or 3/1.

For negative American odds, you start with -100 and divide that by the American odds, so for example -100/-300 = 1/3.

For positive odds, add one to the American odds divided by 100. So for American odds of +300, it’s 1 + (300/100) = 4.0.

For negative odds, it’s a bit more tricky. It’s 1 minus (100 divided by the US odds). So for American odds of -300 it’s 1 - (100/-300) = 1.333.

For positive odds, it’s the decimal minus 1 and then multiplied. So 3.00 = (3 - 1) x 100 = +200.

For negative odds, take 100 and divided it by the decimal odds minus one. So 1.2 = -100 / (1.2 – 1) = -500.

This is one of the easier conversions. Just subtract one from the decimal value. So 3.00 = 3 - 1 = 2, which is written as 2/1 and is known as “two to one”.

For positive odds (i.e. longer than evens or 1/1), multiply the fractional value by 100. So 3/1 = 3 x 100 = +300.

For negative odds (i.e. shorter than evens or 1/1) it’s -100 divided by the fractional odds, so 1/5 = -100 / (1/5) = -500.

This one is also a little easier. Add one to the fraction, so 3/1 is: (3/1) + 1 = 4.00.

For more complicated fractions, such as 11/4, this has to be divided “to one” first. So divide 11 by 4 and you’ll get two-and-three-quarters to one or 2.75/1, which is 2.75. Add the one and you get 3.75.

11 / 4 = 2.75 + 1 = 3.75.

## Odds Calculator FAQs

Odds are simply an expression of the mathematical probability of a particular event happening. These are calculated by oddsmakers or traders who are experts in each event. You can use our odds calculator to work out what your winnings will be if you bet at those odds.

Odds can be expressed in three different ways. American odds are used in the US and Canada, while decimal odds are used in Europe and Australasia. You’ll find fractional odds in the United Kingdom and Ireland. But our betting odds calculator will allow you to use all three.

Odds apply to all sports in the same way. Many sportsbooks allow you to see the odds in whichever format you are most comfortable with. You can use our betting calculator to work out your projected winnings on any sport you choose to bet on.

It’s really easy. Simply input your stake and the type of bet, and the bets calculator will do the rest. You can use it as a parlay calculator to do more complicated combination bets and find your projected winnings. If you make an each-way wager, you can use it as an each-way bet calculator.