Betting Calculator: Free Odds and Bet Calculators in Naira

Everyday calculators

Returns, odds and the maths behind a single bet or an acca.

7 tools

Bet CalculatorSingles, doubles, accas and every full-cover bet from Trixie to Goliath, with won, lost and void legs.All bet types Accumulator CalculatorTotal odds, return and profit of a multiple, plus the acca bonus and the chance that every leg lands.Up to 20 legs Odds ConverterDecimal, fractional and American odds, and the implied probability, converted as you type.4 formats Fractional Odds CalculatorWhat a price like 5/2, 10/1 or 50/1 pays on your naira stake, in decimal terms too.5/2, 50/1 Margin CalculatorHow much the bookmaker keeps on a market, and the fair odds once the margin is taken out.Overround Expected Value CalculatorThe average profit or loss of a bet from the odds and your own estimate of the chance.EV Asian Handicap CalculatorHow whole, half and quarter handicap lines settle on the final score: win, half win, push or loss.Quarter lines

Bonuses, trading and staking

Free bets, rollover, laying, hedging, cash out and how much to stake.

9 tools

Free Bet CalculatorThe return of a free bet when the stake is or is not given back, and its average value at the odds.SNR and SR Rollover CalculatorHow much you must stake to clear a bonus, how many bets that takes and what it costs on average.Wagering Matched Betting CalculatorLay stake, liability and the result either way for qualifying bets and free bets.Back and lay Lay Bet CalculatorYour liability and profit when you bet against a selection on a betting exchange.Liability Hedge Bet CalculatorThe stake on the other side that locks the same profit whatever happens.Lock profit Cash Out CalculatorThe fair value of your open bet at today's odds, next to what the bookmaker is offering.Fair value Arbitrage CalculatorStakes for a surebet across bookmakers on 2-way and 3-way markets, and the profit it locks.Surebets Dutching CalculatorSplit one stake across several picks so that any winner pays the same amount.Up to 6 picks Kelly CalculatorHow much of your bankroll the Kelly criterion says to stake when you have an edge.Staking

System and full-cover bets

Every combination of your picks, from a Trixie to a Goliath.

11 tools

System Bet CalculatorPick 3 to 10 selections and any combination sizes: 2/3, 3/5, 4/6 and mixed systems.Any X/N Trixie CalculatorThree doubles and a treble on 3 selections. Two winners are enough for a return.3 picks · 4 bets Patent CalculatorA Trixie plus three singles: one winner already returns something.3 picks · 7 bets Yankee CalculatorSix doubles, four trebles and a fourfold on 4 selections.4 picks · 11 bets Lucky 15 CalculatorA Yankee with four singles added, so a single winner pays.4 picks · 15 bets Super Yankee CalculatorEvery double, treble, fourfold and the fivefold on 5 selections. Also called a Canadian.5 picks · 26 bets Lucky 31 CalculatorA Super Yankee plus five singles on 5 selections.5 picks · 31 bets Heinz Calculator57 bets from doubles to the sixfold on 6 selections.6 picks · 57 bets Lucky 63 CalculatorA Heinz plus six singles: every possible bet on 6 selections.6 picks · 63 bets Super Heinz Calculator120 bets from doubles to the sevenfold on 7 selections.7 picks · 120 bets Goliath Calculator247 bets from doubles to the eightfold on 8 selections.8 picks · 247 bets

What a betting calculator does

A betting calculator turns a slip into numbers you can check: the total stake, the return if it wins, the profit and, just as important, the chance the odds imply. Bookmakers show the potential win, but not how a Yankee splits into 11 bets, how a void leg changes an acca or what a ₦5,000 free bet is really worth. Our betting calculators do, in naira, before you place anything.

Pick a calculatorChoose the tool named after your bet or your question.
Type stake and oddsDecimal odds as your bookmaker shows them. Fractions work too.
Set the resultsWon, lost or void for each leg, to settle a slip as it stands.
Read the numbersReturn, profit and the chance the odds imply, updated as you type.

Which betting calculator do you need?

You are about to	Use
Place a single, double or acca	Bet calculator or accumulator calculator
Place a system bet such as 2/3 or 3/5	System bet calculator
Place a Yankee, Lucky 15 or Heinz	The calculator with that name, under System bets above
Read a price like 5/2 or +150	Odds converter
Accept a welcome bonus	Rollover calculator and free bet calculator
Decide on a cash out	Cash out calculator and hedge bet calculator
Choose a stake	Kelly calculator and our bankroll guide

Decimal odds in 30 seconds

Decimal odds are the return on each naira staked, stake included. At 1.85, ₦1,000 returns ₦1,850. In an acca the odds multiply: 1.85 × 2.10 × 1.60 = 6.22, so ₦1,000 returns ₦6,216. The implied chance is 1 divided by the odds: 6.22 implies about 16%, and less once the bookmaker's margin is counted.

Decimal odds	Return on ₦1,000	Implied chance
1.50	₦1,500	66.7%
2.00	₦2,000	50.0%
3.50	₦3,500	28.6%
10.00	₦10,000	10.0%

Guides behind the calculators

How to use the calculatorsHow to use our betting calculators Betting odds explainedHow decimal, fractional and American odds work, how to turn any price into a return in naira and what the implied probability behind the odds tells you Bookmaker marginWhat the bookmaker margin is, how to measure it from the odds of a market, why it grows in accumulators and how to compare prices between bookmakers Accumulator betsHow accumulator odds multiply, why each extra leg cuts your chance, how acca bonuses and void legs are settled, and how to check a slip before you place it System betsSystem and full-cover bets in one guide Free bets and rolloverHow free bets pay out, why the stake is usually kept, what a rollover requirement costs and how to judge a welcome bonus before you accept it Matched bettingHow backing and laying cancel each other out, what liability and commission mean, how a free bet is turned into cash and the limits of the method Hedging and cash outHow to hedge a running bet or acca, how a cash out offer compares with its fair value and when locking in a smaller sure profit is worth it Arbitrage and dutchingHow surebets and dutching split one stake across several outcomes, how to spot an arbitrage from the odds and the practical risks before you try it Value betting and KellyWhat expected value means for a bet, how to estimate an edge honestly and how the Kelly criterion turns that edge into a stake size you can live with Asian handicapHow Asian handicap lines settle Bankroll managementHow to set a betting bankroll, size each stake as a unit, survive losing runs and keep records, with naira examples and the limits that protect you

Built to settle bets the way bookmakers do

Each calculator follows the usual settlement rules: void legs count at 1.00, quarter handicap lines split the stake, free bets keep or drop the stake depending on their type. Every formula is published on our how we calculate page, and every example on the site is worked by hand and checked against the betting calculator. The calculators run in your browser: we never see your stakes or odds.

A betting calculator shows what a bet pays. It cannot tell you whether it will win. Betting is for adults of 18 and over; set a budget and keep to it.

Betting calculator FAQ

Is the betting calculator free?

Yes. All 27 calculators are free, with no account and no limit on use.

Does the bet calculator work with naira?

Yes. Every example and result is in naira. The odds work the same in any currency, so you can use any amount.

Can I enter fractional or American odds?

Yes. In the bet calculators, type 5/2 or +150 and it is converted to decimal odds for you.

Which calculator handles a Yankee or a Lucky 15?

Each full-cover bet has its own calculator, and the bet calculator covers all of them in one place.

How do you treat a void selection?

As odds of 1.00, the most common rule. Your bookmaker's own terms decide in the end.

Do you recommend bookmakers?

No. We only build calculators and guides; no bookmaker pays us.