{"success":true,"version":"v1","request":{"tool":"list_calculators","category":"gaming"},"result":{"entity_type":"calculator_list","status":"completed","count":8,"calculators":[{"calculator_id":"odds-converter","entity_type":"calculator","name":"Odds Converter","category":"gaming","tool_name":"convert_betting_odds","description":"Converts betting odds between American (moneyline), decimal (European) and fractional (UK) formats, auto-detecting the input format, and reports the implied probability, profit and total return for a stake.","use_when":"You have odds in one format and need the other two, the implied probability of a price, or the payout of a stake at those odds.","do_not_use_when":"You need the combined price of several selections (use parlay-odds), the value of a bet given your own probability estimate (use bet-expected-value), or a bookmaker's margin across a whole market (use arbitrage-bet). Mathematics only; not gambling advice.","required_inputs":["odds"],"optional_inputs":["format","stake"],"urls":{"html":"https://tttkmbb.com/gaming/odds-converter","markdown":"https://tttkmbb.com/gaming/odds-converter.md","schema":"https://tttkmbb.com/api/v1/calculators/odds-converter","api":"https://tttkmbb.com/api/v1/calculate/odds-converter"}},{"calculator_id":"parlay-odds","entity_type":"calculator","name":"Parlay Odds Calculator","category":"gaming","tool_name":"calculate_parlay_odds","description":"Multiplies the decimal odds of 2–15 independent legs into the combined parlay (accumulator) price and reports the total payout, profit and implied probability of all legs winning.","use_when":"You want the combined odds or payout of a multi-leg parlay, accumulator or multi from the decimal price of each leg.","do_not_use_when":"The legs are correlated (same-game parlays are priced differently by bookmakers), you need a single price converted between formats (use odds-converter), or you want to know whether the bet has positive expected value (use bet-expected-value). Mathematics only; not gambling advice.","required_inputs":["decimal_odds"],"optional_inputs":["stake"],"urls":{"html":"https://tttkmbb.com/gaming/parlay-odds","markdown":"https://tttkmbb.com/gaming/parlay-odds.md","schema":"https://tttkmbb.com/api/v1/calculators/parlay-odds","api":"https://tttkmbb.com/api/v1/calculate/parlay-odds"}},{"calculator_id":"hedge-bet","entity_type":"calculator","name":"Hedge Bet Calculator","category":"gaming","tool_name":"calculate_hedge_bet","description":"Computes the stake to place on the opposite outcome so that the profit is the same whether the original bet or the hedge wins, and the profit (or loss) that this locks in.","use_when":"You hold a bet whose odds have shortened (a futures ticket or a live bet) and want to know how much to stake on the other side to lock in an equal result either way.","do_not_use_when":"You are placing fresh bets on all outcomes at the best available prices (use arbitrage-bet), or you want to hedge for a break-even instead of an equal profit. Mathematics only; not gambling advice.","required_inputs":["original_stake","original_decimal_odds","hedge_decimal_odds"],"optional_inputs":[],"urls":{"html":"https://tttkmbb.com/gaming/hedge-bet","markdown":"https://tttkmbb.com/gaming/hedge-bet.md","schema":"https://tttkmbb.com/api/v1/calculators/hedge-bet","api":"https://tttkmbb.com/api/v1/calculate/hedge-bet"}},{"calculator_id":"arbitrage-bet","entity_type":"calculator","name":"Arbitrage Betting Calculator","category":"gaming","tool_name":"calculate_arbitrage_bet","description":"Sums the implied probabilities of the best decimal odds available on each outcome of a 2- or 3-way market, tests whether an arbitrage exists (sum below 100 %) and splits a total stake so that every outcome returns the same payout.","use_when":"You have the best price for each outcome of a market (from different bookmakers or an exchange) and want to know whether the prices overlap, how to split the stake, and the guaranteed return.","do_not_use_when":"You already hold one bet and want to cover it (use hedge-bet), or the market has more than three outcomes. Mathematics only; not gambling advice: stake limits, voided bets and stake rounding can turn a paper arbitrage into a loss.","required_inputs":["decimal_odds"],"optional_inputs":["total_stake"],"urls":{"html":"https://tttkmbb.com/gaming/arbitrage-bet","markdown":"https://tttkmbb.com/gaming/arbitrage-bet.md","schema":"https://tttkmbb.com/api/v1/calculators/arbitrage-bet","api":"https://tttkmbb.com/api/v1/calculate/arbitrage-bet"}},{"calculator_id":"bet-expected-value","entity_type":"calculator","name":"Bet