Hedging a Bet, Explained

After reading this you can calculate the exact stake to place on the opposite side of an open bet so both outcomes pay the same, and you can turn a free bet into guaranteed cash.

What hedging is

Hedging means placing a second bet against your first one. You already backed a selection at some odds. Then the market moves, or you just want certainty, so you bet on the other outcome to protect yourself. Done correctly, both results leave you with the same profit no matter what happens.

Here is the hook. You backed a team at decimal odds 3.00 with a 100 stake. If they win you collect 300, a 200 profit. The other side is now available at 1.60. Bet 187.50 on that side and you walk away with about 12.50 profit whichever result lands. You gave up upside for certainty. That trade is the whole idea.

When to hedge and when to skip it

Hedging is useful in three situations. First, your original odds have shortened, so laying the other side is cheap and you can lock a profit. Second, you want to remove variance before a big single result, for example the last leg of a parlay. Third, you hold a free bet and want to convert it into withdrawable money.

Hedging is a poor choice when the other side is expensive relative to your original odds. In that case locking in guarantees a loss on both outcomes. It also erases positive expected value. If your original bet had an edge, hedging trades that edge for safety, and over many bets that safety costs you money.

Hedging is the reverse of an arbitrage. In an arbitrage you place both bets at the same time to guarantee profit. In a hedge you already hold one bet and add the second later, so the profit depends on how much the odds moved in your favor.

The lock formula

You want the hedge stake that makes your return equal on both outcomes. Let the original stake be S, the original decimal odds be o_b, and the hedge decimal odds be o_h. The hedge stake H is:

H = \frac{S \cdot o_b}{o_h}

The numerator S \cdot o_b is the full return of your original bet if it wins. You divide by the hedge odds because a stake at odds o_h returns H \cdot o_h, and you want that return to match the original one. Setting H \cdot o_h = S \cdot o_b and solving gives the formula above.

Once you have H, the locked profit is the same on both sides. Your total outlay is S + H, and either outcome returns S \cdot o_b, so:

\text{Profit} = S \cdot o_b - (S + H)

If that profit is positive you have locked a guaranteed gain. If it is negative the hedge odds are too short and you would lock a guaranteed loss instead.

Worked example with the demo data

Locking equal profit at 3.00 and 1.60

Use the demo values: mode lock, stake 100, original odds 3.00, hedge odds 1.60.

Original return if your side wins: 100 × 3.00 = 300.
Hedge stake: H = 300 / 1.60 = 187.50.
Total staked across both bets: 100 + 187.50 = 287.50.
If your original side wins, you collect 300 and lose the hedge stake. Profit: 300 − 287.50 = 12.50.
If the hedge side wins, it returns 187.50 × 1.60 = 300, and you lose the original stake. Profit: 300 − 287.50 = 12.50.

Both outcomes return 12.50. That is the lock. The return on your total 287.50 outlay is about 4.35%.

How the hedge odds change the lock

The single number that decides whether hedging pays is the hedge odds compared to your original odds. Break even happens when the two bets exactly cancel. Solving S \cdot o_b = S + H with the stake formula shows you break even when:

o_h = \frac{o_b}{o_b - 1}

For original odds of 3.00, break even is at 3.00 / 2.00 = 1.50. Any hedge odds above 1.50 lock a profit. Any below 1.50 lock a loss. The demo hedge odds of 1.60 sit just above the line, which is why the profit is a modest 12.50.

Profit rises as the hedge odds lengthen. The vertical marker at 1.50 is the break-even point; everything to its right locks a gain.

The chart shows the profit climbing steeply once you pass 1.50. At hedge odds equal to your original 3.00, the profit reaches 100, which happens only if the market has not moved at all and you could have arbitraged from the start.

