Free Betting & Casino Calculators

Work out returns before you bet, compare odds formats and see what a bonus really asks of you. All of our tools are free and run in your browser.

Bet calculator Free bet calculator for singles, doubles, trebles, accumulators, Yankees, Lucky 15s and more. Supports each way, non-runners and Rule 4 ded…
Each-way calculator Free each-way bet calculator. Enter your stake, odds and place terms to see win and place returns, including Rule 4 deductions and non-runn…
Odds converter Convert betting odds between fractional, decimal and American formats and see the implied probability. Includes a common odds conversion ta…
Acca calculator Work out accumulator returns for 2 to 12 selections, including acca boost percentages on winnings and void legs. Free and quick to use.
Lucky 15 calculator Free Lucky 15 calculator. Enter four selections to see returns on all 15 bets (singles, doubles, trebles and the four-fold), win or each wa…
Free bet calculator See what a free bet returns at any odds. Shows the difference between stake-not-returned and stake-returned free bets, with worked examples.
Wagering calculator Work out how much you need to bet to clear a casino bonus, including game contribution, plus the average cost of that play based on RTP.
Cost of play calculator See how much you stake in a slots or casino session and its average cost based on RTP. A simple safer gambling tool for setting a budget.

Which tool do you need?

Placing a bet on several selections? The bet calculator settles singles, doubles, trebles, accas and full-cover bets from a Trixie up to a Goliath, win or each way.
Backing a horse each way? The each-way calculator splits your return into the win and place parts, including Rule 4 deductions.
Seen odds in a format you don't know? The odds converter switches between fractional, decimal and American odds and shows the implied chance.
Got a free bet? The free bet calculator shows what it pays when the stake isn't returned.
Claiming a casino bonus? The wagering calculator shows how much you'd need to bet before you can withdraw, and the cost of play calculator shows what a session costs on average.

Every result is an estimate. Operators settle bets using their own rules, so check your bet slip and the offer terms.

Frequently asked questions

Are these calculators free?

Yes. All of our calculators are free, need no sign-up and work on mobile. Calculations happen in your browser, and we don't store what you enter.

Are the results guaranteed to match my bookmaker?

They follow standard UK settlement rules, but bookmakers can apply their own terms, such as bonuses, maximum payouts or dead heat rules. Your bet slip is always the final word.