Expected Value Calculator","category":"gaming","tool_name":"calculate_bet_expected_value","description":"Computes the expected value of a bet from its decimal odds, your estimated win probability and the stake, together with the implied probability, the edge in percentage points and the fair (break-even) decimal odds.","use_when":"You have an estimate of the true win probability and want to know whether a price offers positive expected value, by how much, and what odds would be fair.","do_not_use_when":"You need the stake size that maximises bankroll growth (use kelly-criterion), a general probability-weighted mean of several outcomes (use expected-value), or only a format conversion (use odds-converter). Mathematics only; not gambling advice.","required_inputs":["decimal_odds","win_probability_percent"],"optional_inputs":["stake"],"urls":{"html":"https://tttkmbb.com/gaming/bet-expected-value","markdown":"https://tttkmbb.com/gaming/bet-expected-value.md","schema":"https://tttkmbb.com/api/v1/calculators/bet-expected-value","api":"https://tttkmbb.com/api/v1/calculate/bet-expected-value"}},{"calculator_id":"kelly-criterion","entity_type":"calculator","name":"Kelly Criterion Calculator","category":"gaming","tool_name":"calculate_kelly_stake","description":"Computes the Kelly stake fraction f* = (b·p − q)/b from decimal odds and an estimated win probability, the recommended stake for a bankroll at full or fractional Kelly, and the expected logarithmic growth rate per bet.","use_when":"You know the odds and your estimated win probability and want the bankroll fraction that maximises long-run growth (or a fractional-Kelly stake).","do_not_use_when":"The probability estimate is unreliable (Kelly over-bets badly when p is overstated), the bet has more than two outcomes, or you only need the expected value (use bet-expected-value). Mathematics only; not gambling advice.","required_inputs":["decimal_odds","win_probability_percent"],"optional_inputs":["bankroll","kelly_fraction"],"urls":{"html":"https://tttkmbb.com/gaming/kelly-criterion","markdown":"https://tttkmbb.com/gaming/kelly-criterion.md","schema":"https://tttkmbb.com/api/v1/calculators/kelly-criterion","api":"https://tttkmbb.com/api/v1/calculate/kelly-criterion"}},{"calculator_id":"poker-outs","entity_type":"calculator","name":"Poker Outs Calculator","category":"gaming","tool_name":"calculate_poker_outs","description":"Computes the exact probability of hitting one of your outs by the next card or by the river in Texas hold'em from the number of outs and unseen cards, expressed as a percentage and as odds against, and compares it with the rule of 2 and 4 estimate.","use_when":"You know how many cards complete your hand and want the exact probability of hitting by the turn or the river, or the odds against to compare with pot odds.","do_not_use_when":"You need the probability of specific starting hands or made hands (use combinations-permutations or hypergeometric-distribution), or games with a different deck. Mathematics only; not gambling advice.","required_inputs":["outs"],"optional_inputs":["street","unseen_cards"],"urls":{"html":"https://tttkmbb.com/gaming/poker-outs","markdown":"https://tttkmbb.com/gaming/poker-outs.md","schema":"https://tttkmbb.com/api/v1/calculators/poker-outs","api":"https://tttkmbb.com/api/v1/calculate/poker-outs"}},{"calculator_id":"elo-rating","entity_type":"calculator","name":"Elo Rating Calculator","category":"gaming","tool_name":"calculate_elo_rating","description":"Computes the expected score of two players from their Elo ratings with the logistic formula E = 1/(1 + 10^((R_b − R_a)/400)) and the rating change of each after a win, draw or loss for a given K-factor.","use_when":"You want the win expectancy between two rated players or the new ratings after a result, for chess or any Elo-based ranking (games, sports, matchmaking).","do_not_use_when":"The rating system uses a different scale or rating deviations (Glicko, TrueSkill), or you need ratings after a whole tournament with FIDE's rounding and 400-point rule. Mathematics only; not gambling advice.","required_inputs":["rating_a","rating_b","result"],"optional_inputs":["k_factor"],"urls":{"html":"https://tttkmbb.com/gaming/elo-rating","markdown":"https://tttkmbb.com/gaming/elo-rating.md","schema":"https://tttkmbb.com/api/v1/calculators/elo-rating","api":"https://tttkmbb.com/api/v1/calculate/elo-rating"}}]},"timestamp":"2026-09-24T03:46:48Z","next_actions":[],"links":{"docs":"https://tttkmbb.com/calculators.md"}}