Converting a free bet

A free bet usually returns winnings only, not the stake itself (a "stake not returned" bet). So a free bet of 100 at odds 3.00 pays 200 if it wins, not 300. To convert it to cash, hedge with your own money on the other side. The hedge stake is:

H = \frac{S \cdot (o_b - 1)}{o_h}

The term S \cdot (o_b - 1) is the free bet's winnings, since the stake is not yours to keep. With S = 100, o_b = 3.00, o_h = 1.60: the winnings are 100 × 2.00 = 200, so H = 200 / 1.60 = 125.

Now check both outcomes. If the free bet wins, you collect 200 and lose the 125 real hedge stake, netting 75. If the hedge wins, it returns 125 × 1.60 = 200, and the free bet cost you nothing, so you net 200 − 125 = 75. Either way you keep 75 in real money. That is a conversion rate of 75% on a 100 free bet, which is typical for these odds.

Free bet conversion improves with longer original odds and shorter hedge odds. Backing at 5.00 and hedging near 1.25 can push the retained value above 80%. The best free bets to convert are on markets where the two sides are priced close together.

Reading and interpreting the result

The calculator returns the hedge stake and the guaranteed profit. Read them together with your total outlay. A profit of 12.50 on 287.50 staked is a return of about 4.35%, but only 100 of that outlay was ever truly at risk since the original bet was already placed. Judged against your 100 original stake alone, locking 12.50 is a 12.5% return with zero remaining variance.

For free bet mode, the number that matters is retained value as a share of the free bet face value. The 75 retained on a 100 free bet is your real, measurable gain.

Common mistakes

The first mistake is hedging when the numbers guarantee a loss. If your hedge odds sit below o_b / (o_b - 1), you are paying to remove variance. Sometimes that is worth it psychologically, but know that the expected cost is real.

The second mistake is using the lock formula on a free bet. Because a free bet does not return its stake, using H = S \cdot o_b / o_h over-hedges. In the example that would stake 187.50 instead of the correct 125, and you would lose money if the free bet won.

The third mistake is ignoring commission on betting exchanges. If your hedge is a lay bet at a 2% or 5% commission, the effective odds are lower than shown and your locked profit shrinks. Reduce the hedge odds by the commission before you calculate.

Rounding your hedge stake to a whole number breaks the perfect lock. On a 187.50 hedge, rounding to 188 shifts your two outcomes apart by a small amount. It rarely matters, but with large stakes place the exact figure where the platform allows it.

Related tools

If your odds are quoted in American or fractional form, convert them first with the Odds Converter. To decide whether hedging is even worth giving up your edge, check the Expected Value Calculator. When your open bet is the final leg of an accumulator, the Parlay Calculator gives the pre-hedge return. For placing both sides fresh rather than hedging an open bet, use the Arbitrage Calculator, and to spread one stake over several runners see the Dutching Calculator. To see how much margin the hedge market carries, run it through the Vig Remover. For place-market bets, the Each-Way Bet Calculator handles the split.

Frequently asked questions

How do I calculate a hedge bet?

Multiply your original stake by your original decimal odds, then divide by the hedge odds. For a 100 stake at 3.00 hedged at 1.60, that is 100 × 3.00 / 1.60 = 187.50. Both outcomes then return the same amount.

Does hedging always guarantee profit?

No. It guarantees the same result on both outcomes, but that result is only a profit if the hedge odds exceed your break-even point of o_b / (o_b - 1). At original odds of 3.00, you need hedge odds above 1.50.

Why is the free bet hedge stake smaller?

A free bet returns winnings only, not the stake. So it pays S × (o_b - 1), not S × o_b. You hedge against the smaller amount, giving a smaller stake and a guaranteed cash profit instead of an equal return.

Should I hedge my last parlay leg?

Only if you value certainty more than the parlay's expected value. Hedging the final leg locks a guaranteed sum but removes the large payout you were chasing. Run the numbers both ways before deciding.

How does exchange commission affect the result?

Commission on a winning lay reduces your effective odds. At 5% commission, treat hedge odds of 1.60 as closer to 1.57, which lowers your locked profit. Apply the reduction before calculating the stake.

Try it yourself in the tool