Grand National free bet calculator

Our Grand National bet calculator is a useful tool to help you find out your returns from any Grand National bets you’re placing.

Types of Grand National bet calculator

The Grand National betting calculator can be used to work out the returns from different types of bets. you can use the calculator in conjunction with betting offers that are available across the big Aintree weekend. The most popular bets that can be settled using our Grand National calculator are the each-way bet Grand National wager and Grand National accumulator calculator.

Grand National each way bet calculator

Each way bets are one of the most common type of Grand National bets so the Grand National EW bet calculator is naturally a popular tool to have access to. Here’s an example of how to use the Grand National each way calculator:

  • Bet: £10 each way at 20/1 at one quarter the odds.

There are two elements for the use of the Grand National each way bet calculator. For example:

  • Win: £10 at 20/1 returns  £210 for a profit of £200.
  • Place: £10 at 5/1 returns £60 for a profit of £50.

The Grand National each way calculator returns £270 for a profit of £250 under this example. Find out more with our Each way betting guide here.

Grand National Each Way Bet Calculator

Each Way

Number of Selections

Odds Format

Add Selection Notes

#Outcome Odds Place OddsRule 4

Summary (Updated Automatically)

Stake Type

Total Outlay

Total Return

Total Profit

Bet £10 & Get £30 in Free Bets for new customers at bet365.
Min deposit requirement. Free Bets are paid as Bet Credits and are available for use upon settlement of bets to value of qualifying deposit. Min odds, bet and payment method exclusions apply. Returns exclude Bet Credits stake. Time limits and T&Cs apply. Registration required. Full T&Cs

Grand National bet accumulator calculator

The Grand National accumulator calculator is used to work out the returns from multiple bets. An accumulator combines four selections or more in one single line bet, and can be win or each way. The calculation can be complex so a bet accumulator calculator is a useful tool.

One line bets can be singles, doubles, trebles and accumulators. The odds are combined to work out the return. Each selection must win for a winning bet. The quickest way to calculate the returns is using a Grand National accumulator calculator.

Grand National Accumulator Calculator


Number Of Selections

Each way

Odds format

Total stake
Total return
Total profit
£20 In Free Bets Ker-Ching - When you bet £5 on horse racing
18+ New UK+IRE Customers only. Certain deposit methods & bet types excl. Min first £5 bet within 14 days of account reg at min odds 1/2 to get 4x £5 free bets. Free bets available to use on selected sportsbook markets only. Free bets valid for 7 days, stake not returned. Restrictions + T&Cs apply. Full T&Cs

How to use the bet calculators

Here is a step-by-guide to using the Grand National winnings calculator for each-way and accumulator bets:

  1.   Select the bet type, e.g. single, trixie, lucky 15, etc. Our betting guide can help you understand these terms.
  2.   Enter the unit stake.
  3.   Confirm the number of selections.
  4.   Choose Win or Each Way.
  5.   Enter the status for each selection: Won, Placed, Lost Non-Runner.
  6.   Enter the Win odds.
  7.   Enter the Place proportion: one half, quarter or fifth.
  8.   Click ‘Calculate Bet’.

The Grand National odds calculator works out the return from a bet. The Grand National winnings calculator saves times and ensures accuracy if the correct information is entered. Every major online bookmaker offers a Grand National calculator for new and existing customers.

How Are Bets Calculated?

The Grand National winnings calculator works out the returns from a bet, based on the stake and the odds. The Grand National odds calculator returns a loss if the bet is a losing one. The Grand National calculator can be used for the full range of bets: singles, doubles, trebles, accumulators and system bets. A Grand National calculator deals with win and each-way bets.

Here is an example of a Grand National odds calculator bet, based on the odds of one of the favourites from the 2024 Grand National:

£10 win on I Am Maximus to win the 2024 Grand National at 8/1:

£10 multiplied by 8 + 1 (stake) equals £90 and a profit of £80.

This Grand National odds calculator bet is straightforward but the same process applies when using the Grand National winnings calculator for more complex bets.

Advanced bet calculator functions

The Grand National calculator and other bet calculator odds tools have more advanced functions which are described below:

Free bet calculator

Bookmakers offer free bets, both as part of their welcome bonuses and occasionally in separate promotions to existing customers, so it’s useful having an online bet calculator all ready to go. Finding out how much you’ll win from a free bet is almost identical to betting with your own money, with the exception that you won’t receive the free bet stake as part of your winnings.

Accumulator calculator and system bet calculator

The calculation of the returns from singles is simple. However, the Grand National betting calculator comes into its own for working out the returns from accumulator and system bets. Both types of bets combine a number of combinations and the odds are multiplied.

An acca has only one line while system bets have permutations of singles, doubles, trebles and accumulators.  Both types of bet can be win or each-way. The Grand National odds calculator works out the return based on the stake, win odds and place terms. The bet calculator saves time and is accurate.

Betting odds calculator

Betting odds are calculated in several formats and the bet calculator can be used to convert the odds. The three most common odds formats are decimal, fractional and American. There is no single calculation to convert the odds but the calculator has a database of odds in each format. Here is how Evens is represented in each format:

Fractional: 1/1

Decimal: 2.00

American: 100

The implied probability is 50% which is used to work out the bets in each of the three odds formats.

Rule 4 Calculator

The advanced features of the calculator can deal with non-runners and Rule 4 Deductions. When a horse is withdrawn near the start of the race and bookmakers do not have time to create a new market, odds are adjusted to take into account the absent horse.

There is a sliding scale of % R4 Deductions based on the odds of the horse when it is withdrawn. The calculator works out returns based on the odds and stake and any Rule 4 Deductions.

Why use the bet calculator

The calculator and any other type of bet calculator are useful tools for working out the returns from winning bets. As long as the correct odds, stake and place terms are entered the tool will calculate the potential winnings from your bet quickly and accurately.

The toll comes into its own for complex system bets when there could be non-runners and Rule 4 Deductions. Each way bets are handled as long as the place terms are entered into the tool correctly.

Download our Grand National Betting Guide

Other useful pages

There’s no need for concern if some of the key terms and terminology are unfamiliar. Whether you’re wondering how to bet online, you’re interested in 2025 Grand National odds or you simply need a betting glossary to nail down one specific term, we’ve got all your needs catered for at

*All odds and values are hypothetical examples only.

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