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Betting calculator

Parlay odds calculator

Last updated: Written by Ellie Marsden, Senior Betting Editor Fact checked by Tom Brackley, Odds Analyst

Example result 10.00 at 1.80, 2.00 and 2.50 gives 9.00 combined odds and 90.00 payout.

What this calculator answers

Multiply up to ten active decimal prices to find a combined price and return from a single total stake. Leave unused legs blank.

Formula and worked example

Formula: Combined decimal odds = product of every active leg price. Payout = total stake multiplied by combined decimal odds.

A 10.00 stake on 1.80, 2.00 and 2.50 gives combined odds of 9.00 and a payout of 90.00. The profit is 80.00 after subtracting the stake.

Checks before using the result

  • Adding prices rather than multiplying them.
  • Entering an American price in a decimal field.
  • Leaving a non runner at its original price.

When the calculation does not apply

It applies to a simple all-win combined bet. A void leg, cash out, revised price or special settlement term can change the final calculation.

Keep the number in context

A calculator shows the arithmetic. It doesn't tell you whether the price fits your read of the outcome or your budget. Decide the stake before you enter it. Check the market rules. Keep essential money out of it entirely.

Cross-check on a second tool. The calculator hub, Margin of victory or Bet return cover the same numbers from a different angle. Same price conventions, so a decimal price in one is a decimal price in the other.

Read the guide to reading odds if you're new to the formats. Two minutes.

Reading a rounded result

Money is rounded to two decimals here. A real settlement applies its own rounding sequence, which can differ. Keep the original inputs written down if you're going to check the number later.

Unclear about an input? Find the stated market term. Don't guess. A quick sanity check: change one input by a small amount and see whether the result moves the way you expect.

That doesn't validate the market. It can flag a reversed sign, a mis-entered price format or a duplicated stake. Use the number to understand the arithmetic. It's not a reason to ignore a limit you set in advance.