Dutching Calculator
Dutching allows you to back multiple horses in the same race and guarantee the same profit whichever one wins. Rather than putting all your eggs in one basket, you spread your total stake across several runners in proportion to their odds. This calculator works out exactly how much to place on each horse so that every winning outcome returns the same amount.
Enter your total stake below, add your runners with their fractional odds, and the calculator will do the rest. It will also tell you whether the book is in your favour, meaning the combined implied probabilities add up to less than 100%.
Enter Your Dutch Bet
Enter fractional odds (e.g. 5/1, 9/4, evens). Horse name is optional.
Your Returns
Enter your total stake and at least two runners with their odds, then hit Calculate to see the optimal stake for each horse and your guaranteed return.
The Complete Guide to Dutching in Horse Racing
Dutching is one of the oldest and most respected betting strategies in horse racing. Named, according to popular legend, after the infamous gangster Dutch Schultz who used a similar approach to guarantee profits from illegal betting operations in 1920s New York, the technique has long since been adopted by shrewd punters the world over. The principle is beautifully simple: rather than backing a single horse and hoping for the best, you back two or more runners in the same race, dividing your total stake so that whichever of your selections wins, you receive the same return.
How Does Dutching Work?
The mathematics behind dutching is straightforward once you understand the concept. Every set of odds carries an implied probability. A horse at 4/1 has an implied probability of 20% (that is, 1 divided by the decimal odds of 5.0). A horse at 2/1 has an implied probability of 33.3%. When you dutch a group of horses, you add up their individual implied probabilities. If the total comes to less than 100%, you have found value and there is a guaranteed profit to be had regardless of which horse in your selection wins.
The formula for calculating each individual stake is:
Individual Stake = Total Stake x (1 / Decimal Odds) / Sum of (1 / Decimal Odds for all runners)
So if you are dutching three horses at 3/1, 5/1 and 8/1 with a total stake of £100, the calculator works out how much goes on each horse so that all three winning scenarios produce the same return.
When Does Dutching Make Sense?
Dutching is particularly useful in several common racing scenarios:
- Competitive handicaps. When you have narrowed the field down to three or four contenders but cannot separate them, dutching lets you back the lot and still make a profit if any of them obliges.
- Price discrepancies across bookmakers. If one firm has Horse A at a bigger price than it should be and another has Horse B at over the odds, you can dutch both at inflated prices and lock in a mathematical advantage.
- Eliminating horses rather than picking winners. Sometimes it is easier to identify which horses cannot win than which one will. If you can confidently rule out half the field, dutching the remainder can be highly effective.
- Large fields at festivals. In big-field handicaps at Cheltenham, Aintree or Royal Ascot, dutching three or four fancied runners is a popular and sensible approach.
The Importance of the Overround
The key number to watch when dutching is the combined implied probability of your selections. If it totals less than 100%, you are getting value. If it totals more than 100%, the bookmaker's margin is working against you and you will lose money on the dutch regardless of the outcome. This is why dutching works best when you can find generous prices, whether through best-odds shopping, exchange markets, or early prices before the market tightens.
A typical bookmaker's overround on a horse race might be 115% to 125% across the entire field. But because you are only dutching a subset of runners, what matters is the combined implied probability of just those selections. If you are dutching three runners whose implied probabilities total 85%, you have a 15% edge, which is outstanding.
Dutching vs Laying on the Exchange
Some punters achieve a similar effect by laying horses on a betting exchange rather than dutching at the bookmakers. The two approaches are related but distinct. Laying on the exchange means betting against specific horses, whereas dutching means backing multiple horses at the bookmaker. Exchange laying can sometimes offer better value, but it requires a different mental model and carries the risk of larger liabilities. Dutching at the bookmaker is simpler: you know exactly what your total outlay is before the race starts, and your downside is limited to your total stake.
Practical Tips for Dutching
Always check the odds across multiple bookmakers before placing your dutch. The whole point is to maximise the price on each selection, and even a marginal improvement on one horse's odds can turn a break-even dutch into a profitable one. Use a calculator like this one rather than trying to work out stakes manually, as rounding errors can eat into thin margins. And remember that dutching works best as a disciplined, systematic approach rather than a one-off gamble. The edge comes from consistently finding situations where the combined implied probability of your selections is below 100%.